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DAC960SU Family User Guide

1. z y Optional t Differential SCSI prive cha 1 1 Host Channel Ultra SCSI m AR is Disk Array Array 0 1 e Figure 2 1 System Block Diagram Manual No 771965 2 1 Controller Functions Controller Components Key components of the DAC960SU controller Figure 2 2 include i960 RISC processor Memory subsystem and DRAM cache e SCSI and I O subsystems The i960 Processor The DAC960SU CPU is a 32 bit Intel 1960 RISC microprocessor The CPU controls all functions of the controller including SCSI bus transfers RAID processing configuration data striping error recovery and drive rebuild Host Drive Drive Channel 0 Channel 0 Channel 1 Cache Memory DRAM i960 II 53C770 53C770 53C770 SCSI I O SCSI I O SCSI I O CPU MCU Processor Processor Processor U U Il Ih 32 bit Bus Board i Connectors 8 bit 8 bit Bus Interface Il LCD Serial Interface PIA EC UART C port Figure 2 2 Controller Block Diagram SCSI Bus Interface The DAC960SU uses the Symbios Logic 53C770 SCSI I O processor chip on each SCSI channel to allow the controller to simultaneously communi cate with the host system and read or write data on several drives Up to seven disk
2. Figure C 4 DAC960SU Before BBU Installation 3 Prepare the battery backup module for installation by removing the pin cover and label from J1 as shown in Figure WARNING When assembling the cable to an external battery make sure its connector is properly wired Incorrect assembly of this cable will damage both the battery and the battery backup module Manual No 771965 C 9 Installation Caution Do not overtighten the BBU Clamp Screws Just seat DRAM SIMM N them If a torque screwdriver is used do not exceed 4 in Ib Remove Label and Pin Cover from J1 on BBU before Installing ij Batteries Figure C 5 DAC960SU After BBU Installation 4 Insert connector J1 of the DBB960S battery backup module into connector 72 on the DAC960SU controller 5 Secure the BBU module with the BBU Clamp refer to Figure C 5 AN Caution Do not overtighten the BBU Clamp screws just seat them Do not tighten more than 4 in Ib if a torque screwdriver is used Note If an external battery is being used connect the 3 wire plug coming from the external battery to the JP2 connector on the BBU module On the DBB960S it will be necessary to change the position of SW1 to the EXT position to enable the external battery Optional Connect an external LED
3. Connector Indicator Description J1 Interface to host DAC960SU controller JP1 Connector LED DBB9606G status indicator external JP2 Connector 3 pin Molex Battery source CR1 LED DBB960S status indicator FRONT BACK SW1 JP2 JP1 JP2 SW1 m nona nn 42 H gt gt Eb LED 2 lt 5 20 gt 2 Lj lt lt A Begonnen J1 J1 Eae Figure C 1 DBB960S Battery Backup Module DAC960SU Family User Guide Battery Backup Unit Specifications Electrical Battery source internal 2 4V nickel cadmium 650mAh fused Fuse Raychem SRP 175 current trip 3 8A hold 1 75A Battery source external 1 2V 4V optional Charge current based on 2 4V battery 4 trickle Charging current will change for different battery voltages Charge time 40 hours approx internal nickel cadmium battery from a deep discharge On board Battery Dual 2 ea Prismatic type nickel cadmium 1 2V in series Battery Charge Life Minimum 80 of capacity until one of the following occurs e 500 discharge charge cycles 3 years operation Table C 2 Typical On board Battery Capacities Cache Size Battery Capacity Memory Type in Mbytes Fully charged DRAM 4 32 MB 22 9 Hours Battery Connector Molex 3 pin connector Socket on BBU Molex P N 53015 0310 Plug from battery Molex P N 51004 0300 Pins w s
4. Ties Figure C 2 Functional Block Diagram Status Indication A LED indicator on the DBB960S illuminates to signal when data is in the cache during a power outage condition the LED is always on when the DAC960SU has power The indicator may be connected to an external LED to assist in monitoring the function of the battery backup unit The following table describes various conditions indicated by the BBU and LED states Manual No 771965 C 5 Functional Description Table C 3 DBB960S LED State Table System DAC960SU DBB960S Power Cache contents LED On Data Present On On Empty On Off Data Present On Off Empty Off Battery and Charge Circuit The primary power source used to refresh the DAC960SU memory module during system power failure is the DBB960S on board battery pack A user supplied external battery may also be used as an alterna tive power source On board Battery The DBB960S Battery Backup Unit has a battery pack bonded onto it The on board battery pack is rated at 2 4V has a capacity of 650mAh and consists of a pair of rechargeable nickel cadmium batteries The on board battery provides up to 22 hours of backup for 4AMbyte DRAM module Battery Charger The charging circuit on the BBU module supplies a trickle charge to the battery whenever the system is powered on The charging circuit consists of 5V source in series with a diode which creates a 0 7V drop
5. C 1 Specifications sereia rp oh rp e C 3 Electrical 22 a Ret Ue ants tie C 3 On board Battery 2 1 ee eite meret C 3 Battery Charge Life 4 444444440412 C 3 Battery Connector eese C 3 External Battery C 3 Module Dimensions C 4 Environmental C 4 Functional Description 2 4 0 4 44 44 1 en C 5 Status Indication icm ree tenent C 5 Battery and Charge Circuit see C 6 Installation 22 4033 tee arid aides diene C 8 Mechanical Installation Procedure C 8 Operation i 2 2 4 48 8 eee edad akin C 11 Battery Conditioning Prior to Use C 11 Set up Enabling the Write Back Cache C 12 RR DOR SIR 12 xii DAC960SU Family User Guide Testing the Battery Backup Module C 12 Removing the Battery Backup Module C 12 Recycling the Battery 4 2221442 C 13 Feference iicet ea See e e ec e beta C 14 Calculating Charging Current 2 C 14 Appendix D Error Messages Glossary Cache oe RR ERR URN er REO 1 Channel
6. Controlling Standby Replacement Drives Hot Spares 2 21 Hot Swap Drive Replacement 2 22 Disk Failure Detection 8 2 22 Disk Media Error Management 2 22 Checking Consistency seem 2 23 Cache Management 2 23 Read Ahead 2 23 Write Through 2 23 Write Back Cache 2 24 Manual No 771965 ix Chapter 3 Installation Installation Overview se meme 3 1 Requirements ODItIOFIS rr E reor Ta EX cepe qq Enclosure Requirements DACQ60SUI 3 2 Before You Begin 7 iine A 3 2 DAGO60SU Installation ncc interi ttt 3 4 Configuring Jumper and Termination Settings 3 4 SCSI Termination Rules eene 3 7 Terminating Internal Disk Arrays 3 7 Daughter Board SCSI ID and Termination 3 10 SCSI Cabling Rules 0 4 3 11 Cable Lengths RE 3 12 DAC960SU Physical Installation Procedure 3 13 DACO960SUI Installation 2 3 15 Configu
7. LCD Terminal Action Key Action Key ESC Esc Quits the function before the array is created A prompt screen to Exit or Continue is displayed see Figure 6 12 and Table 6 12 K3 Num keypad Increments the RAID level number K4 Num keypad Decrements the RAID level number Enter Enter Invokes the function and displays the next page Manual No 771965 6 15 Configuration Menu Page One LUN Size Create Array Page Four 8 9685 AWB Ver CONFIGURATION ADMINISTRATION MESSAGE 1 Get Configuration 2 Shou Configuration 3 Create firray Enter size of LUN to create in MegaBytes INFORMATION Available Capacity 658 HB Selected Drives CHN TGT 6 6 8 1 6 3 Enter size nnn Aval Cap nnn 000102 lt 2 Figure 6 8 LUN Size Create Array Page Four 6 16 DAC960SU Family User Guide Configuration Menu Table 6 8 Create Array Page Four Description Indication Key Description Enter size nnn Number sets the usable capacity in megabytes for the logical unit being created Aval Cap nnn Indicates maximum drive capacity in megabytes available for the logical unit being created CI nnnnnn etc Number pairs indicate the SCSI identification of each drive that comprise the array The first digit in each pair is the SCSI channel number The second digit in each pair is the drive
8. Connector Description P1 Edge Connector DAC960SU Controller board J1 Fault Indication Drive Channel 0 J2 Fault Indication Drive Channel 1 J3 Serial Port J4 Reserved DO NOT USE J5 AEMI Array Enclosure Management Interface Port J6 Configuration Jumpers J7 Not used J8 FAST WIDE Ultra SCSI Connector Drive Channel 0 J9 FAST WIDE Ultra SCSI Connector Drive Channel 1 J10 Power Connector J11 FAST WIDE SCSI Connector Host Channel 0 J12 Power Connector Manual No 771965 3 5 DACO960SU Installation Distribution Board Configuration Jumper J6 1 Figure 3 2 Configuration Jumper J6 DBX960S 3 FS Distribution Board Table 3 2 Configuration Jumper Settings Distribution Board Jumper J6 Pin Description Shunt On Shunt Off 1 Host Channel 0 SCSI ID bit 0 Bit 0 set Bit 0 clear Default 2 Host Channel 0 SCSI ID bit 1 Bit 1 set Bit 1 clear Default 3 Host Channel 0 SCSI ID bit 2 Bit 2 set Bit 2 clear Default 4 Host Channel 0 SCSI ID bit 3 Bit 3 set Bit 3 clear Default 5 Reserved Leave at Default N A Default 6 Serial Port Protocol VT100 SLP1 Default 7 Serial Port Baud Rate 19 2K Baud Reserved Default Leave at Default 8 Reserved Leave at Default Default N A Table 3 3 Host Channel SCSI ID Settings Distribution Board Jumper J6 Host Channel SCSI ID
9. Figure B 3 Connecting the Daughter Board to the Controller 2 Connectthe flex cable from J2 on the DBI960SU daughter board to J3 on the DAC960SU controller board so that the controller is under the daughter board 3 Connect the flex cable from J3 on the DBI960SU daughter board to J4 on the DAC960SU controller board 4 Plug both the DAC960SU controller and the DBI960SU daughter board into the distribution board Manual No 771965 B 5 Daughter Board Installation B 6 DAC960SU Family User s Manual Battery Backup Unit Product Description The DBB960S BBU is an add on module that provides power to the DAC960SU Disk Array Controller cache memory in the event of a power failure The battery backup module monitors the DAC960SU write back cache and provides power to the cache if it contains data not yet written to the drives when power is lost The DAC960SU controller with the DBB960 battery backup module installed together occupy only one I O slot P1 on the on the distribution board DBB960S Connectors and Indicator The DBB960S Battery Backup Module has several connectors and an indicator LED that are of importance to the user Refer to the following table and to Figure to identify their locations on the battery backup unit Manual No 771965 C 1 Product Description Table C 1 DBB960S Connectors and Indicator Functions
10. Manual No 771965 7 27 Administration Menu Page Two 7 28 DAC960SU Family User Guide Chapter 8 Toolkit Menu Toolkit Menu Summary The Toolkit Menu allows monitoring of drive information and drive preparation prior to array configuration This menu can also be used for diagnostics and maintenance The Toolkit menu is organized as follows Toolkit Menu Page One Show Drives Drive Information Change Drive State Toolkit Menu Page Two Format Drives Controller Parameters Controller Diagnostics Toolkit Menu Page Three e Scan Manual No 771965 8 1 Toolkit Menu Page One Toolkit Menu Page One DRC968S ANB Uer 7777 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 Show Drives 2 Drive Information 3 Change Drive State ENTER PARAMETER INSTRUCTION Enter option N for more options lt Esc gt for previous menu INFORMATION Show Drives Drive Information Change Drive State sho inf str nxt Figure 8 1 Toolkit Menu Page One 8 2 DAC960SU Family User Guide Toolkit Menu Table 8 1 Toolkit Menu Page One Description Indication Key Description Show Drives Function that displays the operational state of drives in the array online dead standby write only and the first logical unit number associated with each drive Drive Information Menu selection that allows user to get specific informa
11. lt gt 5 Select the SCSI channel that contains the drive to add to the array and press Enter The following information is displayed Target ID 2 n 6 Select the SCSI ID number of a drive to add and press Enter The display confirms the selection with a line similar to the following CI 01 Where is the SCSI channel ID 0 is the SCSI channel number and 1 is the SCSI ID of the selected drive 7 Repeat the channel and drive selection steps for each drive to add The display identifies each drive on the screen as it is selected similarly to the following Manual No 771965 4 17 Configuring the Array 0 9605 ANB Uer 727727 CONFIGURATION ADMINISTRATION MESSRGE OPTIONS 3 1 Get Configuration 2 Show Configuration 3 Create Array ENTER PARAMETER 9 INSTRUCTION Enter Channel Number INFORMATION Select the drives upto 8 for the Array lt Esc gt to end selection Channel 0 drives ESC to end 0001 02 lt gt 8 When the last drive to add is selected press ESC The RAID level selection page is displayed 4 18 DAC960SU Family User Guide Configuration 8 9605 AWB Ver CONFIGURATION ADMINISTRATION IMESSRGE OPTIONS 1 Get Configuration 2 Show Configuration 3 Create Array ENTER PARAMETER INSTRUCTION Enter RAID Level for the LUN INFORMATION Possible RAID L
12. 14 DAC960SU Family User Guide Appendix D Error Messages Table D 1 DAC960SU Error Messages Error Message Description Menu Function Cannot Format Drive Invalid choice of drive Format Drives Cannot use drive Invalid choice of drive Create Array Controller Busy Diagnostics could not be run because controller is busy Controller Diag Cur cfg will change Current configuration will change if Save is invoked Save Configuration Diagnostics Failed Controller diagnostics failed Controller Diag Entire array used No space remains in current array to create additional logical units Create Array Error Code nnnn Diagnostics failed number indicates type of failure Controller Diag Fail Chk Rbl in Failure due to a parity check or LUN operation Prog rebuild already in progress Failed Bad Failure in saving the configuration to Save Configuration EEPROM EPROM Failed Bad Failure in saving the configuration to Save Configuration NVRAM Non volatile RAM Failed Channel Drive channel is busy Drive Information Busy Change Drive State Failed Check in A parity check is is progress on the LUN operation Prog addressed LUN Failed Disk failed New disk failure Start Rebuild Failed Drive Dead Failure due to a dead dependent drive LUN operation Failed Drv Not Ready Unable to start drive Drive Information Change
13. Enter Channel Number INF RHATION Channel n lt 2 Figure 6 15 Select Channel Create Standby Page One 6 30 DAC960SU Family User Guide Configuration Menu Table 6 15 Create Standby Page One Description Indication Key Description Channel n Number indicates the SCSI channel number of the drive to be made a standby hot spare LCD Terminal Action Key Action Key ESC Esc Cancels the function no standby drive is created and displays the previous menu screen K3 Num keypad Increments channel number K4 Num keypad Decrements channel number Enter Enter Selects the channel number indicated and displays the next page Manual No 771965 Configuration Menu Page Two Select Drive Create Standby Page Two DAC9 OS AWB 27a7 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 2 1 Delete Last Array 2 Create Standby 3 Save Configuration IENTER PARAMETER INSTRUCTION Enter Target ID INFORMATION Target ID n e 2 e Figure 6 16 Select Drive Create Standby Page Two 6 32 DAC960SU Family User Guide Configuration Menu Table 6 16 Create Standby Page Two Description Indication Key Description Target ID n Number indicates the SCSI identification of a drive to be made a standby hot spare LCD Terminal Action Key Action Key
14. Start Initialize Change Write Policy int nxt 3 Select the Start Initialize function by pressing the button under the int prompt or pressing lt 1 gt Press Enter The following screen is displayed 4 26 DAC960SU Family User Guide Configuration 9 5 ANB Ver 5777 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 1 Start Initialize 2 Change Write Policy NTER PARAMETER 8 INSTRUCTION Enter LUN TMFORMATION Enter LUN n lt gt Manual No 771965 4 27 Configuring the Array 4 Select the logical unit number LUN to be initialized Press Enter The following confirmation screen is displayed MESSAGE OPTIONS 1 1 Start Initialize 2 Change Write Policy HTER PARAMETER INSTRUCTION it v to Initialize LUN H to quit INFORMATION Initialize LUH H8 AWB Uer 7772 CONFIGURATION Z RDHIHISTRATIOH yes no Initialize LUN n 5 Verify the selection is correct and press yes Press no to cancel the selection The following message is displayed Initialize started 6 Press any Key to return to the previous Configuration Menu screen You can select the Start Initialize function again to simultaneously initialize more logical units if needed 7 Press ESC twice to return to the Title screen The percentage of completion is displayed on
15. 8 8 8 1 0 3 Entire array used 000102 Press any key Figure 6 11 Array Configuration Create Array Page Seven 6 22 DAC960SU Family User Guide Configuration Menu Table 6 11 Create Array Page Seven Description Indication Key Description Entire array used Message indicates that all available capacity on the drive group is assigned to one or more logical units nnnnnn Number pairs indicate the SCSI identification of each drive that will comprise the array The first digit in each pair is the SCSI channel number The second digit is the SCSI ID number Press any key Prompt to clear this status screen LCD Terminal Action Key Action Key Any key Any Selection clears this message screen and displays character key the previous menu Manual No 771965 6 23 Configuration Menu Page One Exit Continue Configuration Create Array Alternate Screen The Exit Continue Configuration Prompt will appear if you change your mind after starting to create an array and then back out of the process before completion using the ESC key DACI6OS AWB Uer 9777 CONFIGURATION Z ADMINISTRATION MESSAGE OPTIONS Get Configuration Show Configuration Create Array w N HTER PARAHETER INSTRUCTION it v to exit H to continue INFORMATION The current array will be deleted Selected Drives CHN TGT 0 8 8 1 3 Array will
16. STARTUP COMPLETE Status message indicates successful completion of power on self test POST diagnostics LCD Terminal Action Key Action Key Enter Invokes menu access log on procedure when held for at least five seconds Alarm Resets audible alarm in all screens 5 8 DAC960SU Family User Guide User Interface Menu Mode Log in Password Prompt MESSAGE STARTUP COMPLETE nter password DACI6OS AHB Ver aaan CONFIGURATION ADMINISTRATION PASSWORD Figure 5 6 Password Prompt Display Table 5 3 Password Screen Description Indication Key Description PASSWORD The password feature is not implemented in this version of the DAC960SU LCD Terminal Action Key Action Key ESC Esc Cancels the menu access routine and returns the display to the monitor mode main title screen Enter Enter Clears the password prompt and launches the main menu screen Manual No 771965 5 9 Menu Mode Main Menu Screen Menu Mode Main Menu Screen 0 9605 LU MP a7a7 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 Configuration 2 Administration 3 Toolkit ENTER PARAMETER INSTRUCTION Enter option N for more options lt Esc gt for previous menu INF RHATION Configuration Administration Toolkit cfg adm tk nxt Figure 5 7 Main Menu Display 5 10 DAC960SU Family User Guide User Interface
17. 1 Rebuild Check Rate 2 Start Rebuild 3 Start Parity Check PARAMETER INSTRUCTION Enter Channel Number INFORMATION Channel n lt 2 Figure 7 4 Start Rebuild Page One 7 8 DAC960SU Family User Guide Administration Menu Table 7 4 Start Rebuild Page One Description Indication Key Description Channel 2 n Number indicates the SCSI channel of the drive to rebuild LCD Terminal Action Key Action Key ESC Esc Displays the previous menu screen K3 Num keypad Increments channel number K4 Num keypad Decrements channel number Enter Enter Selects the drive channel for the drive to be rebuilt and displays the next screen Manual No 771965 7 9 Administration Menu Page One Select Target Drive Start Rebuild Page Two DaC968sS WB Ver 277 CONFIGURATION RDHIHISTRATIUH MESSAGE OPTIONS 2 1 Rebuild Check Rate 2 Start Rebuild 8 Start Parity Check HTER PARAMETER INSTRUCTION Enter Target ID INFORMATION Target ID n lt 2 Figure 7 5 Select Target Drive Start Rebuild Page Two 7 10 DAC960SU Family User Guide Administration Menu Table 7 5 Start Rebuild Page Two Description Indication Key Description Target ID n Number indicates the SCSI ID of the drive to rebuild LCD Terminal Action Key Action Key ESC Esc Displa
18. 1 Drives are paired and mirrored All data is 100 dupli 2 2 cated on an equivalent drive fully redundant 3 Data is striped across several physical drives Parity 3 8 protection is used for data redundancy 5 Data is striped across several physical drives Parity 3 8 protection is used for data redundancy 0 1 Combination of RAID levels 0 and 1 Mylex RAID 6 3 8 Provides striping and redundancy through mirroring JBOD Just a Bunch of Drives Mylex RAID 7 Each drive 1 n operates independently as with a common host bus adapter or multiple drives may be spanned and seen as a single very large drive There is no redundancy n total available drives Manual No 771965 2 11 RAID Management RAID Techniques The techniques of disk striping mirroring and parity redundancy are fundamental elements of RAID technology performed by the DAC960SU More detailed information on how to apply these techniques can be found in the DACCF Utilities manual JBOD No RAID JBOD is an acronym for Just a Bunch Of Disks The disks function independently as they would on a non RAID SCSI controller DISK READ OPERATION Access Time Data EXON EE a Seek and Rotation Transfer DAC960SU lt lt Total Execution Time Figure 2 5 Typical JBOD Disk I O Activity Mirroring RAID 1 Mirroring refers to the 10046 duplication of data from one disk drive ont
19. LUN 0 1 2 yes no Figure 6 14 Delete Last Array Screen 6 28 DAC960SU Family User Guide Configuration Menu Table 6 14 Delete Last Array Description Indication Key Description May delete LUNs OK Prompt indicates that the function will delete all logical units of the last Drive Group created LUN Number identifies the LUNs that make up the last Drive Group created LCD Terminal Action Key Action Key ESC Esc Cancels the function no array is deleted and displays the previous menu screen K1 yes Y Selection deletes the last Drive Group created K2 no N Cancels the function no array is deleted and displays the previous menu screen Manual No 771965 6 29 Configuration Menu Page Two Create Standby Function The Create Standby function is used to designate a drive that will be a standby replacement or hot spare drive for a redundant array e g RAID 1 RAID 3 RAID 5 or RAID 0 1 Note A standby drive must be created for the DAC960SU Automatic Rebuild function to operate properly with a redundant array A Caution A Standby Drive must have at least as much capacity as the largest drive in the array or the rebuild may not start ADMINISTRATION MESSAGE 2 1 Delete Last Array 2 Create Standby 3 Save Configuration INSTRUCTION
20. Table 5 4 Main Menu Description Indication Key Description Configuration Menu selection that allows arrays to be created configured saved or deleted Administration Menu selection that allows management of array resources Toolkit Menu selection for drive and controller utilities gt Indicator arrow marks active selection LCD Terminal Action Key Action Key ESC Esc Displays the previous screen title screen K1 cfg 1 Selects the Configuration menu screens K2 adm 2 Selects the Administration menu screens K3 3 Selects the Toolkit menu screens K4 nxt N Key not used on this screen Enter Enter Invokes the menu selection indicated by the selection arrow Manual No 771965 Menu Mode Main Menu Screen 5 12 DAC960SU Family User Guide Chapter 6 Configuration Menu Configuration Menu Summary The Configuration Menu is used to customize the configuration of the RAID array The disks on each available SCSI channel can be combined into arrays with one or more logical units RAID levels 0 0 1 1 3 5 and JBOD are all supported The menu is organized as follows Configuration Menu Page One Get Configuration Show Configuration Create Array Configuration Menu Page Two Delete Last Array Create Standby Save Configuration Configuration Menu Page Three Start Initialization Change Write Policy Manual No 771965 6 1 Configuration Menu
21. No Stat Avail No LUN statistics are available LUN operation Saving failed Unable to save configuration Controller Params changes to controller parameters SEr n The number of drive soft errors Drive Information Undefined LUN Invalid LUN selection LUN operation Illegal Operation Operation is illegal because there is no Master Slave configuration Release Controller Relinquish Control D 2 DAC960SU Family User Guide Table D 3 DAC960SU Warning Messages Error Messages Warning Message Description Menu Function Aray will be deleted Attempt to quit before array is created will cause configuration entries made in this Create Array session to be lost Create Array Cfg changed Exit Attempt to exit menu before initializing a LUN that was created Configuration Menu SBY size too small The size of the Standby Drive is too small to use in the existing configuration Create Standby Manual No 771965 D 3 D 4 DAC960SU Family User Guide Glossary Cache Controller memory used to speed up data transfer to and from a disk Channel A path for the transfer of data and control information between drives and the drive controller Disk array controllers often have multiple channels and each channel supports multiple drives Data transfer capacity The amount of data moved between devices Generally measured in Megabytes sec Disk striping The cont
22. Parity Check LUN 6 to quit ANB Uer 22777 CONFIGURATION Z ADMINISTRATION Parity check LUN n yes no Figure 7 8 Parity Check Confirmation Start Parity Check Page Two 7 16 DAC960SU Family User Guide Administration Menu Table 7 8 Parity Check Confirmation Page Two Description Indication Key Description Parity check LUN n Number indicates the logical unit number LUN of the logical unit selected to parity check LCD Terminal Action Key Action Key ESC Esc Cancels the parity check and displays the first page of the Administration menu K1 yes Y Invokes the Start Parity Check function and displays the previous menu screen K2 no N Cancels the parity check and displays the first page of the Administration menu Manual No 771965 Administration Menu Page One Parity Check Status Start Parity Check Page Three Dat968s MESSAGE OPTIONS 3 1 Rebuild Check Rate 2 Start Rebuild 3 Start Parity Check PARAMETER INSTRUCTION Enter LUN INFORMATION AWB Uer 777 CONFIGURATION Z ADMINISTRATION Parity check started Press any key Figure 7 9 Parity Check Status Start Parity Check Page Three 7 18 DAC960SU Family User Guide Administration Menu Table 7 9 Start Parity Check Page Three Description Indication Key Description Parity
23. SCSI Bit 0 Bit 1 Bit 2 Bit 3 ID Pin 1 Pin 2 Pin 3 Pin 4 0 Off Off Off Off 1 On Off Off Off 2 Off On Off Off 3 On On Off Off 4 Off Off On Off 5 On Off On Off 6 Off On On Off 7 On On On Off 8 Off Off Off On 9 On Off Off On 10 Off On Off On 11 On On Off On 12 Off Off On On 18 On Off On On 14 Off On On On 15 On On On On 3 6 DAC960SU Family User Guide Installation SCSI Termination Rules The DAC960SU controller has on board ALT 2 type SCSI terminators on all drive channels Terminating a SCSI chain is accomplished either by adding a terminator to the each end of the SCSI bus or by terminating the devices closest to each of the two ends of the SCSI bus Note The use of an external terminal at the end of the SCSI bus away from the DAC960SU is preferred to terminating the SCSI device at that end as this allows drives to be added to or removed from the SCSI bus without having to add or remove termination Terminating Internal Disk Arrays When using single ended termination all the SCSI devices on a channel are connected to the internal connector of the channel and the end of the SCSI bus farthest from the controller has a terminator installed A typical DAC960SU or DAC960SUI termination configuration is shown in Figure 3 3 Host Adapter DAC960SUI Disk Array 7 Fn any drive channel D IDO No Termination Termination 7 Enabled ID 1 No
24. Table 8 10 Toolkit Menu Page Two Description Indication Key Description Format Drives Menu selection that allows user to perform a low level format on drives not yet in an array Controller Params Menu selection that allows user to change specific operating parameters for the controller drives and SCSI channels Controller Diag Menu selection that allows user to run a self test diagnostic on the controller Indicator arrow marks the active selection gt LCD Terminal Action Key Action Key ESC Esc Displays the previous screen main menu K1 fmt 1 Selects the Format Drives function K2 cpr 2 Selects the Controller Parameters function 3 Selects the Controller Diagnostics function K4 nxt N Selects the next page of Toolkit menu selections Enter Enter Invokes the submenu selection or function indicated by the selection arrow Manual No 771965 8 21 Toolkit Menu Page Two Format Drives Function The Format Drives function performs a low level format on selected drives WARNING Formatting a drive will result in loss of all data on that drive Make sure that the correct drives are selected before starting the Format Drives function DAC96OS AHB Ver saan CONFIGURATION ADHINISTRATION 1 Format Drives 2 Controller Parameters 3 Controller Diagnostics HTER PARAMETER INSTRUCTION Enter option N for more options lt Esc g
25. and to indicate your acceptance of this warranty we must have the attached Warranty Registration Card completed and returned to us within 15 days of your purchase Also in order for us to provide you the highest level of service we must know where you purchased your MYLEX product Three Year Limited Warranty If at any time during the thirty six month period immediately following the date of original purchase of the MYLEX product enclosed herewith the PRODUCT you discover one or more defects in the material or workmanship MYLEX will repair or at MYLEX s sole option replace the PRODUCT If the PRODUCT fails to operate at any time within seven days after the date of its original purchase it will be replaced by MYLEX Such repair or replace ment will be your sole remedy against MYLEX MYLEX s only liability to you for any failure or malfunction of the PRODUCT The warranty set forth in this paragraph will be void if 1 The PRODUCT has been installed in an improper manner or in an improper operating environment 2 The PRODUCT has been modified or repaired by any party other than MYLEX or a MYLEX factory authorized service center 3 The PRODUCT has been damaged Some MYLEX products will have a Warranty Expiration Date label affixed to the product itself When present the warranty period will extend through the last day of the month indicated This warranty will not apply to and MYLEX provides no warranty for any BIOS sof
26. description of its RAID and SCSI functionality Chapter 3 contains an overview of the installation instructions for setting the SCSI termination and configuration jumpers prior to installation and a step by step installation procedure Chapter 4 contains information relating to the various methods for configuring the controller to make it ready to use with step by step instructions for configuring the DAC960SUI from its front panel controls Chapter 5 contains information on using the LCD interface and the VT100 menu screens Chapters 6 7 and 8 provide detailed descriptions of the DAC960SUI front panel LCD and VT100 menu screens Reference material for the controller various distribution boards and accessories are located in the Appendices Conventions Throughout the manual the following conventions are used to describe user interaction with the product bold user must enter the bold text exactly as shown 4 Press the Enter key Enter Press the key labeled Enter or Delete etc File Run Select the Run option from the pull down menu activated when the File menu pad is selected Note Supplementary information that can have an effect on system performance AN Caution Notification that a proscribed action has the potential to adversely affect equipment operation system performance or data integrity WARNING Notification that a proscribed action will definitely result in equipment damage data
27. screws etc SCSI cable s to interconnect the controller and disk drives SCSI hard disk drives refer to the Configuration amp Utilities diskette Readme file for a drive compatibility list Options The following optional items may also be required depending on the type of installation Serial communications null modem cable VT100 compatible terminal or equivalent Manual No 771965 3 1 Before You Begin Enclosure Requirements DAC960SUI The is essentially the same form factor as a 5 A inch full height hard disk drive It is designed to fit into a standard 5 inch full height drive bay located in a server chassis a separate disk drive enclosure or a stand alone utility cabinet Standard mounting holes are located on both sides and on the bottom of the DAC960SUI Controller These mounting holes accept commonly available No 6 32 coarse thread screws Before You Begin Installing the DAC960SU is easy Just follow these common sense rules and the installation procedures should go flawlessly 1l REMOVE POWER from all components before starting 2 Read all of the instructions in this manual through completely before proceeding and observe the Notes Cautions and Warnings 3 Determine the system s SCSI ID and termination requirements and set the controller jumpers as needed before mounting the hardware 4 Make sure that all of the cabling Pin 1 locations are correct 5 Safety check the installation be
28. 13 Drives States on the Show Drives LCD Screen 2 18 DAC960SU Family User Guide Functional Description On line O or ONL A SCSI drive physical drive is on line if it 1 Is powered on 2 Has been defined as a member of a drive group 3 Is operating properly Standby S or SBY A SCSI disk drive is in a standby state if it 1 Is powered on 2 Isable to operate properly 3 Has not been defined as part of any drive group 4 Has been defined as a standby Dead D or DED A drive is dead if it 1 Is not present 2 Is present but not powered on 3 Fails to operate properly and is killed by the controller whether or not it has been defined as a member of a drive group When the controller detects a failure on a disk it kills that disk by changing its state to dead A SCSI drive that is in the dead state does not participate in any I O activity No commands are issued to dead drives Write Only W or WOL A SCSI drive is in a write only state if it was in the process of being rebuilt that is During a RAID 1 rebuild data is being copied from the mirrored drive to the replacement drive or During a RAID 3 RAID 5 or RAID 0 1 rebuild data is being regenerated via the XOR redundancy algorithm and written to the replacement drive and the rebuild was terminated abnormally before it completed Manual No 771965 2 19 Drive Management Controlling Logical Unit States The state of a DAC960SU logical unit can
29. 3 or RAID 5 and writes the data back to the disk that encountered the error If the write fails or the following verify of data fails media error on write the controller issues a REASSIGN command to the disk and then writes the data to a new location Since the problem has been resolved no error is reported to the system When a disk reports a media error during a write the controller issues a REASSIGN command to the disk and writes the data out to a new location on the disk 2 22 DAC960SU Family User Guide Functional Description Checking Consistency A consistency check is a process that verifies the integrity of redundant data For example performing a consistency check of a mirrored drive assures that the data on both drives of the mirrored pair are exactly the same To verify RAID 3 or RAID 5 redundancy a consistency check reads all associated data blocks computes parity reads parity and verifies that the computed parity matches the read parity Cache Management The DAC960SU provides performance enhancement of data transfers through its on board cache memory The controller supports cache memory sizes from 4 MB minimum to 128 MB maximum Cache memory is allocated by the controller memory management functions for Read Cache and Write Cache Write cache policy is user selectable for optimum performance within specific applications Read Ahead Cache Read ahead cache is a caching strategy where the DAC960SU contr
30. A logical unit or system drive is that portion of a drive group or a combination of up to four drive groups seen by the host system as a single logical device Each logical unit is identified to the host by its logical unit number LUN The DAC960SU supports up to eight 8 LUNs For example the third logical unit on a drive channel with a SCSI target ID of 1 will be seen by the host computer as ID 1 LUN 2 since LUN numbering begins at 0 and continues 1 2 3 etc 48 Note Use the VT100 utility or the DACCF utility to configure the logical units from one drive group Use only the DACCF software utility to configure logical units that span more than one drive group refer to the DACCF Utilities documentation 2 8 DAC960SU Family User Guide Functional Description Configuration on Disk fo fe Gc CONTROLLER DRIVE 1 SCSI CHANGE CHANNEL CHANGE COD updates the COD reads the change COD updates drives on new controller updates the new drive the affected channels Figure 2 3 Configuration on Disk examples Firmware 2 5 and above provides Configuration on Disk COD which allows a DAC960SU to detect certain hardware changes when they occur and automatically reconfigure accordingly The necessary configuration information is stored on the controller as well as on every hard disk that is c
31. Channel Boards 1 1 oooooo oooooo 3 UDR 46 8 3 FS J6 5550005555 1 12 9 6 UDR J6 EH 12 1 oe 9552 522929 12188 6 FNR J7 6 FWR J6 Figure 3 8 DAC960SUI Distribution Board Configuration Jumpers Table 3 7 Controller Distribution Board Configuration Jumper Identification DAC960SUI SCSI Application DBX960S Config Controller Model Distr Board Jumper No P N DAC960SUI 2D n Host Ultra Narrow DBX960S 3 UDR J6 Wide Diff 3 Ch Drive Ultra Wide or Narrow Single ended DAC960SUI 4D n Host Ultra Wide Diff DBX960S 6 UDR J6 6 Ch Drive Ultra Wide Single ended t DAC960SUI 2 n Ultra Narrow 3 Ch DBX960S 6 FNR J7 DAC960SUI 5 n Ultra Narrow 6 Ch T DBX960S 6 FNR J7 DAC960SUI 2W n Ultra Wide 3 Ch DBX960S 6 FWR 46 DAC960SUI 5W n Ultra Wide 6 Ch t DBX960S 6 FWR J6 n cache size MB TRequires DBI960SU 3 Daughter board Option DAC960SU Family User Guide Installation Table 3 8 Jumper Settings Distribution Board Configuration Jumper Pin Description Shunt On Shunt Off 1 Host Channel 0 SCSI ID bit 0 Bit 0 set Bit 0 clear Default 2 Host Channel 0 SCSI ID bit 1 Bit 1 set Bit 1 clear Default 3 Host Channel 0 SCSI ID bit 2 Bit 2 set Bit 2 clear Default 4 Host Channel 0 SCSI ID bit 3 Bit 3 set Bit 3 clear Defa
32. Channel n must NOT be held more than 1 second 17 Reserved 19 Reserved All Ground others OnaS channel distribution board Drive Channel can be Drive Channel 0 or 1 On a6 channel distribution board Drive Channel n can be Drive Channel 0 or 1 and with a DB960SU 3 Daughter board option installed Drive Channel n can be Drive Channel 2 3 or 4 Note The above table is for all DBX960S SU distribution boards with the exception of the DBX960S 6 UDR which has a different Fault and Status port 12 DAC960SU Family User Guide Distribution Boards Table A 12 AEMI Fault Signals Connector Distribution Board Pin Description In Out Active Misc 1 Fan 0 Fault Notification In Low Pulled up 3 Fan 1 Fault Notification In Low Pulled up 5 Fan 2 Fault Notification In Low Pulled up 7 Power Supply 0 Fault Notification In Low Pulled up 9 Power Supply 1 Fault Notification In Low Pulled up 11 Power Supply 2 Fault Notification In Low Pulled up 13 Over Temp Limit Notification In Low Pulled up 14 Alarm Reset In Low Pulled up Resets Alarm 15 Data in Cache Indication Out Low Open Collector Pulled up 17 Drive Channel Activity Indication Out Low Open Collector Pulled up 18 Alarm Out Low Open Collector can withstand 30V 19 Host Channel Activity Indication Out Low Open Collector Pulled up All Ground others Note The above table is for all DBX960S SU distribution
33. Drive State Manual No 771965 Table D 2 DAC960SU Error Messages continued Error Message Description Menu Function Failed Init in prog Failed because an initialization is in progress LUN operation Failed Invalid Dev Failure due to an invalid device Rebuild Drive Drive Information Change Drive State Failed Invalid LUN Failure due a non redundant logical unit or because a LUN does not exist LUN operation Failed No Device Drive or other device not available Drive Information Change Drive State Fail Rbl Chk in Prog Rebuild failed because another rebuild or parity check is already in progress Start Rebuild Failed Start failed Rebuild failed because drive could not start or was Online Start Rebuild Failed State Changed A change of state has occurred Save Configuration Format Failed Failure on Format function Format Drives Invalid drive Invalid choice of drive Create Standby Invalid Device Invalid device address All menus requiring a device address Invalid Option A submenu was not selected when required All menus requiring the selection of a submenu Max LUNs created Maximum number of logical units have been created Create Array No arrays defined There no LUNs to delete Delete Array No LUNs defined Invalid configuration Create Standby Show Configuration
34. I MFORMAT ION AWB Uer 22727 CONFIGURATION ADMINISTRATION lt gt Figure 8 21 Select Channel Screen AEMI Scan Page Two Table 8 21 AEMI Scan Page Two Description Indication Key Description Channel n Number indicates the SCSI channel to be scanned LCD Terminal Action Key Action Key ESC Esc Cancels the AEMI Scan function and displays the previous menu K3 Num keypad Increments the SCSI drive channel number K4 Num keypad Decrements the SCSI drive channel number Enter Enter Invokes the AEMI Scan function and displays the next screen 8 46 DAC960SU Family User Guide Toolkit Menu AEMI Scan Started AEMI Scan Page Three MESSAGE OPTIONS 1 1 Scan NTER PARAMETER 8 INSTRUCTION Press any key to continue TMFORMATION scan initiated AWB Uer 22777 CONFIGURATION Z ADMINISTRATION AEMI scan initiated Press any key Figure 8 22 AEMI Scan Started AEMI Scan Page Three Table 8 22 AEMI Scan Started AEMI Scan Page Three Description Indication Key Description AEMI scan initiated Message indicates the AEMI Scan diagnostics program is loaded and ready to be run Press any key Prompt for user action to run the scan on the selected SCSI channel Alarm Tone Audible alarm tone indicates that the AEMI Sc
35. J2 53C770 pus l 53C770 TO P2 i 53C770 4 J3 Figure B 1 DBX960SU Daughter Board Manual No 771965 B 1 Functional Description Table B 1 DBX960SU Connectors Jumper Identification Connector Description J1A Termination Jumpers J2 Controller Interconnect Port A J3 Controller Interconnect Port B Functional Description The default firmware version installed at the factory will support single host applications on the DAC960SU controller and three drive channels on the DBI960SU daughter board If a different application is desired it will be necessary to flash the firmware for that application using the software utility diskette supplied with the DBI960SU daughter board The standard version of the firmware is designed to work with the majority of host platforms Prior to the initial configuration of the array the SCSI Read Capacity command will report 0 MB zero MB on the array This may cause some UNIX systems to deny access to the controller until the array is configured For example if you are using a UNIX software program which is intended to configure and monitor the array by means of the SCSI interface you may be unable to do so In this case a special version of the firmware is available which reports 100 MB to the Read Capacity command if there is no valid configuration This will allow the software to send commands to the controller to configure and initialize the array Note Al
36. KB Sequential data Stripe transfer size 8 16 32 64 Blk Size Bytes Block size in bytes 512 Not changable Indicates default setting 8 36 DAC960SU Family User Guide Toolkit Menu Automatic Rebuild Management The Automatic Rebuild Management function works in conjunction with features in AEMI certified disk array enclosures It detects the removal of a failed drive and performs an automatic rebuild after a replacement drive is installed into a redundant fault tolerant array RAID 1 RAID 3 RAID 5 and RAID 0 1 Automatic Rebuild Management requires hardware compatibility with disk array enclosures that are certified AEMI Array Enclosure Management Interface compliant Fault Management The Fault Management function monitors and reports drive failures background activity completion status enclosure events etc This function should remain enabled during normal controller operation Do not disable this function unless specifically instructed to do so as part of a trouble shooting diagnostic activity SCSI Active Negation The SCSI Active Negation function controls the negation of SCSI signals When using the faster transfer rates associated with future technologies such as Ultra SCSI which is not supported on the DAC960SU at this time this feature may have to be enabled Active Negation provides faster negation of SCSI signals than negation with pull up drivers which is currentl
37. MYLEX without a valid RMA number will be returned to the shipper Products shipped to MYLEX must be shipped or mailed at the shipper s risk freight prepaid to the address below Mylex Corporation 34551 Ardenwood Blvd Fremont California U S A 94555 3607 Mylex will pay for return freight via such carrier as MYLEX shall deem appropriate Technical Support Technical support to assist you in resolving problems with MYLEX products is now available through MYLEX s Technical Support Department In the U S A the Technical Support Department can be reached by telephone at 510 796 6100 or by FAX at 510 745 7715 Current hours of operation which are subject to change are from 8 00 a m through 5 00 p m Pacific Time Mondays through Fridays excluding U S A national holidays Included with the shipment of most MYLEX products is a System Problem Report SPR form When contacting the Technical Support Department for assistance with an installation or compatibility problem we recommend that this form be completed and sent by facsimile or mail to MYLEX Completion of this form will allow our Technical Support Department to solve most technical problems expeditiously Mylex will make reasonable efforts to address compatibility problems which may arise with respect to third party products but shall not be responsible for the compatibility of its products with the products of any third party Cus tomers are advised to verify each products compat
38. Page One Configuration Menu Page One 0809605 ANB Uer 727727 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 Get Configuration 2 Show Configuration 3 Create Array ENTER PARAMETER INSTRUCTION Enter option N for more options lt Esc gt for previous menu INFORMATION Get Configuration Show Configuration Create Array get shw crt nxt Figure 6 1 Configuration Menu Page One 6 2 DAC960SU Family User Guide Configuration Menu Table 6 1 Configuration Menu Page One Description Indication Key Description Get Configuration Function that loads the current saved configuration data into the controller temporary work space Show Configuration Menu selection that allows user to review the current configuration data Create Array Menu selection that allows user to define the configuration parameters for a new array drive group gt Indicator arrow marks active selection LCD Terminal Action Key Action Key ESC Esc Displays the previous screen main menu K1 cfg 1 Selects the Get Configuration function K2 adm 2 Selects the Show Configuration function K3 tk 3 Selects the Create Array function K4 nxt N Selects the next page of Configuration menu selections Enter Enter Invokes the submenu selection or function indicated by the selection arrow Manual No 771965 6 3 Configuration Menu Page
39. SCSI ID Settings Distribution Board Configuration Jumper Bit 0 Bit 1 Bit 2 Bit 3 SCSI Host 0 Pin 1 Host 0 Pin 2 Host 0 Pin 3 Host 0 Pin 4 ID Host 1 Pin 9 Host 1 Pin 10 Host 1 Pin 11 Host 1 Pin 12 0 Off Off Off Off On Off Off Off 2 Off Off 3 On On Off Off 4 Off 5 On Off On Off 6 Off On On Off 8 Off Off Off On 9 On Off Off On 10 Off On Off On 11 On On Off On 12 13 14 15 Host 1 pins only available on 6 Channel distribution boards Manual No 771965 A 11 General Identification Table A 11 Drive Channel n Fault Indication Connector Distribution Board Pin Description In Out Active Misc 1 ID 0 Drive Fault Out Low Open Collector Pulled up Indicator Channel n 3 ID 1 Drive Fault Out Low Open Collector Pulled up Indicator Channel n 5 ID 2 Drive Fault Out Low Open Collector Pulled up Indicator Channel n 7 ID 3 Drive Fault Out Low Open Collector Pulled up Indicator Channel n 9 ID 4 Drive Fault Out Low Open Collector Pulled up Indicator Channel n 11 ID 5 Drive Fault Out Low Open Collector Pulled up Indicator Channel n 13 ID 6 Drive Fault Out Low Open Collector Pulled up Indicator Channel n 15 Drive Swap In Low Pulled up causes SCSI Notification reset on
40. Select Drive Drive Information Page Two 98 5 AWB Uer sana CONFIGURATION Z ADMINISTRATION MESSAGE OPTIONS 2 1 Show Drives 2 Drive Information 3 Change Drive State NTER PARAMETER EN INSTRUCTION Enter Target ID INFORMATION Target ID n Figure 8 4 Drive Information Page Two 8 8 DAC960SU Family User Guide Toolkit Menu Table 8 4 Drive Information Page Two Description Indication Key Description Target ID n Number indicates the SCSI ID of the drive about which to show information LCD Terminal Action Key Action Key ESC Esc Displays the previous menu screen K3 Num Keypad Increments the drive Target ID number K4 Num Keypad Decrements the drive Target ID number Enter Enter Selects the drive information function and displays the next screen Manual No 771965 8 9 Toolkit Menu Page One Information Display Drive Information Page Three Note If any soft errors associated with the drive represented on this screen have occurred they will be displayed here However upon exiting this screen the soft error counter will be cleared and a subsequent viewing of this screen will result in the soft error count being displayed as 0 0 9605 AWB Uer 22777 CONFIGURATION Z ADMINISTRATION MESSAGE OPTIONS 2 1 Show Drives 2 Drive Information 3 Change Drive St
41. and described immediately following their associated parent screen Descriptions for the Menu Mode screens and their subordinate screens are provided in the chapters that follow this one 5 6 DAC960SU Family User Guide Menu Screen Locator User Interface Table 5 1 provides a quick reference guide to menu screen locations Table 5 1 Controller Menu Screen Locator Main Menu Submenu Submenu Selection Locator Title Configuration Screen 1 Get Configuration Show Configuration Create Array Screen 2 Delete Last Array Create Standby Save Configuration Screen 3 Start Initialize Change Write Policy Administration Screen 1 Rebuild Check Rate Start Rebuild Start Parity Check Screen 2 LUN Statistics Enclosure Status Release Controller Toolkit Show Drives Drive Information Change Drive State Screen 2 Format Drives Controller Parameters Controller Diagnostics Screen 3 AEMI Scan Manual No 771965 5 7 Monitor Mode Main Title Screen Monitor Mode Main Title Screen MESSAGE STARTUP COMPLETE DACI6HS AWB Uer g777 CONFIGURATION ADMINISTRATION MYLEX Rev nnnn DAC960S nMB STARTUP COMPLETE Figure 5 5 Title Screen Display Table 5 2 Title Screen Description Indication Key Description MYLEX Manufacturer identification Rev nnnn Controller firmware revision level DAC960S Controller model number n MB Controller cache memory size
42. causes the controller to spin up all connected drives two at a time at six second intervals until every drive in the array is spinning The controller then interrogates each drive one at a time at six second intervals and confirms that the drive is ready for use The interrogation process repeats until all drives have been verified On Power This spin up mode assumes that all drives are already spinning and proceeds to interrogate the drives in the same manner as is described for Automatic mode On Command This spin up mode causes the controller to wait for a spin up command from the host It then proceeds to spin up the drives in the same manner as is described for Automatic mode Manual No 771965 8 39 Toolkit Menu Page Two Stripe Size The Stripe Size function is used to tune the controller performance for a specific environment or application Generally stripe size optimization is as follows Smaller stripe sizes provide better performance for random I O e g RAID 3 network RAID 5 network or OLTP processing Larger stripe sizes provide better performance for sequential transfers e g RAID 0 RAID 0 1 digital video etc The default setting is 8 optimum random I O performance and reduced sequential throughput Changing the stripe size to 16K 32K or 64K alters the way data is written on the drives connected to the DAC960SU controller WARNING DATA LOSS will occur after changing the stripe size on a co
43. drives can be connected to each SCSI channel controlled by the DAC960SU DAC960SU supports the Fast 20 Wide SCSI 3 Ultra SCSD standard which is backward compatible with earlier SCSI standards 2 2 DAC960SU Family User Guide Functional Description User Interface The primary user interface to the DAC960SUI is provided by the front panel keypad and LCD screen communicating through discrete components on the controller s main circuit board A second interface to the DAC960SUI is available through the RS 232 serial communications port on the controller s back panel distribution board The serial port can be used with either a VT100 compatible terminal or with a PC The PC may operate in either SLP mode or by using appropriate ASPI drivers and the DOS based DACCE EXE software utility Similarly RS 232 serial communications with the DAC960SU controller board can be achieved through the system backplane Memory Subsystem and DRAM Cache The DAC960SU be configured with up to 128 megabytes of DRAM cache depending on the type of memory modules being used A minimum of AMB DRAM is required The system supports adaptive read ahead device caching for optimum caching efficiency and I O performance A fast 32 bit interface between the 1960 CPU and the cache memory DRAM is provided by the Memory Control Unit MCU which is implemented in discrete programmable logic In addition to memory control and addressing functions the MCU pro
44. four seconds To access the utility through a 100 terminal send a break command On some terminals this is achieved by pressing the Ctrl and Break keys together On other terminals you may press the Enter or Return key refer to the documentation for your specific terminal or terminal emulation software The screen displays the Password prompt 4 7 Configuring the Array Note The password feature is not implemented in this version of the DAC960SU 3 Press Enter to clear the password prompt The Main Menu screen is displayed 8 96085 ANB Uer 77277 CONFIGURATION ADMINISTRATION OPTIONS 1 Get Configuration 2 Show Configuration 3 Create Array ENTER PARAMETER Enter option N for more options Esc for previous menu Configuration Administration Toolkit cfg adm tk nxt 4 8 DAC960SU Family User Guide Configuration Navigating Menus DAC960SUI Pressing the front panel button below a screen prompt such as cfg will cause a cursor arrow to appear next to the referenced selection Configuration Administration Toolkit cfg adm tk nxt 4 0000 H Pressing the Enter key will activate the selection Pressing the ESC key will display the previous screen Pressing the button below the nxt prompt will display underlying menu pages when they exist Pressing the button below a left or right arrow or a plu
45. is fully used Select SCSI Channel Create Array Page One 0 9605 AMB Uer 77727 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 3 1 Get Configuration 2 Show Configuration 3 Create Array ENTER PARAMETER INSTRUCTION Enter Channel Number INFORMATION Select the drives upto 8 for the Array lt Esc gt to end selection Channel n drvs ESC to end lt 2 Figure 6 5 Select SCSI Channel Create Array Page One 6 10 DAC960SU Family User Guide Configuration Menu Table 6 5 Create Array Page One Description Indication Key Description Channel n Number indicates the channel identification for the drive to be used in the array drvs ESC to end Prompt indicates user response options nnnnnn Number pairs indicate the SCSI address of each drive that comprise the array The first digit in each pair is the SCSI channel number The second digit in each pair is the SCSI ID number Note No information is displayed until the first physical drive is selected LCD Terminal Action Key Action Key ESC Esc 1 Cancels the function no array is created and displays the previous menu screen when no drives are selected for the array 2 Completes the SCSI channel selection function and displays the next page K3 Num keypad Increments channel number K4 Num k
46. loss or personal injury Contents Chapter 1 Introduction Description e cci tre eie pip p REIN 1 1 DACO960SUI Specific Description 1 1 Controller Functions and Features 1 2 New Features introduced with Firmware 2 5 and Above 1 2 Features Available with all Firmware Versions 1 2 Standard Package Contents 2 1 4 Soi C 1 4 User Supplied 1 4 DPSCHICALONS o RERO PRU ER 1 5 Chapter 2 Functional Description Controller Functions 2 1 Controller Components see 2 2 2 5 Multiple SCSI Format Support 2 5 SCSI Termination and Cabling Conventions 2 6 SCSI Address SCSI ID Selection 2 6 Drive Organization 0 Drive Groups etate EE ECHO IRL etaed Logical Units LUNS 2 1122 Configuration on RAID Management RAID Techniques enitn Rte PO HER Rats Striping Terminology eme Drive Management Controlling Physical Drive States Controlling Logical Unit States
47. number Enter Enter Invokes the selection sets the working Rebuild Parity Check Rate and displays the next page Manual No 771965 7 5 Administration Menu Page One Rate Setting Rebuild Check Rate Page Two 9 5 AHB Ver 777 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 1 Rebuild Check Rate 2 Start Rebuild 3 Start Parity Check NTER PARAMETER INSTRUCTION Press any key to continue INFORMATION Rebuild Check Rate set to 25 Rate set to nn Press any key Figure 7 3 Rate Setting Rebuild Check Rate Page Two 7 6 DAC960SU Family User Guide Administration Menu Table 7 3 Rebuild Check Rate Page Two Description Indication Key Rate set to nn Press any key Description Indicates the current Rebuild Parity Check Rate Prompt for user action to clear this status screen LCD Terminal Action Key Action Key Any key Any Displays the previous menu character key Manual No 771965 7 1 Administration Menu Page One Start Rebuild Function The Rebuild function is used after a drive has failed It restores the original information on a replacement drive Note Rebuilding a drive may impact controller performance Use the Rebuild Rate function to vary the priority that the controller allocates to the Rebuild process DACIGOS ANB Ver 277 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 2
48. returns the display to the previous menu K2 no N Cancels the function no configuration is saved and displays the previous menu screen Manual No 771965 6 37 Configuration Menu Page Three Configuration Menu Page Three 0809605 AWB 2777 CONFIGURATION ADMINISTRATION IMESSRGE OPTIONS 1 Start Initialize 2 Change Write Policy ENTER PARAMETER INSTRUCTION Enter option N for more options lt Esc gt for previous menu INFORMATION gt Start Initialize Change Write Policy int wpl 55 5 nxt Figure 6 19 Configuration Menu Page Three 6 38 DAC960SU Family User Guide Configuration Menu Table 6 19 Configuration Menu Page Three Description Indication Key Description Start Initialize Menu selection that allows user to initialize the logical units Change Write Policy Menu selection that allows user to select the cache write policy Write Through or Write Back that will provide the best performance for the array Indicator arrow marks active selection gt LCD Terminal Action Key Action Key ESC Esc Displays the previous screen main menu K1 int 1 Selects the Start Initialize function K2 2 Selects the Change Write Policy function K4 nxt N Selects the next page of Configuration menu selections Enter Enter Invokes the submenu or function indicated by the arrow Ma
49. sec 50 pin 3 m 10 fT 8 bit or 68 pin Wide SCSI 2 10 Mhz 20 MBytes sec 68 pin 3 m 10 ft 16 bit 5 Mhz 10 MBytes sec 6 m 20 ft Narrow SCSI 2 10 Mhz 10 MBytes sec 50 pin 3 m 10 ft 8 bit 5 Mhz 5 MBytes sec or 68 pin 6 m 20 ft SCSI 8 bit 5Mhz 5 MBytes sec 50 pin 6 m 20 ft or 68 pin 50 pin to 68 pin adapter required 3 meters with up to 4 SCSI devices or 1 5 meters with more than 4 SCSI devices Manual No 771965 2 5 SCSI Functions SCSI Termination and Cabling Conventions As SCSI data transfer rates increase maximum allowable cable lengths decrease For specific cabling requirements see Table 2 1 Note Strict adherence to guidelines for overall cable length is necessary when connecting Ultra SCSI drives that will operate at the higher data transfer rates of the FAST 20 standard refer to ANSI STD X3 131 for information on SCSI cabling requirements The DAC960SU supports active termination sometimes designated as alternative 2 or ALT 2 SCSI Address SCSI ID Selection Each drive on a specific SCSI channel or bus must have a unique target address SCSI ID which is different from all other devices on that channel The default SCSI ID for the DAC960SU is 0 It may be set to any address in the range of 0 15 that does not conflict with another device on the same SCSI channel Recall that most SCSI host bus adapters are typically set to SCSI ID 7 Note If the DAC960SU is connected to a n
50. that Mylex Corporation intends to announce provide or make available such Mylex products programming or services in your jurisdiction Requests for technical information about Mylex Corporation products should be made to your Mylex authorized reseller or Mylex marketing representative Mylex is a registered trademark and DAC960 is a trademark of Mylex Corporation HP and HP OpenView are trademarks of Hewlett Packard Corporation IBM and IBM PC are registered trademarks of International Business Machines Corporation Intel and 1960 are registered trademarks of Intel Corporation MS DOS is a registered trademark of Microsoft Corporation VT100 is a trademark of Digital Equipment Corporation Other names that are trademarks may be used herein for the purpose of identifying the products or services of their respective owners Unless otherwise noted companies names and data used in examples herein are fictitious Class Compliance THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS 1 THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE AND 2 THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC rules These limits are designed to provide reasonable protection against harmful interference in resi
51. the controller performs a rebuild operation automatically when a SCSI disk drive fails and both of the following conditions are true 1 A standby SCSI disk drive of identical or larger size is found attached to the same controller 2 Allofthe system drives that are dependent on the failed disk are con figured in a RAID 1 RAID 3 RAID 5 or RAID 0 1 logical unit During the automatic rebuild process system activity continues as normal System performance may degrade slightly however during a rebuild Note The priority of rebuild activity can be adjusted using the configuration utilities to adjust performance vs rebuild time Using Standby Rebuild To use the automatic standby rebuild feature it is necessary to always maintain a standby disk in the system A standby disk can be created in one of two ways 1 A disk may be labeled as standby using the Create Standby option under the Configuration menu 2 When the DAC960SU configuration is created or changed using the DACCF software utility all disks attached to the controller that are not assigned to a drive group will be automatically labeled as standby disks Standby Replacement Table A standby replacement table stores data on up to eight automatic replacement events in any session from one power on reset to the next power off reset When the limit of eight is reached and a disk failure occurs standby replacement can take place but is not recorded in the repl
52. to access the built in configuration and administration utility that resides in the controller s firmware Complete control and management of the array s physical drives and logical units can be performed from the front panel requiring no additional hardware or software drivers for that purpose This technical manual provides in quick reference form procedures that use the built in LCD panel to configure and operate the controller For additional information on using the LCD panel to configure and manage disk arrays see Configuration on page 4 1 Operating the Front Panel Controls The DAC960SUI front panel keypad buttons provide the user interface to the controller s functions Figure 4 2 The Alarm key resets the audible alarm The Enter key executes the selected functions The ESC key allows the user to go back to the previous screen at nearly any point in the menus The remaining four keys are defined by the Instruction Line the last line of the LCD display menus DAC960S C3 Host MYLEX Rev nnnn DAC960S n MB C Drive Cache E Figure 4 2 Front Panel Controls and Indicators Manual No 771965 4 5 Using the LCD Panel DAC960SUI only The LCD screen displays up to three menu items at a time The fourth line of the display shows an abbreviated list of functions that can be accessed by pressing the corresponding key below each one When a menu item is selected an arrow a
53. 2 nn terc nis hit eae Aan eet ttis 1 Data transfer capacity 1 DISK SUING iss dicerent Pos 1 E 1 at AM n 1 Logical Unit dee ad 1 RAID levels ertet n eet puma be unii 1 2 RAID 2 2 RAID Sh ince nein de dene eee 3 RAID 0 1 Mylex RAID 6 3 JBOD Mylex RAID 7 eene 3 Manual No 771965 xiii DAC960SU Family User Guide Chapter 1 Introduction Description The DAC960SU Ultra SCSI to Ultra SCSI Disk Array Controller brings RAID and Ultra SCSI functionality and performance to any computing platform equipped with a standard SCSI interface The DAC960SU is an intelligent caching controller that supports either industry standard RAID levels 0 1 3 5 and 0 1 for multiple drive arrays or single drive control functionality The DAC960SU provides high speed fault tolerant RAID disk operations for all popular operating environments Operating systems see the disk array as just another hard drive This document describes the DAC960SU internal board product and the DAC960SUI the DAC960SU board and enclosure Unless specified otherwise DAC960SU refers to both the DAC960SU and the DAC960SUI DAC960SUI Specific Description The DAC960SUT has a built in
54. 5 AWB Uer 9777 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 1 Start Initialize 2 Change Write Policy HTER PARAMETER INSTRUCTION it to Initialize LUM H to quit INFORMATION Initialize LUN 6 Initialize LUN n yes no Figure 6 21 Start Initialize Page Two 6 42 DAC960SU Family User Guide Configuration Menu Table 6 21 Start Initialize Page Two Description Indication Key Description Initialize LUN 4 n Prompt notifies the user that the function will initialize the LUN identified by the number shown LCD Terminal Action Key Action Key K1 yes Y Selection starts the initialization process and returns the display to the previous menu K2 no N Cancels the function no initialization is performed and displays the previous menu screen A Caution Pressing Yes will immediately begin the initialization function Initializing the wrong logical units can result in data loss Manual No 771965 6 43 Configuration Menu Page Three Initialize Status Start Initialize Page Three 96 05 MESSAGE INIT LUH 6 2 OPTIONS 1 4 Start Initialize 2 Change Write Policy NTER PARAMETER E INSTRUCTION Press any key to continue TMFORHATION Initialize started successfully AWB Wer 2797 CONFIGURATION Z ADMINISTRATION Initialize started Press any key Figure 6 22 Star
55. 551 Ardenwood Blvd Fremont CA94555 3607 USA 5 Channel RAID Controller DAC960SU 5 Fab 550117 Rev 1997 Conforms to the following Product Specification s EMC EN 50081 1 1992 EN 55022 1992 Class B EN 50082 1 1992 Generic Immunity EN 61000 4 2 1995 4k V CD 8kV AD EN 50140 1995 3 V m 80 1000 MHz 80 EN 61000 4 4 1995 0 5kV Power Supplementary Information The product herewith complies with the requirements to the EMC Directive 89 336 EEC Declaration that the equipment specified above conforms to the above directive s and standard s is on file and available for inspection at the manufacturer s address cited above Cc Community of Europe CE mark is rated for the DAC960SU as follows CISPR 22 Radiated Emission EN55022 5082 1 Generic immunity standard for the following 801 2 ESD IEC 801 3 Radiated IEC 801 4 EFT Burst Warning This is a Class B product In a residential environment this product may cause radio interference in which case the user may be required to take adequate measures Achtung Dieses ist ein Ger t der Funkst rgrenzwertklasse B In Wohnbereichen k nnen bei Betrieb dieses Ger tes Rundfunkst rungen aufreten in welchen Fallen der Benutzer f r entsprechende Gegenma nahmen verantwortlich ist Avertissement Cet appareil est un appareil de Classe B Dans un environnement r sidentiel cet appareil peut provoquer des brouillages radio lectriqu
56. 8 7 Select Channel Change Drive State Page Two Description Indication Key Description Channel 2 n Number indicates the SCSI channel of the drive that will change state LCD Terminal Action Key Action Key ESC Esc Displays the previous menu screen K3 Num keypad Increments channel number K4 Num keypad Decrements channel number Enter Enter Selects the drive channel for the drive that will change state and displays the next screen Manual No 771965 Toolkit Menu Page One Select Target Drive Change Drive State Page Three DACI6HS AHB Uer ann CONFIGURATION RDHIHISTRRTIUH MESSAGE OPTIONS gt 1 ONLINE 2 DEAD 3 STANDBY NTER PARAMETER INSTRUCTION Enter Target ID IMF RHMATIUHM Target ID n lt gt Figure 8 8 Select Drive Change Drive State Page Three 8 16 DAC960SU Family User Guide Toolkit Menu Table 8 8 Select Drive Change Drive State Page Three Description Indication Key Description Target ID n Number indicates the SCSI ID of the drive that will change state LCD Terminal Action Key Action Key ESC Esc Displays the previous screen K3 Num keypad Increments the drive SCSI ID number Num keypad Decrements the drive SCSI ID number Enter Enter Selects the drive to change state invokes the Change Drive State process and displays the next scre
57. ATA USE OR INCOME EVEN IF ADVISED OF SUCH DAMAGES IN ADVANCE Your sole remedies shall be as provided herein Returned Merchandise Procedures If you suspect that there is a defect in the material or workmanship of this PRODUCT you should contact the per son or company from which you purchased it That person or company may be able to solve the problem and if not will be able to contact us for technical assistance or repair If itis determined that the PRODUCT must be returned to MYLEX for repair or replacement a Return Merchandise Authorization RMA number must be obtained from MYLEX s Technical Department before it is returned Each returned item must have a separate RMA number P N 772058 D02 7 96 Printed in U S A The following rules apply to all returned items 1 The PRODUCT must be returned either in its original packaging or in other packaging which is appropriate for the PRODUCT and the manner of shipment and the RMA number must be displayed prominently on the outside of each such package 2 If a PRODUCT is determined to be ineligible for warranty service the customer will be notified before any fur ther action is taken with the PRODUCT 3 MYLEX will not be responsible for any loss or damage to property shipped with the RMA PRODUCT not origi nally sold by MYLEX e g coprocessor chips peripheral boards memory modules enclosures power supplies or any other accessories or attached items 4 Any item returned to
58. Action Key Action Key ESC Esc Cancels the drive SCSI channel and Target ID selection and displays the first page of the Create Standby menu K1 yes Y Confirms the standby drive selection and displays the previous menu screen K2 no N Cancels the drive SCSI channel and Target ID selection and displays the first page of the Create Standby menu Manual No 771965 6 35 Configuration Menu Page Two Save Configuration Function The Save Configuration function must be invoked whenever a configuration is created or changed in order for the configuration parameters to take effect AN Caution Data may be lost if the configuration is changed on an active array 96 05 AWB Wer 2797 CONFIGURATION Z ADMINISTRATION MESSAGE OPTIONS 3 1 Delete Last Array 2 Create Standby 3 Save ConFiguration NTER PARAMETER INSTRUCTION Press to save the configuration exit INFORMATION Saving the configuration will destroy the existing configuration Cur cfg will change yes no C Figure 6 18 Save Configuration Screen 6 36 DAC960SU Family User Guide Configuration Menu Table 6 18 Save Configuration Description Indication Key Description Cur cfg will change Prompt notifies the user that the function will change the current configuration LCD Terminal Action Key Action Key K1 yes Y Selection saves the current configuration and
59. B C1 000102 Press any key Figure 6 3 Show Configuration Page One 6 6 DAC960SU Family User Guide Configuration Menu Table 6 3 Show Configuration Page One Description Indication Key Description Ln Number indicates the currently displayed logical unit number LUN ON OF CR Indicates the status of the current logical unit ON on line CR critical OF off line n MB Number indicates the capacity in megabytes of the currently displayed logical drive 0 1 3 5 6 7 Number indicates the RAID level of the logical unit W x WT WB Indicates the setting of the on board write cache WT Write Through no write cache WB Write Back write cache enabled CI nnnnnn etc Number pairs indicate the SCSI address of each drive that comprise the logical unit The first digit in each pair is the SCSI channel number The second digit in each pair is the SCSI drive identification number SCSI ID Config loaded Indicates that current data is loaded into the controller s temporary work space Press any key Prompt to clear this status screen LCD Terminal Action Key Action Key ESC Esc Displays the previous screen K1 K4 Any Displays the configuration data for the next logical Enter character key drive or hot spare until all are shown then displays the previous menu Manual No 771965 6 7 Configuration Menu Page One Show Standby Show Configurat
60. C960SU Family 1 1 Daughter Board B 1 R RAID Levels 2 12 RAID Management 2 11 RAID Techniques 2 12 Rebuild Check Rate 7 4 Recycling the Battery C 13 Rules 3 7 3 11 S Save Configuration 6 36 6 50 SCSI Active Negation 8 37 SCSI Address Selection 2 6 SCSI Cabling 2 6 SCSI Formats 2 5 SCSI Functions 2 5 SCSI Termination 2 6 SCSI Transfer 8 39 Show Configuration 6 6 Show Drives 8 4 Show Standby 6 8 Specifications Battery Backup C 3 DAC960SU 1 5 Spin up 8 39 Standard Items 1 4 Standby Replacement Drives 2 21 Start Initialize 6 40 Start Parity Check 7 14 Start Rebuild 7 8 Stripe Size 8 40 Striping 2 13 Terminology 2 16 With Mirroring 2 16 With Parity 2 14 Manual No 771965 Super Read Ahead 8 38 T Termination 3 7 DAC960SU SCSI Channel 3 8 DAC960SUI SCSI Channel 3 18 Daughter Board B 3 Host Channel 3 4 Internal Disk Arrays 3 7 Toolkit Menu 8 1 U User Interface 2 3 5 1 User Supplied Items 1 4 V VT100 Terminal Configuration 4 3 VT100 Terminal Screens 5 4 Index 3 Index 4 DAC960SU Family User Guide MYLEX Mylex Corporation 34551 Ardenwood Blvd Fremont CA 94555 3607 U S A TEL 510 796 6100 FAX Domestic Sales 510 745 8016 International Sales 510 745 7521 www mylex com MADE IN U S A ffNILEX DAC960 Problem Report Customer Identification DAC960 Identification Name Company Address Country Phone Number Fax Number Date
61. CSI Cabling Rules Three things must be kept in mind while cabling the controller to the drives SCSI Bus Termination System Performance SCSI Cable Length Every SCSI channel needs to be properly terminated with an appropriate SCSI terminator as previously mentioned In general no drives should be terminated and all drives must be shunted to supply TERMPWR on the SCSI bus Note When connecting a Narrow SCSI 8 bit cable to any DAC960SU channel the controller must be at one end of the bus and Termination Enabled must be set for that channel To get the best performance from the controller the SCSI drives should be equally distributed across the SCSI channels and the controller s data transfer rate should be set to the optimum rate for the drives being used Note The SCSI transfer rate can be individually selected for each of the three channels on the DAC960SU For more information refer to the DACCF Configuration Utility manual Figure 3 6 shows disk drives connected to two channels and grouped across channels The drive not included in a group can be a standby drive available to either group The tape drive is connected to a separate channel from the disk drives 28 oooo008 Figure 3 6 Drive Grouping Example Manual No 771965 3 11 SCSI Cabling Rules Cable Lengths Generally speaking as SCSI data transfer rates increase maximum allowable c
62. DAC960SU Family User Guide Ultra SCSI to Ultra SCSI RAID Controllers DAC960SU amp DAC960SUI Manual Version 1 0 P N 771965 D01 DAC960SU Family User Guide Ultra SCSI to Ultra SCSI RAID Controllers DAC960 SU and DAC960SUI Manual Version 1 0 Part Number 771965 D01 Copyright 1997 Mylex Corporation All Rights Reserved All contents of this manual are copyrighted by Mylex Corporation The information contained herein is the exclusive property of Mylex Corporation and shall not be copied transferred photocopied translated on paper film electronic media or computer readable form or otherwise reproduced in any way without the express written permission of Mylex Corporation This Manual describes the Mylex DAC960SU Family Ultra SCSI to Ultra SCSI Disk Array Controller Although reasonable efforts have been made to assure the accuracy of the information contained herein this publication could include technical inaccuracies or typographical errors Mylex Corporation expressly disclaims liability for any error in this information and for damages whether direct indirect special exemplary consequential or otherwise that may result from such error including but not limited to loss of profits resulting from the use or misuse of the manual or information contained therein even if Mylex Corporation has been advised of the possibility of such damages Any questions or comments regarding t
63. Diag Page One Table 8 18 Run Diagnostics Confirmation Page One Description Indication Key Description Run Diagnostics Prompt indicates that the function will start the Controller Diagnostics program LCD Terminal Action Key Action Key K1 yes Y Selection runs the diagnostic program K2 N Cancels the function no diagnostics are run and displays the previous menu screen Manual No 771965 8 41 Toolkit Menu Page Two Diagnostics Status Controller Diag Page Two DAC96OHS AWB Uer 22777 CONFIGURATION Z ADMINISTRATION MESSAGE OPTIONS 1 Format Drives 2 Controller Parameters 3 Controller Diagnostics HTER PARAHETER E IHSTRUCTIUH Press any key to continue INFORMATION Diagnostics passed Diagnostics passed failed nnnn Press any key Figure 8 19 Diagnostics Status Controller Diag Page Two 8 42 DAC960SU Family User Guide Toolkit Menu Table 8 19 Diagnostics Status Controller Diag Page Two Description Indication Key Description Diagnostics message Message indicates the results of the controller diagnostics check Passed indicates all parameters tested were within specified norms Failed indicates the parameter identified by the error code is out of tolerance nnnn Error code identifies out of tolerance condition found by the diagnostic program Press any key Prompt for user action to clear this status s
64. ESC Esc Cancels the function no standby drive is created and displays the previous menu screen K3 Num keypad Increments the Target ID number K4 Num keypad Decrements the Target ID number Enter Enter Invokes the standby drive selection and displays the next screen Manual No 771965 6 33 Configuration Menu Page Two Confirm Standby Drive Create Standby Page Three 8 9685 ANB Uer 77277 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 2 1 Delete Last Array 2 Create Standby 3 Save Configuration ENTER PARAMETER INSTRUCTION Enter Channel Number INFORMATION Sby 0 3 Cap nnn yes no Figure 6 17 Standby Drive Confirmation Create Standby Page Three 6 34 DAC960SU Family User Guide Configuration Menu Table 6 17 Create Standby Page Three Description Indication Key Description Sby n Number indicates the SCSI channel number of the drive to be made a standby hot spare n Number indicates the SCSI identification of a drive to be made a standby hot spare Cap nnn MB Indicates maximum drive capacity in megabytes available for the standby drive being created SBY size too small Prompt notifies the user if the capacity of the standby drive is too small to be used in the existing configuration If a drive failure were to occur the Standby drive may not take over LCD Terminal
65. Figure 5 3 Main Menu Display Each of the three menu choices that can be selected from the main menu screen will produce subordinate screens that invoke different functions for configuring and managing the SCSI disk array These functions produce additional screens and most of those screens also invoke commands associated with their specific functions The principal main menu command selections and the submenu commands that invoke additional submenus or command functions are shown in Table 3 1 and are described throughout the subsequent chapters of this manual Navigating the VT100 Terminal Screens By connecting a VT100 compatible terminal or a PC operating in an equivalent terminal emulation mode all controller monitoring configuration and administration functions can be exercised from the 100 terminal 0 9605 AWB Uer 27727 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 Get Configuration 2 Shou Configuration 3 Create Array ENTER PARAMETER 8 INSTRUCTION Enter option N for more options lt Esc gt for previous menu INFORMATION Figure 5 4 Menu Mode VT100 Utility Screen 5 4 DAC960SU Family User Guide User Interface Access to the DAC960SUI built in utility screens is achieved by sending a Break character from the VT100 terminal keyboard On some terminals this is achieved by pressing the Ctrl and Break keys together and some terminal emulation modes may also
66. ING This unit contains electronic components that are sensitive to electrostatic discharge ESD handling precautions are required 1 Remove from the top of the unit the four screws that secure the top cover front panel assembly and carefully lift off the assembly refer to Figure 2 2 AN Caution Be careful not to damage the cables connecting the LCD panel and the cooling fan when removing the top cover assembly Figure 3 9 Removing the DAC960SUI Controller Top Cover 2 Configure the termination settings according to the instructions in Setting SCSI Channel Termination on page 3 8 3 18 DAC960SU Family User Guide Installation DAC960SUI Physical Installation Procedure 1 Mount the DAC960SUI controller into the enclosure following the procedures described in the documentation for that enclosure Note Standard mounting holes that are located on both sides and on the bottom of the DAC960SUI controller accept No 6 32 coarse thread screws AN Caution DO NOT block the cooling fan outlet at the top of the DAC960SUI Allow sufficient space above the fan outlet for proper ventilation or equipment malfunction may occur 2 Connect the cables from the drives or array enclosures to the Distribution Board Drive Channel 0 connector and or the Drive Channel 1 connector refer to the appropriate illustration and table in Appendix A of this manual for your specific Distribution Board Note The DAC960SUI contro
67. Jumper settings that determine the DAC960SU hardware configuration should be checked prior to installing the controller in its enclosure These jumper shunts may be difficult to change after the controller is installed Inspect the jumpers on the Distribution Board or backplane to make sure the Host Channel SCSI ID and all other settings are properly configured for your installation See Typical Jumper Settings that follows Note Default Host Channel setting is SCSI ID 0 Bits 0 1 2 and 3 are Clear The DAC960SU supports SCSI host addresses from 0 to 15 Determine the SCSI termination requirements for your installation Refer to Setting SCSI Channel Termination on page 3 8 Note Default termination settings are Enabled for all SCSI channels on the DAC960SU controller Typical Jumper Settings This procedure uses the Mylex DBX960S 3 FS distribution board as an example for making jumper settings Jumpers on this distribution board control the host channel SCSI ID and the communications port protocols refer to Figure 3 1 Table 3 1 and Figure 3 2 Table 3 2 and Table 3 3 for the distribution board configuration jumper locations and shunt settings 3 4 DAC960SU Family User Guide Installation P1 49 4 J10 J11 J12 Figure 3 1 DBX960S 3 FS Horizontal Distribution Board Table 3 1 Distribution Board Connectors and Jumper Identification
68. Main Title Screen 5 8 Menu Mode Log in Password 5 9 Menu Mode Main Menu Screen 5 10 Chapter 6 Configuration Menu Configuration Menu 6 1 Configuration Menu Page 2 6 2 Get Configuration Screen 6 4 Show Configuration Page One 6 6 Create Array Function 2 6 10 Configuration Menu Page TWO seem 6 26 Delete Last Array Function 2 2 6 28 Create Standby Function esee 6 30 Save Configuration Function 2 6 36 Configuration Menu Page Three 6 38 2 gt eee ehe e 6 40 Change Write 0 4 4 111 6 46 Save Configuration Prompt Configuration Menu Alternate Screen 6 50 Initialize Logical Unit Prompt Configuration Menu Alternate Screen 6 52 Chapter 7 Administration Menu Administration Menu Summary seem 7 1 Administration Menu Page One see 7 2 Rebuild Check Rate essen 7 4 Start Rebuild Function 2 7 8 Start Parity Check eene ie terere eel 7 14 Administration Me
69. Model Invoice Number Serial Number Chnls Cache Firmware Ver BIOS Ver Make Model Size Type of Drives Disk Non Disk Purchase Date System Information Motherboard Video Adapter Operating Sys Pack Configuration CPU Speed Network Card Other Disk Ctr BIOS Ver __ MB Memory ___ Other Cards System Drive Configuration Indicate in matrix below 1 2 for member of pack 1 pack 2 respectively Indicate S T C or O for Standby Tape CDROM and other drives System Size RAID Write Drive Level Back Thru Channel SCSI ID 213 4 Problem Description This DPR form has been included with your Mylex product as a convenience to both you and our Technical Services Department If filled out completely this will greatly assist Mylex personnel in quickly resolving any technical problems or questions you may have Use the Mylex fax number 510 745 7715 to transmit this form to the Technical Services Department or mail to Mylex Corporation Technical Services Department 34551 Ardenwood Blvd Fremont CA 94555 3607 772014 DAC Mylex Warranty Customer Policy Thank you for purchasing this Mylex product for your computer system In addition to this high quality product your purchase entitles you to the warranty coverage set forth herein In order to provide this warranty coverage
70. One Get Configuration Screen 0 9605 ANB Uer 7727 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 1 Get Configuration 2 Show Configuration 3 Create Array ENTER PARAMETER INSTRUCTION Press any key to continue INFORMATION Configuration loaded successfully Config loaded Press any key Figure 6 2 Get Configuration Screen 6 4 DAC960SU Family User Guide Configuration Menu Table 6 2 Get Configuration Description Indication Key Description Config loaded Indicates that current data is loaded into the controller s temporary work space Press any key Prompt to clear this status screen LCD Terminal Action Key Action Key Any key Any Displays the previous screen character key Note Always invoke the Get Configuration function before performing any array management task from the Configuration submenu The Get Configuration command assures that the DAC960SU controller temporary work space contains the current configuration data Manual No 771965 6 5 Configuration Menu Page One Show Configuration Page One 8 9605 Li MEA CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 2 1 Get Configuration 2 Show Configuration 3 Create Array ENTER PARAMETER Press any key to continue LUN 0 ONLINE 228 MB RAIDS Write Back Drives 8 8 8 1 8 5 Sectors 8 233572 LO ON 500MB R5W
71. Peripherals L Color Monitor LI Monochrome Monitor 7 What add ons or peripherals are you most considering for future purchase What best describes your occupation 1 Management Administration LI Sales Service LJ Technical Scientific Engineering LI Student LJ Other 9 Do you have any comments or suggestions oo P N 772058 D02 7 96 Printed in U S A Place Postage Here MYLEX Mylex Corporation Customer Service Dept 34551 Ardenwood Blvd Fremont CA 94555 3607
72. Reset COMM 73 Drive Channel 2 Fault 6 34 Alarm 74 Drive Channel 2 Fault 5 35 Alarm Reset 75 Drive Channel 2 Fault 4 36 COMM Carrier Detect 76 Drive Channel 2 Fault 3 37 COMM Receive Data 77 Drive Channel 2 Fault 2 38 COMM Transmit Data 78 Drive Channel 2 Fault 1 39 COMM Data Terminal Ready 79 Drive Channel 2 Fault 0 40 Ground 80 Header Power Not used Manual No 771965 A 5 General Identification J6 x O J10 4 1 1 1 1 1 Deer 22222222 J12 J13 J 4 J15 J7 Figure A 5 DBX960S 6 FWR Wide SCSI Distribution Board Table A 5 Wide SCSI 6 Ch Distribution Board Connectors Jumper Connector Description J1 Fast Wide SCSI Connector Drive Channel 2 J2 Fast Wide SCSI Connector Drive Channel 0 J3 Fast Wide SCSI Connector Drive Channel 3 J4 Fast Wide SCSI Connector Drive Channel 1 J5 Fast Wide SCSI Connector Host Channel 1 Drive Channel 4 J6 Jumpers SCSI ID and Configuration J7 Fast Wide SCSI Connector Host Channel 0 J8 Power Connector J9 Fault Indication Drive Channel 4 see Table A 11 J10 AEMI Array Enclosure Management Interface Port see Table A 12 J11 Power Connector J12 Serial Port J13 Fault Indication Drive Channel 1 see Table A 11 J14 Fault Indicatio
73. Return key again to display the Menu Mode screen For more information using the VT100 terminal refer to Configuration on page 4 1 Manual No 771965 4 3 Using VT100 Terminal Operating the VT100 controls Up to three menu items are displayed in the panel below the OPTIONS prompt Respond to the on screen prompts to select the desired configuration administration or diagnostic functions Typing the number associated with a menu item in the OPTIONS panel such as 1 causes the number to appear next to the ENTER PARAMETER prompt The Enter key activates the selected function or sub menu The n key accesses the next page of a menu when there are more than three items to list The information below the INSTRUCTIONS prompt shows an abbreviated list of other functions and the corresponding key to press for accessing each one The ESC key allows the user to go back to the previous screen at nearly any point in the menus DAC960S AWB Uer 27727 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 Get Configuration 2 Shou Configuration 3 Create Array ENTER PARAMETER 8 INSTRUCTION Enter option N for more options lt Esc gt for previous menu INFORMATION Figure 4 1 Menu Mode VT100 Utility Screen 4 4 DACO960SU Family User Guide Configuration Using the LCD Panel DAC960SUI only The front panel keypad and LCD are connected to the DAC960SU controller board
74. SCSI ID number LCD Terminal Action Key Action Key ESC Esc Quits the function before the array is created A prompt screen to Exit or Continue is displayed see Figure 6 12 and Table 6 12 lt e Moves cursor to the left below the drive capacity numbers K2 gt gt Moves cursor to the right below the drive capacity numbers K3 Num keypad Increments number above the cursor position K4 Num keypad Decrements number above the cursor position Enter Enter Completes the size selection for this LUN and displays the next page Note All available capacity must be used when configuring the DAC960SU with the LCD panel or VT100 terminal It is not necessary to initialize unneeded LUNs however To define an array without configuring all available capacity use the DACCF software utility Manual No 771965 6 17 Configuration Menu Page One Write Cache Mode Create Array Page Five 8 9685 AWB Uer 2777 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 Get Configuration 2 Show Configuration 3 Create Array ENTER PARAMETER INSTRUCTION Hit spacebar to toggle write policy other to continue INFORMATION Write policy of LUN 6 Write Through Selected Drives CHN TGT 6 6 8 1 6 3 Write policy LN n Wx 000102 chg Figure 6 9 Write Cache Mode Create Array Page Five 6 18 DAC960SU Fami
75. Termination Termination Enabled IDE Termination 4 Enabled Figure 3 3 Example of Termination with the DAC960SU or DAC960SU Manual No 771965 3 7 SCSI Termination Rules Setting SCSI Channel Termination SCSI termination jumpers are found near the front edge of the DAC960SU disk array controller board These jumpers labeled J6 control the termination and term power for each of the controller s SCSI channels Set the DAC960SU controller board J6 jumper shunts to the proper single ended termination for each SCSI channel refer to Figure 3 4 Table 3 4 Figure 3 5 and Table 3 5 for jumper location and shunt settings 536770 2 0 23 8 gt 1960 gt 530770 P1 wn 2 lt 53C770 Figure 3 4 DAC960SU Controller Board Diagram The SCSI bus must be terminated at both ends of the cable Typically one end is terminated at the host bus adapter and the other end is terminated on the last device or on its enclosure Note When using Differential SCSI external termination must be provided and the controller s on board termination must be disabled 3 8 DAC960SU Family User Guide Installation Table 3 4 DAC960SU Controller Board Connectors and Jumper Identification Connector Description J1 LCD Panel Interface J2 Batt
76. able lengths decrease Transfer rates of 5 MB sec for 8 bit SCSI or 10 MB sec for 16 bit SCSI will normally allow a 6 meter 20 foot maximum cable length on a channel Transfer rates of 40 MB sec for 16 bit Ultra SCSI permit a maximum cable length of only 1 5 meters if more than 4 devices are on the channel Note Strict adherence to guidelines for over all cable length is necessary when connecting Ultra SCSI drives that will operate at the higher data transfer rates of the Fast 20 standard refer to ANSI STD X3 131 for information on SCSI cabling requirements Table 3 6 Supported SCSI Formats and Cable Lengths SCSI Type Clock Rate Data Rate Connector Cable Length Ultra SCSI 20 Mhz 40MB sec 68 pin 3m 10 ft T 16 bit Ultra SCSI 20 Mhz 20MB sec 68 pin or 3m 10 ft T 8 bit 50 pin Wide SCSI 2 10 Mhz 20 MB sec 68 pin 3 m 10 ft 16 bit 5 Mhz 10 MB sec 6 m 20 ft Narrow SCSI 2 10 Mhz 10 MB sec 68 pin or 3 m 10 ft 8 bit 5Mhz 5 MB sec 50 pin 6 m 20 ft SCSI 8 bit 5 Mhz 5 MB sec 50 pin 6 m 20 ft 3 12 50 to 68 pin adapter required T3 meters with up to 4 SCSI devices or 1 5 meters with more than 4 SCSI devices DAC960SU Family User Guide Installation DAC960SU Physical Installation Procedure 1 Connect the DAC960SU controller to the distribution board Figure 3 7 Controller and Distribution Board Installation 2 Mount the controller distribution
77. acement table The standby replacement table can be cleared from the DAC960SU by using the Save Configuration option under the Configuration menu Manual No 771965 2 21 Drive Management Hot Swap Drive Replacement The DAC960SU supports the ability of certain drive enclosures to perform a hot swap drive replacement while the system is on line A disk can be disconnected removed or replaced with a different disk without taking the system off line The SCSI bus termination must be arranged so that a drive can be removed without disrupting the termination scheme Disk Failure Detection The DAC960SU controller automatically detects SCSI disk failures monitoring process running on the controller checks among other things elapsed time on all commands issued to disks A time out will cause the disk to be reset and the command will be retried If the command time out occurs again the disk will be killed by the controller that is its state changed to dead The DAC960SU controller also monitors SCSI bus parity errors and other potential problems Any disk with too many errors will be killed by the controller Disk Media Error Management The DAC960SU controller manages SCSI disk media errors in a manner transparent to the user Disks are programmed to report errors When a disk reports a media error during a read the controller reads the data from the mirror RAID 1 or RAID 0 1 or computes the data from the other blocks RAID
78. advantage of RAID 0 1 is its 50 utilization capacity if all drives are the same size Disk 2 Stripe 2 Sectors 20 2F Stripe 1 Sectors 10 1F Disk 0 Disk 1 Stripe 0 Stripe 1 Sectors A F Sectors 10 1F Stripe 2 Stripe 0 Sectors 20 2F Sectors A F Stripe 3 Stripe 4 Sectors 30 3F Sectos 40 4F Stripe 5 Sectors 50 5F Stripe 5 Sectors 50 5F Stripe 3 Sectors 30 3F Stripe 4 Sectos 40 4F Figure 2 11 Striping with Mirroring RAID 0 1 Standard Striping Terminology Stripe Width The number of drives within a drive group is referred to as the stripe width Stripe Order The order in which SCSI drives appear within a drive group is the stripe order It is critical that the selected stripe order is always maintained to assure data integrity and the controller s ability to rebuild failed drives Stripe Size The size of the logically contiguous data block recorded on each drive within a logical unit is the stripe size The default is 8 KBytes Other choices are 16 32 or 64 KBytes which may be selected from the Toolkit Menu on the control panel or from the DACCF configuration utility Advanced Functions menu Physical Parameters option Larger stripe size ensures better performance for large sequential data transfers Smaller stripe size is best suited for small random data transfers 2 16 DAC960SU Family User Guide Functional Description Drive Manag
79. an detected a change in the number of drives present on the tested SCSI channel LCD Terminal Action Key Action Key Any key Any character key Invokes the AEMI Scan function and displays the previous menu Manual No 771965 8 47 Toolkit Menu Page Three 8 48 DAC960SU Family User Guide Distribution Boards DAC960SUI Identification DAC960SUI is manufactured in different configurations that support Fast Wide or Differential SCSI channels from its back panel Distribution Board A Distribution Board may also provide additional host drive channel capability if the DAC960SUI is equipped with DBI960SU daughter board option A product identification label located on the top of the controller provides specific information for each DAC960SUI This label is the definitive source of product identification information for installation or technical support issues Note Since most models are similar in their outside appearance visual identification of a specific model controller can be difficult Don t guess Read the label Figure A 1 Controller Identification Label Manual No 771965 1 DACO960SUI Identification Table A 1 Controller and Distribution Board Identification by Part Number DAC960SUI SCSI Channels DBX960S Controller Host Drives Distribution Part Number Board Qty Type Qty Type Part Number DAC960SUI 2Dn 1 Ultra 2 U
80. and a 47 ohm resistor It typically generates a constant charge at the rate of 40mA when a 2 4V battery is used External Battery When an external battery is connected to the DBB960S the on board battery pack is disconnected the internal battery harness is removed from JP2 and replaced by the external battery harness and thereby has no effect The external battery pack should use the mating plug Molex P N 51004 0300 which connects to the receptacle Molex P N 53015 0310 on the BBU module Pin 3 on the connector provides a 40mA trickle charge current for a 2 4V battery Charging current will vary for different battery voltages This charging circuit may be used by connecting Pins 1 and 3 to the positive lead C 6 DAC960SU Family User Guide Battery Backup Unit on the battery pack If an external charging circuit is used Pin 3 should be left disconnected AN Caution Damage to either the battery pack or the system could occur if the trickle charge current exceeds the current specified by the battery pack manufacturer Table C 4 Battery Connector Pin Definitions Pin Label Description 1 VB Positive Voltage from Battery GND Ground VCharge Trickle Charge Current 40mA 2 4V Manual No 771965 C 7 Installation Installation The DBB960S module when installed at the factory will be securely attached to the DAC960SU using insulated hardware Electrical connection will be through Connector J2 on bo
81. ard the DAC960SU The following illustrations show the different mounting locations for the battery backup module i060 TO P1 s 42 JP2 JP1 DBB960S J2 ON DAC960S Figure C 3 Location of J2 on DAC960SU Mechanical Installation Procedure Perform the mechanical installation procedure described in this section if the DBB960S was not installed onto the DAC960SU at the factory Tools Needed The only tools needed for installation of the DBB960S Battery Backup module are a 1 Phillips screwdriver and a small flatblade screwdriver DAC960SU Family User Guide Battery Backup Unit Procedure 1 Power off the system and remove the DAC960SU controller according to the instructions for the system enclosure AN Caution Be sure to use proper electrostatic protection procedures when removing the DAC960SU controller from the system 2 Remove the loopback plug from the controller s battery backup connector J2 Store the loopback plug in a safe place It may be needed again if the battery backup module is taken out of service Notice that the loopback plug is installed so the printing is right side up when the DAC960SU is oriented with J2 at the top Loopback Block for BBU Plug Je Hold Down Bracket 1 DRAM SIMM ERE
82. are is available or the administrator can manually initiate a rebuild Drawbacks Cannot match RAID write performance because of the processing required to compute and write error correction data While the controller is rebuilding a drive users will experience reduced performance if they try to read or write data to the logical unit RAID 0 1 Mylex RAID 6 Combines the benefits of disk mirroring RAID 1 and data striping RAID 0 Benefits Optimizes for both fault tolerance and performance Provides excellent performance for all data needs Drawbacks Requires half the available disk space for data redundancy just like RAID 1 JBOD Mylex RAID 7 The controller treats a single drive as a stand alone disk and provides a high performance cache Benefits Cache reduces the amount of time the computer has to wait for a disk to get to the right place to read or write data Drawbacks Does not provide data redundancy and does not use striping for performance enhancements Manual No 771965 Glossary 3 Glossary 4 DAC960SU Family User Guide Administration Menu 7 1 AEMI 1 1 AEMI Connector A 13 AEMI Scan 8 44 Automatic Rebuild Management 8 37 B Battery and Charge Circuit C 6 Battery Backup 2 24 C 1 Battery and Charge Circuit C 6 Connectors and Indicator C 1 Functional Description C 5 Installation C 8 Operation C 1 1 Product Description C 1 Removing C 12 Specifications C 3 Status Indica
83. arrow 8 bit SCSI channel its SCSI ID must be set between 0 7 On the drive channels the DAC960SU is SCSI ID 7 Subsequently you must assign to each disk drive connected to the DAC960SU a unique SCSI address ranging from 0 through 6 2 6 DAC960SU Family User Guide Functional Description Drive Organization The DAC960SU controller organizes the SCSI drives connected to it as drive groups and logical units Drive Groups Using the DAC960SU up to eight 8 individual disk drives be used together to form a pack or drive group of physical drives that will comprise the array s logical unit capacity Note If all of the disks in a drive group are not the same size the drive group will effectively have the capacity of the multiple of the smallest drive To determine the total size of a drive group multiply the size of the smallest disk in the drive group by the number of disks in the group For example if there are four drives of 4 GB each and one drive of 2 GB comprising a drive group the effective capacity available for use is 10 GB 5 x 2 not 18 GB Note Capacity to the system depends on the RAID type For example 5 drives of 4 GBytes each in a RAID 5 array would have a capacity of 16 GBytes In a RAID 0 1 array the same number of drives would only have a capacity of 10 GBytes The DAC960SU supports up to eight 8 drive groups Manual No 771965 2 7 Drive Organization Logical Units LUNs
84. ast position O Online S Spare D Dead W Unconfigured drive LN nnn Numbers indicate the first logical unit associated with each drive represented directly above Press any key Prompt for user action to clear this screen LCD Terminal Action Key Action Key ESC Esc Displays the previous screen K1 K4 Enter Any Displays the screen for the next SCSI channel until character key all are shown Manual No 771965 8 5 Toolkit Menu Page One Drive Information 96 05 AWB Uer 22772 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 2 Show Drives 1 2 Driue Information 3 Change Drive State HTER PARAMETER INSTRUCTION Enter Channel Number TMFORMATION Channel n e gt Figure 8 3 Drive Information Page One 8 6 DAC960SU Family User Guide Toolkit Menu Table 8 3 Drive Information Page One Description Indication Key Description Channel 2 n Number indicates the SCSI channel of the drive about which to display information LCD Terminal Action Key Action Key ESC Esc Displays the previous menu screen K3 Num Keypad Increments the channel number K4 Num Keypad Decrements the channel number Enter Enter Selects the drive channel of the drive about which to display information and displays the next screen Manual No 771965 8 7 Toolkit Menu Page One
85. ate E IHSTRUCTIUH Press any key to continue IHF RHATIUH Vendor MAXTOR Model 7345 SCSI Revision 2665 Capacity 329 Soft Errors Mfr name Model No Rev nnn MB SEr n Press any key Figure 8 5 Drive Information Page Three 8 10 DAC960SU Family User Guide Toolkit Menu Table 8 5 Drive Information Page Three Description Indication Key Description Mfr name Name of the drive manufacturer Model No Manufacturer s model number for the drive Rev Manufacturer s revision number for the drive nnn MB Numbers indicate the capacity in megabytes of the drive Ser n Number indicates the number of soft errors attributed to this drive Press any key Prompt for user action to clear this screen LCD Terminal Action Key Action Key Any key Any Displays the previous screen character key Manual No 771965 Toolkit Menu Page One Change Drive State The Change Drive State function is used to recover from accidental drive state changes If a user changes a failed drive to an On line state by mistake data integrity may be compromised WARNING Changing the state of a drive can result in data loss Dbhc96 s AHB Uer ana CONFIGURATION RDHIHISTRRTIUH MESSAGE OPTIONS 1 ONLINE 2 DEAD 3 STANDBY NTER PARAMETER IHSTRUCTIUH Enter option for more options lt Esc gt fo
86. be ONLINE CRITICAL or OFF LINE Notice that the same term on line is used for both physical drives and logical units Note I O operations can be performed only with logical units that are either on line or critical On line A logical unit is on line if all of its participating physical drives are on line Critical A logical unit is considered critical when any failure of another of its physical drives may result in a loss of data A logical unit is critical if it meets both of the following conditions 1 Itis configured for RAID 1 RAID 3 RAID 5 or RAID 0 1 2 No more than one of its physical drives is not on line Off line An off line logical unit is one on which no data can be read or written No operations can be performed on off line logical units System commands issued to off line logical units are returned with an error status A logical unit can be off line under one of two conditions 1 Itis configured with a redundant RAID level 1 3 5 or 0 1 and two or more of its SCSI drives are not on line 2 Itis configured as RAID 0 or JBOD or in a spanned set and one or more of its SCSI drives are not on line 2 20 DAC960SU Family User Guide Functional Description Controlling Standby Replacement Drives Hot Spares The standby replacement drive or hot spare is one of the most important features the DAC960SU controller provides to achieve a high degree of fault tolerance With the standby rebuild function
87. be deleted ext cnu Figure 6 12 Exit Continue Configuration Create Array Alternate Screen 6 24 DAC960SU Family User Guide Configuration Menu Table 6 12 Exit Continue Alternate Screen Description Indication Key Description Aray will be deleted Message indicates that all target ID size and RAID level configuration data for all LUNs defined during this Create Array session will be deleted if ext is selected LCD Terminal Action Key Action Key K1 ext Y Selection exits the function deletes the LUNs from this array and displays the previous menu No array is created K1 cnu N Selection continues the Create Array function so that LUN definitions may be modified or saved Manual No 771965 6 25 Configuration Menu Page Two Configuration Menu Page Two DLP Ln MESSAGE OPTIONS 1 Delete Last Array 2 Create Standby 3 Save Configuration ENTER PARAMETER INSTRUCTION Enter option N for more options lt Esc gt for previous menu INFORMATION MB Uer 227273 CONFIGURATION ADMINISTRATION 6 26 Delete Last Array Create Standby Save Configuration del sby sav nxt Figure 6 13 Configuration Menu Page Two DAC960SU Family User Guide Configuration Menu Table 6 13 Configuration Menu Page Two Description Indication Key Description Delete Last Array Menu selection that a
88. ble Message indicates the current parameter state LCD Terminal Action Key Action Key ESC Esc Cancels the function If changes were made it displays the save parameters screen otherwise it displays the previous menu screen K3 chg Spacebar Changes the current parameter selection Enter Enter Records the current parameter selection to the controller s temporary working space and displays the next parameter until all have been shown Manual No 771965 Toolkit Menu Page Two Save Changes Controller Parameters bare na8s AWB Uer see CONFIGURATION Z ADMINISTRATION MESSAGE OPTIONS 2 1 Format Drives 2 Controller Parameters 3 Controller Diagnostics PARAMETER TMSTRUCTION Press to save the configuration H to quit IHF RHATIUH Controller parameters have been changed Parameters changed Save sav ext Figure 8 17 Save Controller Parameters 8 34 DAC960SU Family User Guide Toolkit Menu Table 8 17 Save Controller Parameters Description Indication Key Description Parameters changed Function that loads the current saved configuration data into the controller temporary work space Save Menu selection that allows user to review the current configuration data LCD Terminal Action Key Action Key K1 sav Y Selection changes the controllers working parameters and saves the new settings to the controlle
89. board assembly into the enclosure Follow the procedures described in the documentation for that enclosure Note Standard 0 125 inch mounting holes suitable for insulated stand offs are located in four places on both the DAC960SU controller and the DBX960S distribution board Enable Disable termination for each of the SCSI channels See Termination Jumpers later in this document for jumper locations and settings A Caution Be sure to allow sufficient space above the top of the DAC960SU for proper ventilation or equipment malfunction may occur 3 Connect the cables from the drives or array enclosures to the distribution board Drive Channel 0 connector J8 and or the Drive Channel 1 connector J9 Cable drives to disk channel 0 78 and channel 1 J9 Manual No 771965 3 13 SCSI Cabling Rules 4 5 3 14 Note The DAC960SU controller drive channels permanently set for SCSI ID 7 Each drive on a SCSI channel must be set to a unique ID number between 0 and 6 Drives may also be configured to supply termination power to the SCSI bus Connect the host system SCSI interface cable to the distribution board Host connector J11 Note Do not connect the Wide SCSI 16 bit host channel to a Wide SCSI 16 bit host adapter with a Narrow SCSI 8 bit cable The two devices will negotiate for Wide SCSI communications and then lock the system because the Wide communications path does not ex
90. boards with the exception of the DBX960S 6 UDR which has a different Fault and Status port Manual No 771965 General Identification Table A 13 Power Connectors Distribution Board Pin Description 1 12V DC 2 Ground 3 Ground 4 45V Vcc AN Caution Both power connectors must be connected to a power supply except DBX960S 3 UDR and DBX960S 6 UDR Distribution Boards Table A 14 Fan Power Outlet Connector JP 1 Distribution Board Pin Description Position 1 5V DC Left Not Used 12V DC Center Ground Right Note To prevent overheating of components within the controller assembly set fan polarity so air is blowing OUT of the outlet hole during operation A 14 DAC960SU Family User Guide DBI960SU Daughter Board Product Description The DBI960SU is a three channel upgrade that connects to the DAC960SU in a daughter board configuration This provides three additional Ultra SCSI channels without having to install an additional DAC960SU controller One of the three added channels can be configured either as a second host channel or as a drive channel The other remaining SCSI channels are drive channels only Requirements For proper operation the daughter board option requires a DAC960SU controller and one of three available six channel distribution boards narrow wide or differential SCSI
91. by different displays on the front panel LCD or terminal monitor display These modes are Start up Monitor mode Menu mode Navigating the LCD Screens DAC960SUI only A touch control keypad and a liquid crystal display LCD mounted on the front panel of the DAC960SUI is the primary operational interface and monitor display for the disk array controller This user interface controls all configuration and management functions for the DAC960SUI controller and for all SCSI disk array subsystems to which it is properly connected ffNNILEX DAC960S C3 Host MYLEX Rev nnnn DAC960S C3 Drive LC Cache Alarm 50000 Figure 5 1 DAC960SUI Front Panel Keypad and LCD The LCD provides a system of screens with areas for information status indication or menus The LCD screen displays up to three lines at a time of menu items or other information The fourth line of the display shows controller status in Monitor mode In Menu mode the fourth line is usually an instruction line which shows an abbreviated list of functions that can be accessed by pressing the corresponding front panel keypad button below each abbreviation or prompt 5 2 DAC960SU Family User Guide User Interface By pressing the keypad button a command or menu function associated with that prompt is executed if possible otherwise an error indication or status message is provided Start up LCD Screen The start up titl
92. check started Message indicates that the Parity Check process is started Press any key Prompt for user action to clear this status screen LCD Terminal Action Key Action Key Any key Any Displays the previous menu parity check process character key continues in background mode until completed Note An audible alarm beep sounds periodically until the parity check process is complete Status indication showing the completion percentage of the parity check displays on the monitor mode main title screen Manual No 771965 Administration Menu Page Two Administration Menu Page Two baron s HB Uer 27727 CONFIGURATION Z ADMINISTRATION MESSAGE OPTIONS 1 LUN Statistics 2 Enclosure Status 3 Release Controller NTER PARAMETER INSTRUCTIUH Enter option for more options lt Esc gt for previous menu INFORMATION LUN Statistics Enclosure status Release Controller int sta nxt Figure 7 10 Administration Menu Page Two 7 20 DAC960SU Family User Guide Administration Menu Table 7 10 Administration Menu Page Two Description Indication Key Description LUN Statistics Menu selection that provides statistical data about the logical units Enclosure status Menu selection that displays status of the fan power supply and temperature in an AEMI compliant array enclosure Release Controller Menu s
93. creen LCD Terminal Action Key Action Key Any key Any Displays the previous menu character key Manual No 771965 8 43 Toolkit Menu Page Three Toolkit Menu Page Three The AEMI Scan function is a diagnostic utility that is used to scan the SCSI drive channels to detect the removal or insertion of a drive 96 5 AWB Ver 2777 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 Scan HTER PARAMETER INSTRUCTION Enter option for more options Esc for previous menu TMFORMATION AEMI Scan scn C nxt Figure 8 20 AEMI Scan Page One 8 44 DAC960SU Family User Guide Toolkit Menu Table 8 20 AEMI Scan Page One Description Indication Key Description AEMI scan Function that will start the controller s built in utility AEMI Scan diagnostic program LCD Terminal Action Key Action Key ESC Esc Cancels the function exits the Toolkit Menu and displays the Main Menu screen K1 scn Selects the AEMI Scan diagnostic program utility K4 nxt Cancels the function no scan is run and displays the previous menu screen Enter Enter Invokes the AEMI Scan function and displays the next screen Manual No 771965 8 45 Toolkit Menu Page Three Select Channel AEMI Scan Page Two DACI6HS MESSAGE OPTIONS 1 1 Scan HTER PARAMETER THSTRUCTION Enter Channel Number
94. d RAID 5 Striping with parity is a method of providing complete data redundancy that requires only a fraction of the storage capacity for storing redundant information compared to the storage capacity requirements of mirroring In a system configured under RAID 3 or RAID 5 which requires at least three SCSI drives all data and parity blocks are divided between the drives in such a way that if any single drive is removed or fails the data on the missing drive can be reconstructed using the data on the remaining drives refers to the Boolean Exclusive OR operator 2 14 DAC960SU H jas 1 WE RAD 3 or RAID 5 STRIPING with PARITY s gt DRIVE ID 0 irie DRVE ID 1 Data Write DRIVE ID 2 DRIVE ID 3 D gt DRIVE ID 4 Parity Write Figure 2 9 Drive Group Mapped for Block Striping with Parity DAC960SU Family User Guide Functional Description Drive 0 Drive 1 Drive 2 Drive 3 Drive 4 Figure 2 10 Block Striping with Parity RAID 5 standard Manual No 771965 Stripe 0 Stripe 1 Stripe 2 Stripe 3 Stripe 4 Stripe n 2 15 RAID Management Striping with Mirroring RAID 0 1 RAID 0 1 Mylex RAID 6 is a combination of RAID 0 striping and RAID 1 mirroring The advantages of RAID 0 1 are fully mirrored data and better performance than RAID 1 The dis
95. dential installations This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is not guarantee that interference will not occur in a particular installation If this equipment does cause interference to radio or television equipment reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna 2 Move the equipment away from the receiver 3 Plug the equipment into anm outlet on a circuit different from that to which the receiver is powered If necessary the user should consult the dealer or an experienced radio television technician for additional suggestions external connections should be made using shielded cables A Caution Only equipment certified to comply with Class B computer input output devices terminals printers etc should be attached to this equipment Any changes or modifications to the equipment by the user not expressly approved by the grantee or manufacturer could void the user s authority to operate such equipment Declaration of Conformity Manufacturer s Name Manufacturer s Address Declares that the product Product Name Model Number s Year of Manufacture Mylex Corporation 34
96. drive to the array and displays the prompt for the next selection Note Only unused or hot spare standby drives may be selected Drives must be physically connected to be used If an error message appears wait 10 seconds for the drive to spin up then try again Manual No 771965 6 13 Configuration Menu Page One RAID Level Create Array Page Three Dac968s AWB 2777 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 Get Configuration 2 Shou Configuration 3 Create firray ENTER PARAHETER INSTRUCTION Enter RAID Level for the LUN INFORMATION Possible RAID Levels RAIDGRAIDS RAIDS RAID Selected Drives CHN TGT 6 6 8 1 8 3 Enter RAID n Avi RAID ROR3 R5 CI 000102 lt 2 Figure 6 7 RAID Level Create Array Page Three 6 14 DAC960SU Family User Guide Configuration Menu Table 6 7 Create Array Page Three Description Indication Key Description Enter RAID n Number indicates the RAID level to be assigned to the array being created Only numbers for valid RAID levels are accepted AvI RAID Rn Prompt indicates the possible RAID level s that may be assigned to the logical unit CI nnnnnn etc Number pairs indicate the SCSI address of each drive that comprise the array The first digit in each pair is the SCSI channel number The second digit in each pair is the SCSI ID number
97. e screen is displayed on the front panel LCD after the controller is powered on A built in power on self test POST diagnostic checks the controller functions during start up Any errors detected by the POST diagnostic are reported on the title screen Otherwise a successful start up results in a title screen that displays manufacturer identification the on board firmware release level the controller board model number the size of the on board cache and a status message that the startup was successful MYLEX Rev nnnn DAC960S nMB STARTUP COMPLETE Figure 5 2 Title Screen Display Monitor Mode LCD Screen In Monitor Mode the main title screen displays the STARTUP COMPLETE status message on the front panel LCD until 1 Controller operations generate a new status message in its place 2 Someone logs on the controller putting it into Menu Mode Menu Mode LCD Screen Menu mode is reached by logging on the controller which causes the main menu screen to appear Holding the Enter key for at least five seconds when the title screen is displayed will invoke the log on sequence The main menu screen lists three sub menu choices for Configuration Administration and Toolkit utility functions The nxt prompt is also displayed but its button does not control a function on this screen Manual No 771965 5 3 User Interface Screen Modes Configuration Administration Toolkit cfg adm tk nxt
98. e utilities It contains important information on RAID disk array applications and DAC960SU controllers 42 DAC960SU Family User Guide Configuration Using a VT100 Terminal The serial port on the controller s back panel can be used in either VT100 mode or in SLIP mode depending on the setting of the shunt at Pin 6 on the DAC960SU s Distribution Board configuration jumper Configure the V T100 terminal settings to the values shown in Table 3 1 to assure proper communications between the terminal and the DAC960SU Table 4 1 VT100 Terminal Communications Set up Terminal Requirement Serial Port COM 1 Connection Null modem cable user supplied Protocol Asynchronous RS232 Baud Rate 19 200 Data bits 8 Stop bits 2 Parity None Access to the DAC960SU built in utility screens is achieved by sending a Break character from the VT100 terminal keyboard On some terminals this is achieved by pressing the Ctrl and Break keys together and some terminal emulation modes may also require you to press the Enter or Return key refer to the documentation for your specific terminal or terminal emulation software The Break command will cause a password prompt to appear on the monitor screen Since password support is not implemented in this version of the DACO960SU clear the prompt by pressing the Enter or Return key to display the DAC960SU main monitor mode screen Press the Enter or
99. een prepaid on this battery pack AN Caution Do not dispose of a rechargeable battery with regular trash in a landfill Rechargeable batteries contain toxic chemicals and metals that are harmful to the environment Ni Cd Figure C 6 RBRC Logo The RBRC logo on a battery is a verification that recycling fees have been prepaid to the RBRC and such a battery can be recycled at no additional cost to the user The RBRC is a non profit corporation that promotes the recycling of rechargeable batteries including nickel cadmium batteries Manual No 771965 C 13 Reference Information on the RBRC program and the locations of participating recycling centers can be obtained by telephoning 1 800 8 BATTERY in the USA and following the recorded instructions The information obtained from this telephone number is updated frequently since the RBRC program is growing and new recycling locations are being added regularly Reference Calculating Charging Current The charging circuit consists of a 5V source in series with a diode 0 7V drop and a 47 ohm resistor The voltage of the battery being charged works against the charging circuit and is subtracted from the total voltage Typical charging currents for various voltages of nickel cadmium batteries are as follows Table C 5 Typical Charging Currents with Different Battery Voltages NiCad Battery Voltage 1 2V 2 4V 4 0V Charging Current 66mA 40mA 6 4mA
100. election that is reserved for master slave mode failover protection configuration Not applicable in this implementation Indicator arrow marks active selection gt LCD Terminal Action Key Action Key ESC Esc Displays the previous screen main menu K1 int 1 Selects the Start Initialize function K2 sta 2 Selects the LUN Statistics function K4 nxt Selects the next page of Administration menu selections Enter Enter Invokes the submenu or function indicated by the arrow Manual No 771965 7 21 Administration Menu Page Two LUN Statistics DACIGOS ANB Ver 277 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 1 LUN Statistics 2 Enclosure Status 3 Release Controller NTER PARAMETER 8 INSTRUCTION Enter LUN INFORMATION Enter LUN n Cs gt Figure 7 11 LUN Statistics Page One 7 22 DAC960SU Family User Guide Administration Menu Table 7 11 LUN Statistics Page One Description Indication Key Description Enter LUN n Number indicates the logical unit number LUN of the logical unit from which to view statistics LCD Terminal Action Key Action Key gt Cursor Indicator arrow marks active selection ESC Esc Cancels the function and displays the previous menu screen K3 Num keypad Increments the logical unit number K4 Num keypad Decrements the logical unit number Ente
101. ement The DAC960SU functions that monitor and control the operation of the physical dives and logical units are instrumental to the controller s ability to perform RAID management and automated error recovery tasks Controlling Physical Drive States The state of a physical drive refers to a SCSI drive s current operational status At any given time a SCSI drive can be in one of several states ONLINE STANDBY DEAD or WRITE ONLY The controller stores the state of the attached SCSI drives in its non volatile memory as well as on the disks see Configuration on Disk earlier in this chapter This information is retained even after power off If a SCSI disk is labeled DEAD in one session it will stay in the dead state until a change is made either by using a system level utility or after a maintenance rebuild procedure is performed The operational state of a disk drive is indicated by a one letter status code to the DAC960SU monitor screens by a three letter status code to the DACCF software utility or by a three letter status code to the LCD Screen DAC960SUI only Manual No 771965 2 17 Drive Management DAC960S n Ver nnnn CONFIGURATION ADMINISTRATION CHO St OOO S DW LN n OPTIONS 1 Show Drives 2 Drive Information 3 Change Drive State ENTER PARAMETER Figure 2 12 Drives States on the Show Drives VT100 Screen CHO t OOOS DW LN nnnnnn Press any key Figure 2
102. en Manual No 771965 Toolkit Menu Page One Status of Change Change Drive State Page Four DACQ6OS ANB Uer 272777 CONFIGURATION Z ADMINISTRATION HESSAGE OPTIONS ONLINE DEAD STANDBY HTER PARAMETER 8 IHSTRUCTIUH Press any key to continue a State changed successfully State changed Press any key Figure 8 9 Status Change Drive State Page Three 8 18 DAC960SU Family User Guide Toolkit Menu Table 8 9 Status Change Drive State Page Three Description Indication Key Description State changed Message indicates that the selected drive has changed state Press any key Prompt for user action to clear this status screen LCD Terminal Action Key Action Key Any key Any Displays the previous menu character key 8 Note An audible alarm sounds when a drive state is changed to Dead Manual No 771965 Toolkit Menu Page Two Toolkit Menu Page Two 9 5 HB Uer 2277 CONFIGURATION RDHIHISTRRTIUH MESSAGE OPTIONS 1 Format Drives 2 Controller Parameters 3 Controller Diagnostics HTER PARAMETER INSTRUCTION Enter option N for more options lt Esc gt for previous menu INFORMATION Format Drives Controller Params Controller Diag fmt cpr dia nxt Figure 8 10 Toolkit Menu Page Two 8 20 DAC960SU Family User Guide Toolkit Menu
103. er Interface Front panel keypad and LCD interface controls all array configuration and management functions independent of the host operating system DAC960SUI only Serial communications port permits array control through a standard VT100 or equivalent terminal or over a network Software utility DACCF provides DOS level control through a PC running ASPI drivers Automates RAID Functions Automatic failed drive detection Automatic rebuild of the array using stand by hot spare disk after a drive failure Transparent drive rebuild permits automatic rebuild of failed drives during normal operation without having to take the array off line Automatic error detection correction of parity errors bad blocks etc Automatic sector re mapping recovers defective media and corrects data errors Manual No 771965 1 3 Standard Package Contents Increases System Availability Built in diagnostics provide controller and drive fault monitoring during power on as well as during continuous operation Status messages and audible alarms notify the administrator or user of critical conditions Supports AEMI protocols for integrated monitoring of enclosure power supplies fans and temperature Battery backup option protects data in the controller cache in the event of a power interruption Standard Package Contents e DAC960SUI Disk Array Controller Configuration amp Utilities software diskette User Guide reference man
104. ery Back up Option Connector J3 Daughterboard Option Interconnect Port A J4 Daughterboard Option Interconnect Port B J5 Not used J6 Termination Jumpers Controller Board SCSI Termination Jumper J6 Figure 3 5 Jumper Block J6 on DAC960SU a o Table 3 5 Termination Jumper J6 DAC960SU Controller Board Pins Description Shunt On Shunt Off J6 1 Termination Disk Channel 0 Enable Default Disable J6 2 Termination Disk Channel 1 Enable Default Disable J6 3 Termination Host Channel 0 Enable Default Disable J6 4 amp 5 Reserved Leave at Default N A Default Note If you connect a Narrow SCSI 8 bit cable to any DAC960SU channel the controller must be at one end of the bus and Termination Enabled must be set for that channel on Jumper J6 Manual No 771965 SCSI Termination Rules Daughter Board SCSI ID and Termination The DBI960SU is an optional daughter board that provides an additional three SCSI connectors to the controller If the DBI960SU is not attached to the DAC960SU refer to Appendix C for installation instructions If you are installing the optional DBI960SU Daughter Board refer to Setting SCSI Channel Termination on page 3 8 to set the SCSI ID and SCSI termination The Daughter Board jumper block J1A is the same as J6 on the DAC960SU 3 10 DAC960SU Family User Guide Installation S
105. es Dans ce cas il peut tre demand l utilisateur de prendre des m sures appropri es WARNING The DAC960SU family of disk array controllers contain electronic components that are sensitive to electrostatic discharge ESD preventive measures are required when handling this product outside of its protective packaging About This Manual The DAC960SU User Guide and Reference Manual provides information necessary to configure install and use the DAC960SU product family of Ultra SCSI to Ultra SCSI Disk Array Controllers and describes its features functions and options This manual is designed to provide operations and reference information for the experienced system administrator or computer technician who is familiar with the principles and conventions of the Small Computer System Interface SCSI and with Redundant Array of Independent Disks RAID technology Refer to the DACCF Utilities Installation Guide and User Manual for detailed information about how to configure initialize and operate the controller and its connected RAID disk arrays Note Even if you do not plan to use the software utilities be sure to read Chapter 2 Configuration Strategies in the DACCF manual for important information on using RAID disk arrays with DAC960 controllers Chapter 1 contains an overview of the DAC960SUI Controller features options and specifications Chapter 2 provides block diagram level description of the DAC960SUI and a
106. es Page Four Description Indication Key Description Format in progress Message line indicates that the drive formatting is in process on the selected drive s listed on the next line 0001 02 Number pairs indicate the SCSI ID of each drive that is being formatted Message Message line will prompt for user action when all drive formatting is complete and it is time to clear this status screen LCD Terminal Action Key Action Key Any key Any No function until drive formatting is complete character key Displays previous menu screen after Format Drives process is complete for all selected drives Manual No 771965 8 29 Toolkit Menu Page Two Format Status Format Drives Page Five Dh Cc96n s AWB Uer 22777 CONFIGURATION Z ADMINISTRATION MESSAGE OPTIONS 1 1 Format Drives 2 Controller Parameters 3 Controller Diagnostics ENTER PARAMETER f Press any key to continue Format SUCCESSFULL on drive CHH TGT 8 1 Formatting Drives CHN TGT 8 1 Format message CH nn Press any key Figure 8 15 Format Status Screen Format Drives Page Five 8 30 DAC960SU Family User Guide Toolkit Menu Table 8 15 Format Drives Page Five Description Indication Key Description Format message Message indicates the status of the formatting process on the listed drive Format complete Drive formated successfully Format failed Dri
107. evels RAIDGRAID3 RAIDS RAID6 Selected Drives CHN TGT 8 8 6 1 6 3 Enter RAID n Aval RAID Rn Rn Rn 0001 02 gt 9 Confirm that the SCSI channel and drive selections for the logical unit being created are correct If not press the ESC key and repeat the process If they are correct select a RAID level 10 Press Enter and the display will show a logical unit number LUN size selection screen similar to one of the following Manual No 771965 4 19 Configuring the Array 8 9685 Uer 27777 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 3 1 Get Configuration 2 Show Configuration 3 Create Array ENTER PARAMETER INSTRUCTION Enter size of LUN to create in MegaBytes INFORMATION Available Capacity 658 MB Selected Drives CHN TGT 8 0 8 1 6 3 Enter size nnn Aval Cap nnn MB 0001 02 11 From the Front panel press the left or right arrow buttons to move the cursor under each digit in the size field Press the plus or minus button to change the selected digit From the VT100 screen enter the size with the numeric keypad When the LUN size is set to the desired number press Enter The screen for selecting the cache write policy for the logical unit is displayed 4 20 DACO960SU Family User Guide Configuration IMESSRGE OPTIONS Get Configuration Show Co
108. eypad Decrements channel number Enter Enter Invokes the channel number selection and displays the next page Manual No 771965 Configuration Menu Page One Select Drives Create Array Page Two 0 9605 ANB Uer 77727 CONFIGURATION ADMINISTRATION MESSRGE OPTIONS 3 1 Get Configuration 2 Show Configuration 3 Create Array ENTER PARAMETER 09 INSTRUCTION Enter Target ID INFORMATION Select the drives upto 8 for the Array lt Esc gt to end selection Target ID n drvs ESC to end Cl nnnnnn lt 2 Figure 6 6 Select Drives Create Array Page Two 6 12 DAC960SU Family User Guide Configuration Menu Table 6 6 Create Array Page Two Description Indication Key Description Target ID n Number indicates the SCSI ID of a drive to add to the array being created drvs ESC to end Prompt indicating user response options CI nnnnnn etc Number pairs indicate the SCSI address of each drive that comprise the array The first digit in each pair is the SCSI channel number The second digit in each pair is the SCSI ID number LCD Terminal Action Key Action Key ESC Esc Completes the drive selection function and displays the next page K3 Num keypad Increments Target ID number 2 Num keypad Decrements Target ID number Enter Enter Checks the drive selected adds the
109. fore powering on the system Note You may copy the DAC960SU Installation Checklist in this manual to use as a quick reference guide during the installation procedure 3 2 DAC960SU Family User Guide Installation Installation Checklist 4 1 POWER OFF all enclosure and system components 2222222 Prepare the enclosure according to its documentation NNNM 3 Determine the SCSI ID and termination requirements 2222 4 Check the jumper settings 5 Mount the controller and connect the cables 2222206 Safety check the installation 7 Power on the system ____ 8 Format the drives 22220 9 Configure the logical units 10 Initialize the logical units NOTES SCSI ID Termination Enabled DAC960 Controller yes no Host Channel 0 IDO Yes 2 Drive Channel 0 10 7 Yes Drive Channel 1 ID 7 Yes SCSI Drives Drive Channel 0 1 Drive Channel 1 BEY MoLE b OF OV oR Indicates Default Setting Manual No 771965 3 3 DACO960SU Installation DAC960SU Installation The DAC960SU may be installed using a Mylex distribution board or it may be installed in a custom enclosure or backplane This installation procedure uses the DB X960S 3 FS horizontal 3 channel distribution board as an example for the jumper settings and other procedures If a custom enclosure is used refer to the documentation for that enclosure Configuring Jumper and Termination Settings
110. g physical hard disk This is transparent to the operating system Adaptive Read Ahead Device Caching The DAC960SU supports adaptive read ahead device caching This is an intelligent form of caching that determines whether or not it is necessary for the current command to read a full track from a system disk The ability to adapt read ahead caching to the amount of data that actually needs to be read provides more efficient disk I O 2 4 DAC960SU Family User Guide Functional Description SCSI Functions The DAC960SU 1960 RISC processor and SCSI I O processors provide intelligent high performance SCSI interface and control The DAC960SU manages and controls the SCSI bus arbitration between the controller and its connected devices and all SCSI activity of the connected devices Multiple SCSI Format Support The DAC960SU provides one and optionally two Wide Ultra SCSI channels for connecting to the host system s and optionally up to five SCSI channels for connecting disk drives With the appropriate cabling these devices may be any combination of Narrow or Wide and Standard Fast or Ultra SCSI formats see Table 2 1 The host channels may be either single ended or differential drive channels are always single ended Table 2 1 Supported SCSI Formats SCSI Type Clock Rate Data Rate Connector Cable Length Wide Ultra SCSI 20 Mhz 40 MBytes sec 68 pin 3 m 10 ft t 16 bit Ultra SCSI 20 Mhz 20 MBytes
111. he DAC960SU controller to restore cached data to the disks more than 5 seconds with no write activity 2 Initiate an operation such as a copy of a file to a dummy file and power down the system before the cache has time to be flushed approximately 4 seconds 3 Allow the battery backup module to completely discharge to estimate discharge time see Calculations for Battery Duration located later in this manual 4 Restart the system after the battery backup module has completely discharged 5 Recharging the battery will begin after the system is restarted Manual No 771965 C 11 Maintenance Set up Enabling the Write Back Cache It is recommended that the Write Back cache be enabled on any DAC960SU controller equipped with a DBB960S battery backup module Write Back cache improves performance but a battery backup module is needed to ensure data integrity in the event of a power failure Using the Write Through cache the default setting will minimize the risk of data loss when there is no battery backup present but there is a performance trade off To enable the Write Back cache on an Ultra SCSI to Ultra SCSI DAC960SU SUI controller use either the DACCF utility or the firmware resident configuration utilities that are accessible through a VT100 terminal or the built in front panel keypad and LCD screen on the DAC960SUID Maintenance Testing the Battery Backup Module The battery backup module can be tested b
112. his document or its contents should be addressed to Mylex Corporation at the address shown on the cover The following paragraph does not apply to the United Kingdom or any country where such provisions are inconsistent with local law MYLEX CORPORATION PROVIDES THIS PUBLICATION AS IS WITHOUT WARRANTY OF ANY KIND EITHER EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE Some states do not allow disclaimer of express or implied warranties or the limitation or exclusion of liability for indirect special exemplary incidental or consequential damages in certain transactions therefore this statement may not apply to you Also you may have other rights which vary from jurisdiction to jurisdiction Information in this publication is subject to change without notice and does not represent a commitment on the part of Mylex Corporation Changes may be made periodically to the information herein these changes will be incorporated in new editions of the publication Mylex Corporation reserves the right to make improvements and or changes at any time in the product s and or program s described in this publication Itis possible that this publication may contain reference to or information about Mylex Corporation products machines and programs programming or services that are not announced in your country Such references or information must not be construed to mean
113. ibility with their installation before committing to any particular procurement plan WARRANTY REGISTRATION CARD To validate your warranty and receive any future updates concerning your product you must complete and return this Warranty Registration Card within 10 days of purchase Please Print NAME COMPANY M ADDRESS CITY STATE ZIP CODE COUNTRY TELEPHONE FAX NO DATE PURCHASED MODEL NO SERIAL NO PURCHASED FROM ADDRESS CITY STATE ZIP CODE COUNTRY In order for Mylex to better serve your needs please complete the following 1 How did you first learn about MYLEX products 10 Have you ever purchased Mylex products in the past 1 Advertisement Name of Pub LI Article Review 0 Friend LI Yes No LI Retailer LI Salesperson Other If yes which products 2 Where will this product be used 11 Who purchased this product LI Home LJ Workplace 1 Individual LJ Company 3 What other brands if any did you consider 4 Please indicate the most common uses of your system L Personal L Business LI Graphics CAD CAM or Business Graphics LI Accounting Data Retrieval L Multi User L Multi Tasking L Database 5 Which factor most influenced your purchase L Company Reputation Price 1 Features List LJ Performance 6 What does your computer system include Please specify brand and model L System Unit L
114. ies Manual No 771965 3 21 DAC960SUI Installation 3 22 DAC960SU Family User Guide Chapter 4 Configuration Configuration Overview After the hardware installation the SCSI drives connected to the DAC960SU must be formatted by the controller Once formatted the drives must be configured and the logical units initialized before they are ready to use This can be accomplished by one of the following methods e VTIOO terminal connected through the controller s serial port Front panel touch control keypad DAC960SUI only DACCF software running on a PC through the controller s serial port Note The LCD panel and a VT100 terminal CANNOT be in menu mode at the same time The controller only allows one device to access menus at a time VT100 Configuration The serial port on the controller s back panel can be used in either VT100 mode or in SLP mode In VT100 mode a VT100 compatible terminal or a PC running appropriate terminal emulation software is connected to the controller through a null modem cable The terminal is used to access to the built in configuration and administration utility that resides in the controller s firmware In SLP mode a VT100 terminal will not function on the serial port Instead the serial port communicates through a null modem cable to a PC running the DOS based software configuration utilities DACCF EXE To set up a VT100 terminal for use with the DAC960SU see Using a VT100 Ter
115. ion Drive Channel 0 see Table 11 J12 AEMI Array Enclosure Management Interface Port see Table A 12 J13 Power Connector RP1 RP2 Differential termination resistor packs Host Channel 0 Installed RP3 Termination Enabled Removed Termination Disabled Manual No 771965 3 General Identification jg J10 J Figure A 3 DBX960S 6 UDR Fast Wide Dual Differential Distribution Board Table A 3 DBX960 S 6 UDR Dual Differential Distribution Board Connectors and Jumpers Connector Description J1 Drive Channel 2 J2 Drive Channel 3 J3 Drive Channel 0 J4 Drive Channel 1 J5 Host Channel 1 J6 Configuration Jumper J7 Host Channel 0 J8 Power Connector J9 Serial Port J10 Fault and Status Port J11 Reserved tor Testing See pinout drawing and table that follows A 4 DAC960SU Family User Guide 40 Distribution Boards 900000000000000000000000000000 41 Figure A 4 J10 Pin Numbering and Orientation for DBX960S 6 UDR Only Table A 4 J10 Pin Assignments for DBX960S 6 UDR Only Pin Description Pin Description 1 Header Power 41 Ground 2 Drive Channel 0 Fault 0 42 Test Clear t
116. ion Page Two DaCc9 Hs AWB Uer 727 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 2 1 Get Configuration 2 Show Configuration 3 Create Array NTER PARAMETER 8 INSTRUCTION Press any Key to continue INFORMATION Standby drives in Channel 3 4 SBY 0 1 2 Press any key Figure 6 4 Show Configuration Page Two 6 8 DAC960SU Family User Guide Configuration Menu Table 6 4 Show Configuration Page Two Description Indication Key Description SBY Indicates that information on this screen is for standby hot spare drives in the currently displayed configuration Cn Number indicates the SCSI channel number of the standby drives n n Number indicates SCSI ID number of each standby drive on this channel Press any key Prompt to clear this status screen LCD Terminal Action Key Action Key ESC Esc Displays the previous menu screen K1 K4 Any Displays the configuration data for the next channel Enter character key with standby drives until all are shown then displays the previous menu Manual No 771965 6 9 Configuration Menu Page One Create Array Function The Create Array function combines selected drives into a Drive Group The Drive Group may be divided into multiple logical units each with its own RAID level cache policy and capacity Logical units may be added until the maximum capacity of the Drive Group
117. ist If using a Narrow SCSI cable make sure the host adapter is also set to Narrow SCSI Connect power supply cables to both the J10 and J12 power connectors on the distribution board AN Caution Both J10 and J12 power connectors on the distribution board must be connected to a power supply for proper controller operation Optional Connect the null modem cable to the Distribution Board serial port Channel A This cable may be used for connecting to a PC to run the DACCF utilities or to a 100 terminal to run the built in utilities depending on the shunt setting of distribution board configuration Jumper J6 pin 6 Safety check the installation and connections then power on the hard drives the DAC960SU controller and the host system DAC960SU Family User Guide Installation DACO960SUI Installation Configuring Jumper and Termination Settings Jumper settings that determine the DAC960SUI hardware configuration should be checked prior to installing the controller assembly in its enclosure These jumpers may be difficult to change after the controller is installed Inspect the distribution board jumpers to make sure the Host Channel SCSI ID and all other settings are properly configured for your installation See Configuring the Jumpers DAC960SUT on page 3 15 Note Default Host Channel setting is SCSI ID 0 Bits 0 1 2 and 3 are Clear The DAC960SU supports SCSI host addresses from 0 to 15 Determi
118. it Select no to cancel the selections If all of the available capacity is not allocated to the LUN being defined the process repeats from Step 7 until all available capacity is used If all the available capacity is allocated you will be returned to the Configuration Menu to proceed with next step to create the array saving the configuration 4 22 DACO960SU Family User Guide Configuration 14 From the Configuration Menu then press the nxt button or n or until the following screen is displayed DACI OS AMB Uer 2222 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 Delete Last Array 2 Create Standby 3 Save Configuration ENTER PARAMETER INSTRUCTION Enter option N for more options lt Esc gt for previous menu INFORMATION Delete Last Array Create Standby Save Configuration del sby sav nxt 15 Select the Save Configuration function by pressing the button under the prompt or pressing lt 3 gt Press Enter The following message is displayed to notify you that the current configuration is about to change Manual No 771965 4 23 Configuring the Array 9605 AWB Wer 27 CONFIGURATION Z ADMINISTRATION MESSRGE OPTIONS 5 1 Delete Last Array 2 Create Standby 3 Save Configuration NTER PARAMETER INSTRUCTION Press to save the configuration exit INFORMATION Saving the configuration will des
119. keypad and liquid crystal display LCD user interface for array configuration and management This feature eliminates the need for special host software or drivers The compact form factor for the DAC960SUI about the same size as 51 4 inch full height drive permits mounting in a server drive bay or a stand alone external cabinet A built in Array Enclosure Management Interface AEMI supports monitoring of power supplies fans and temperature in AEMI compliant cabinets Manual No 771965 1 1 Controller Functions and Features Controller Functions and Features New Features introduced with Firmware 2 5 and Above Ultra SCSI performance enhancement for faster data transfers RAID3 Configuration on Disk COD Configuration on Disk COD Firmware 2 5 and above introduces a Configuration on Disk COD feature If the system is powered off and any of the following changes are made the disks and controller will automatically reconfigure when the system is restarted Operator intervention is not needed unless a major change such as RAID level stripe size or array size is made Any combination of the following changes can be performed Drives in an array can be removed and reinstalled in any order target IDs can be switched within an array The drives can be exchanged between SCSI channels The DAC960SU be replaced with another DAC960SU controller as long as both controllers have 2 5 firmware or above Feat
120. l 3 5 Horizontal A 8 DRAM 2 3 Drive Groups 2 7 Drive Information 8 6 Drive Management 2 17 Drive Organization 2 7 Drive States Controlling 2 17 Dead 2 19 On line 2 19 Standby 2 19 Write Only 2 19 E Enclosure Requirements DAC960SUI 3 2 Enclosure Status 7 26 Error Messages D 1 External Battery C 6 F Fault Management 8 37 Features 1 2 1 4 Firmware 1 2 2 3 2 3 Force 8bit Drive Channel 8 38 Format Drives 8 22 Formatting the Drives 4 10 Front Panel Configuration DAC960SUI only 4 1 Functional Description Battery Backup C 5 DAC960SU Family 2 1 Daughter Board B 2 G Get Configuration 6 4 H Hot Spares 2 21 Hot Swap Drive Replacement 2 22 Index 2 Initialize Logical Unit 6 52 Installation Battery Backup C 8 DAC960SU 3 4 DAC960SU Family 3 1 DAC960SUI 3 15 Daughter Board B 3 Installation Checklist 3 3 Installation Options 3 1 Installation Overview 3 1 Installation Requirements 3 1 J JBOD 2 12 Jumpers DAC960SU 3 4 DAC960SUI 3 15 L LCD Panel Configuration DAC960SUI only 4 5 LCD Screens DAC960SUI only 5 2 Logical Unit States Controlling 2 20 Critical 2 20 Off line 2 20 On line 2 20 Logical Units 2 8 LUN Statistics 7 22 M Memory Subsystem 2 3 Mirroring 2 12 N Non Disk Devices 3 21 On board Battery 6 Options 1 4 DAC960SU Family User Guide Physical Installation Procedure DAC960SU 3 13 DAC960SUI 3 19 Product Description Battery Backup C 1 DA
121. lects the Start Rebuild function 3 Selects the Start Parity Check function K4 nxt N Selects the next page of Administration menu selections Enter Enter Invokes the submenu selection or function indicated by the selection arrow Manual No 771965 7 3 Administration Menu Page One Rebuild Check Rate DACQ6HS AWB Uer 777 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 1 Rebuild Check Rate 2 Start Rebuild 3 Start Parity Check NTER PARAMETER INSTRUCTION Enter Rebuild Check Rate INFORMATION Current Rebuild Check Rate is Enter Rate nn Rate is nn lt Figure 7 2 Rebuild Check Rate Page 7 4 DAC960SU Family User Guide Administration Menu Table 7 2 Rebuild Check Rate Page One Description Indication Key Description Enter Rate nn Number indicates the amount of background activity the controller allocates to the Rebuild Parity Check operation Lowest priority setting 0 Highest priority setting 50 Rate is nn Number indicates the existing rate setting LCD Terminal Action Key Action Key ESC Esc Cancels the Rebuild Parity Check Rate entered on this screen and displays the next page lt lt Moves cursor below number to the left K2 zy Moves cursor below number to the right K3 Num keypad Increments Rate number K4 Num keypad Decrements Rate
122. ller is permanently set for SCSI ID 7 on each drive channel Each drive on a SCSI channel must be set to a unique ID between 0 and 6 Drives must also be configured to supply termination power to the SCSI bus 3 Connect the host system SCSI interface cable to the DAC960SUI Distribution Board Host connector refer to the appropriate illustration and Table for your specific Distribution Board Manual No 771965 3 19 DAC960SUI Installation Note Do not connect the Wide SCSI 16 bit host channel to a Wide SCSI 16 bit host adapter with a Narrow SCSI 8 bit cable The two devices will negotiate for Wide SCSI communications and then lock the system because the Wide communications path does not exist If using a Narrow SCSI cable make sure the host adapter is set to Narrow SCSI Refer to the SCSI host bus adapter documentation 4 Connect power supply cables to both power connectors on the Distribution Board AN Caution Both power connectors must be connected to a power supply except DBX960S 3 UDR and DBX960S 6 UDR distribution boards which have only one power connector 5 Optional Connect the host serial port to the DAC960SUI serial port on the distribution board using a null modem cable This port may be used for running the DACCF configuration utility or for VT100 terminal support depending on the setting of the configuration Jumper pin 6 6 Safety check the installation and connections then power on
123. llows user to remove the last drive group from the configuration Create Standby Menu selection that allows user to specify drive that Will serve as a hot spare or standby drive Save Configuration Function saves new or modified configuration data to the controller non volatile memory gt Indicator arrow marks active selection LCD Terminal Action Key Action Key ESC Esc Displays the previous screen main menu K1 del 1 Selects the Delete Last Array function K2 sby 2 Selects the Create Standby function K3 sav 3 Selects the Save Configuration function K4 nxt N Selects the next page of Configuration menu selections Enter Enter Invokes the submenu or function indicated by the arrow Manual No 771965 6 27 Configuration Menu Page Two Delete Last Array Function The Delete Last Array function displays the logical unit numbers comprising the last Drive Group created and deletes that Drive Group and all of its associated logical units WARNING Data on the drives will be lost when the array is deleted 96 05 AWB Uer 727 CONFIGURATION Z ADMINISTRATION MESSAGE OPTIONS 1 1 Delete Last Array 2 Create Standby 3 Save Configuration NTER PARAMETER E INSTRUCTION Press V to delete the last array to quit TMFORHATION Deleting an array may cause deletion of more than one LUN Logical Unit numbers 8 1 May delete LUNs
124. logical unit on which to Change Write Policy LCD Terminal Action Key Action Key ESC Esc Cancels the function no change is made and displays the previous menu screen K3 Num keypad Increments the logical unit number K4 Num keypad Decrements the logical unit number Enter Enter Invokes the Initialization function and displays the prompt for the next message screen Manual No 771965 6 47 Configuration Menu Page Three Write Policy Confirmation Change Write Policy Page Two DACI6HS AWB Ver zaan CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 2 1 Start Initialize 2 Change Write Policy HTER PARAMETER Hit spacebar to toggle write policy other to continue IHF RHRTIUH Write policy of LUN 6 Write Through Write policy LUN n Wx chg Figure 6 24 Change Write Policy Page Two 6 48 DAC960SU Family User Guide Configuration Menu Table 6 24 Change Write Policy Page Two Description Indication Key Description Write policy LUN n Wx Prompt notifies the user that the function will change the cache write policy for the LUN identified by the number shown to Wx WB or WT LCD Terminal Action Key Action Key chg Spacebar Selection toggles the write policy between WB Write Back and WT Write Through Enter Enter Invokes the function the change is made and displays a prompt to return to
125. ltra DBX960S 3 UDR Wide Wide or Diff Narrow DAC960SUI 4D n 1 or 2 Ultra 4 Ultra DBX960S 6 UDR Wide Wide or Diff Narrowt DAC960SUI 2W n 1 Ultra 2 Ultra DBX960S 6 FWR Wide Wide or Narrowt DAC960SUI 5W n 10r2 Ultra 5 or 4 Ultra DBX960S 6 FWR Wide Wide or Narrowt DAC960SUI 2 n 1 Ultra 2 Ultra DBX960S 6 FNR Wide Narrow DAC960SUI 5 n 10r2 Ultra 5 or 4 Ultra DBX960S 6 FNR Wide Narrow DAC960SU 2 n 1 Ultra 2 Ultra DBX960S 3 FSt Wide Wide or Narrowt cache size in MB Requires option DBI960SU 3 Daughter board installed Available Separately Requires a 68 pin to 50 pin adapter 3 Il H A 2 DAC960SU Family User Guide Distribution Boards General Identification 9 J11 J12 Figure A 2 DBX960S 3 UDR Differential SCSI Distribution Board Table A 2 Differential SCSI Distribution Board Connectors Jumper Connector Description Ji Serial Port J2 Fast Wide Differential SCSI Connector Host Channel 0 J3 Reserved DO NOT USE J4 Fast Wide SCSI Connector 68 pin Drive Channel 0 J5 Fast Narrow SCSI Connector 50 pin Drive Channel 0 J6 Jumpers SCSI ID and Configuration J7 Fast Wide SCSI Connector 68 pin Drive Channel 1 J8 Fast Narrow SCSI Connector 50 pin Drive Channel 1 J9 Power Connector J10 Fault Indication Drive Channel 1 see Table A 11 411 Fault Indicat
126. ly User Guide Configuration Menu Table 6 9 Create Array Page Five Description Indication Key Description Write policy Wx Indicates the setting of the on board write cache for the logical unit being defined WT Write Through no write cache WB Write Back write cache enabled CI nnnnnn Number pairs indicate the SCSI address of each drive that comprise the array The first digit in each pair is the SCSI channel number The second digit in each pair is the SCSI ID number LCD Terminal Action Key Action Key K3 chg Spacebar Toggles the cache policy mode between WT and WB ESC K1 Any Invokes the cache mode selection and displays the K2 K4 character key next page Enter Manual No 771965 6 19 Configuration Menu Page One Confirm Logical Unit Create Array Page Six DACI6HS AWB Ver 22777 CONFIGURATION ADMINISTRATION MESSRGE OPTIONS 1 Get Configuration 2 Show Configuration 3 Create Array ENTER PARAHETER Press V to create this LUN to redefine the LUN LUN 6 ONLINE 328 HB RAIDS Write Back Selected Drives CHN TGT 8 8 8 1 8 3 LO ON 500MB RnWB 000102 yes no Figure 6 10 Logical Unit Confirmation Create Array Page Six 6 20 DAC960SU Family User Guide Configuration Menu Table 6 10 Create Array Page Six Description Indication Key Description L
127. mation Format Drives Page Three Description Indication Key Description Continue with Fmt Prompt indicates that the function will start the Format Drives process on all drives listed on the next line nnnnnn Number pairs indicate the SCSI identification of each drive that will be formatted The first digit in each pair is the SCSI channel number The second digit is the SCSI ID number LCD Terminal Action Key Action Key ESC Esc Cancels the function no drives are formatted and displays the previous menu screen K1 yes Y Selection formats all drives listed K2 no N Cancels the function no drives are formatted and displays the previous menu screen WARNING Selecting YES will immediately start the Format Drives process ALL DATA WILL BE LOST on the drive s being formatted Manual No 771965 8 27 Toolkit Menu Page Two Format in Progress Format Drives Page Four Dbace s MESSAGE OPTIONS 1 Format Drives Controller Parameters Controller Diagnostics AHB Uer 777 CONFIGURATION ADMINISTRATION Please wait INFORMATION HTER PARAMETER INSTRUCTION Format in progress Formatting Drives CHH TGT 0 0 8 1 4 3 8 28 Format in progress 0001 02 Please wait Figure 8 14 Format in Progress Screen Format Drives Page Four DAC960SU Family User Guide Toolkit Menu Table 8 14 Format Driv
128. minal on page 4 3 Front Panel Configuration DAC960SUI only The front panel keypad and liquid crystal display LCD is the primary user interface for the DAC960SUI configuration and management of the controller and its properly connected disk arrays can be performed from this interface For information on using the front panel controls see Using the LCD Panel DAC960SUI only on page 4 5 Manual No 771965 4 1 Configuration Overview Using the DACCF Software Utility Configuration changes and array management using the DACCF software utility can be performed from a DOS based PC or compatible system connected to the DAC960SU serial port through a null modem cable Note Use the 5 option when running the DACCF EXE utility through the DAC960SU serial port so that the software will look for the controller on COM 1 The software utility does not support COM 2 The DACCF utility can also be run using a DOS based ASPI driver on a PC system equipped with a SCSI Host Bus Adapter HBA This procedure is described in the README TXT file in the DOS sub directory on the DAC960SU Configuration Utilities diskette Procedures for using the DACCF software to configure monitor and manage the DAC960 family of controllers are described in detail in the DACCF Utilities Installation Guide and User Manual 48 Note Be sure to read Chapter 2 Configuration Strategies in the DACCF manual even if you do not plan to use the softwar
129. n Drive Channel 0 see Table A 11 J15 Fault Indication Drive Channel 2 see Table A 11 J16 Fault Indication Drive Channel 3 see Table A 11 J17 Reserved DO NOT USE Requires DBI960SU 3 Daughter board Option A 6 DAC960SU Family User Guide Distribution Boards J 3 J10 EREET A E A IE J11 a 1 1 1 1 oooo REA ES ESSE 0000 o 4 4 4 J13 J14 J15 J16 J417 Figure A 6 DBX960S 6 FNR Narrow SCSI Distribution Board Table A 6 Narrow SCSI 6 Ch Distribution Board Connectors Jumper Connector Description J1 Serial Port J2 Reserved DO NOT USE J3 Fast Narrow SCSI Connector Drive Channel 3 J4 Fault Indication Drive Channel 3 see Table A 11 J5 Fault Indication Drive Channel 2 see Table A 11 J6 Fault Indication Drive Channel 4 see Table A 11 J7 Jumpers SCSI ID and Configuration J8 Fast Narrow SCSI Connector Drive Channel 2 J9 Fast Wide SCSI Connector Host Channel 1 Drive Channel 4 J10 Fast Narrow SCSI Connector Drive Channel 1 J11 Fast Narrow SCSI Connector Drive Channel 0 J12 Fast Wide SCSI Connector Host Channel 0 J13 Power Connector J14 Fault Indication Drive Channel 1 see Table A 11 J15 Fault Indication Drive Channel 0 see Table 11 J16 Array Enclosure Managemen
130. n Number indicates the logical unit number LUN ON OF CR Indicates the status of the logical unit ON on line CR critical OF off line nnn Number indicates the size of the logical unit defined WT WB Number indicates the RAID level of the logical unit RAID 0 1 3 5 6 0 1 7 JBOD CI nnnnnn etc Number pairs indicate the SCSI address of each drive that will comprise the array The first digit in each pair is the SCSI channel address The second digit is the SCSI ID number LCD Terminal Action Key Action Key K1 yes Y Selection creates a logical unit with the configuration settings shown on this screen If full capacity is used the next page displays otherwise the RAID level page is displayed for the next logical unit until the full capacity is used K2 no N Selection cancels the creation of this logical unit and abandons the configuration data entered for this LUN RAID level and LUN size The user is returned to the screen shown in Create Array Page Three Manual No 771965 6 21 Configuration Menu Page One Array Configuration Create Array Page Seven DhC968s AWB Ver 27772 CONFIGURATION ADMINISTRATION HESSAGE OPTIONS 1 Get Configuration 2 Show Configuration 3 Create Array INSTRUCTION Press any key to continue INFORMATION fill the capacity in the created array have been used Selected Drives CHN TGT
131. nction is used to verify the integrity of data on a logical drive LUN It verifies that mirror or parity information matches the stored data on the LUNs that are redundant RAID 1 RAID 3 RAID 5 or RAID 1 0 9 5 AHB Ver zaan CONFIGURATION Z ADMINISTRATION MESSAGE OPTIONS 1 Rebuild Check Rate 2 Start Rebuild 3 Start Parity Check HTER PARAMETER IHSTRUCTIUH Enter LUH TMFORMATION Enter LUN n lt gt Figure 7 7 Start Parity Check Page One 7 14 DAC960SU Family User Guide Administration Menu Table 7 7 Start Parity Check Page One Description Indication Key Description Enter LUN n Number indicates the logical unit number LUN of the logical unit to be checked LCD Terminal Action Key Action Key ESC Esc Cancels the function no logical unit is checked and displays the previous menu screen K3 Num keypad Increments the logical unit number K4 Num keypad Decrements the logical unit number Enter Enter Selects the logical unit to check invokes the Parity Check function and displays the next message screen Manual No 771965 Administration Menu Page One Parity Check Confirmation Start Parity Check Page Two D MESSAGE OPTIONS 1 Rebuild Check Rate 2 Start Rebuild 3 Start Parity Check NTER PARAMETER E IHSTRUCTIUH Hit Y to parity check LUN TMFORMATION
132. ne the SCSI termination requirements for your installation See Setting SCSI Channel Termination DAC960SUI on page 3 18 Note Default termination settings are Enabled for all SCSI channels on the DAC960SU controller Configuring the Jumpers DAC960SUI Configuration jumpers are found on the distribution board the DAC960SUI back panel These jumpers control the host channel SCSI ID and the communications port protocols Inspect the DAC960SUI distribution board jumpers refer to Figure 3 8 Table 3 7 Table 3 8 and Table 3 9 for the configuration jumper settings 1 Make sure that the Host Channel SCSI ID is properly set for your installation Note Default Host Channel setting is SCSI ID 0 Bits 0 1 2 and 3 are Clear 2 Check the Serial Port configuration jumper settings if the VT100 terminal option will be used 3 Determine the SCSI termination requirements for your installation Manual No 771965 3 15 DAC960SUI Installation Note Default termination settings are Enabled for all SCSI channels on the controller Refer to the SCSI Channel Termination procedure Configuring Jumper and Termination Settings described previously in this chapter under the DAC960SU Installation section to change the DAC960SU controller board termination jumper J6 settings if your installation requires termination different from that set by default DBX960S Configuration Jumpers 3 Channel Boards 6
133. nels to be displayed on the screen below the Monitor Mode screen s MESSAGE panel Manual No 771965 5 5 Controller Screen Descriptions Up to three menu items at a time will display in the panel below the prompt OPTIONS Respond to the on screen prompts to select the desired configuration administration or diagnostic functions Typing the number associated with a menu item in the OPTIONS panel such as 1 causes the number to appear next to the prompt labeled ENTER PARAMETER When a menu item is selected its number appears next to the OPTIONS prompt to verify its selection Pressing the Enter key activates the selected function or sub menu Pressing the n key accesses the next page of a menu when there are more than three items to list The panel below the INSTRUCTIONS prompt shows an abbreviated list of other functions and the corresponding key to press for accessing each one Pressing the Esc key allows you to go back to the previous screen at nearly any point in the menus Controller Screen Descriptions The sections that follow show the principle screens of the DAC960SU interface They provide tabular descriptions of the controllers main features and functions Except for the title screen and the log on screen the screens are presented in the order in which they appear as subordinate command screens of the main menu selections Some sub menu screens have further subordinate screens and these are shown
134. nfiguration Create Array ENTER PARAMETER 8 INSTRUCTION Hit spacebar to toggle write policy other to continue INFORMATION Write policy of LUN 6 Write Through Selected Drives CHN TGT 8 8 6 1 8 3 WN a 8 9605 ANB Musics ADMINISTRATION Write policy LN n Wx 00 01 02 C C chg 12 Setthe cache write policy for the LUN to either WT for write through function or WB for write back function by pressing the button under the chg prompt or pressing the spacebar Press Enter The LCD screen displays the selected configuration settings Manual No 771965 4 21 Configuring the Array 8 96085 A WB Uer 2777 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS Get Configuration Show Configuration Create Array ENTER PARAMETER INSTRUCTION WN Enter size of LUN to create in MegaBytes INFORMATION fivailable Capacity 658 HB Selected Drives CHN TGT 8 0 8 1 8 3 LO ON 500MB R5WB 0001 02 yes no Where LO is the logical unit number LUN ON indicates that the LUN status is on line 500MB is the logical drive size in this example R5 indicates RAID level 5 WB indicates write back cache policy and along with the numbers that follow indicate the SCSI channel number and the SCSI ID of the drives that constitute the logical unit 13 Select yes to create the logical un
135. ntroller with existing logical units Always back up all data before making a stripe size change Always reconfigure and initialize the logical units after a new stripe size is saved Block Size The Block Size parameter indicates that the logical block sizes of the LUNs are 512 bytes This firmware release supports only the default setting of 512 bytes and cannot be changed A Caution Data corruption may occur if a block size different than 512 bytes is used with controller firmware release versions 1 14 or earlier Controller Diag The Controller Diag function allows the user to start the built in self test diagnostic program This is the same diagnostic program that runs automatically when the controller is first powered on The only response reported by the diagnostic program is either pass of fail 8 40 DAC960SU Family User Guide Toolkit Menu Since there are no user serviceable parts in the controller a failure message usually means the controller must be returned to a factory authorized service center for repair Dbhc96 s AHB Uer ana CONFIGURATION RDHIHISTRRTIUH MESSAGE OPTIONS 5 1 Format Drives 2 Controller Parameters 3 Controller Diagnostics NTER PARAMETER E IHSTRUCTIUH Press V to run the diagnostics exit IHMF RHATIUM Do you want to run diagnostics Run Diagnostics yes no Figure 8 18 Run Diagnostics Confirmation Controller
136. nu 7 20 LUN Statistics 7 22 Enclosure Status cei eo 7 26 Chapter 8 Toolkit Menu Toolkit Menu Summary eee eene 8 1 Toolkit Menu Page 8 2 Show Drives Function seeeen 8 4 Drive Information 2 4 8 6 Change Drive State 8 12 Manual No 771965 xi Toolkit Menu Page 8 20 Format Drives Function 44 4 0 n 8 22 Controller Parameters 2 8 32 Controller Parameter Settings sees 8 36 Controller Diag e Oe derer 8 40 Toolkit Menu Page Three ssssssseeeneeeeennenenen 8 44 Appendix A Distribution Boards DAC960SUI Identification 2 1 General nnn A 3 Appendix B DBI960SU Daughter Board Product Description 2 1 Regue M NS 1 Functional Description 2 B 2 Daughter Board Installation s B 3 Termination oce ERR Said tates B 3 Installing the Cables and Daughter Board B 4 Appendix C Battery Backup Unit Product Description sisit net eo fce C 1 DBB960S Connectors and Indicator
137. nu Table 8 12 Format Drives Page Two Description Indication Key Description Target ID n Number indicates the SCSI ID of the drive to be formatted drives ESC to end Prompt for user action LCD Terminal Action Key Action Key ESC Esc 1 Cancels the Format Drives function and displays the previous menu if no drives were selected for formatting by pressing the Enter key 2 Completes the drive selection function and displays the next page K3 Num keypad Increments the drive SCSI ID number Num keypad Decrements the drive SCSI ID number Enter Enter Invokes the Select Drive function and displays another Select Channel page to allow selection of another drive for formatting Manual No 771965 8 25 Toolkit Menu Page Two Format Confirmation Format Drives Page Three DRaC968s AMB Ver 777 CONFIGURATION Z ADMINISTRATION MESSAGE OPTIONS 1 Format Drives Controller Parameters Controller Diagnostics tM Ll HTER PARAMETER INSTRUCTION Press to format selected drives H to to quit INFORMATION Data on selected drives will be destroyed continue with format Selected Drives CHN TGT 6 6 6 1 6 3 Continue with Fmt 0001 02 yes no Figure 8 13 Confirm Format Format Drives Page Three 8 26 DAC960SU Family User Guide Toolkit Menu Table 8 13 Format Confir
138. nual No 771965 6 39 Configuration Menu Page Three Start Initialize The Initialize function should be used on all logical units immediately after they are created and before data is written Initialization clears all data on the logical unit and synchronizes the parity and mirror information with the data WARNING Failure to initialize a newly created logical unit can result in loss of data 9 5 AHB Ver zana CONFIGURATION Z ADHINISTRATION MESSAGE OPTIONS 1 1 Start Initialize 2 Change Write Policy NTER PARAMETER 8 INSTRUCTION Enter LUN IHMF RHAHTIUH Enter LUN n lt 2 Figure 6 20 Start Initialize Page One 6 40 DAC960SU Family User Guide Configuration Menu Table 6 20 Start Initialize Page One Description Indication Key Description Enter LUN n Number indicates the logical unit number of the logical unit to be initialized LCD Terminal Action Key Action Key ESC Esc Cancels the function nological unit is initialized and displays the previous menu screen K3 Num keypad Increments the logical unit number K4 Num keypad Decrements the logical unit number Enter Enter Invokes the Initialization function and displays the prompt for the next message screen Manual No 771965 6 41 Configuration Menu Page Three Initialize Confirmation Start Initialize Page Two 96
139. nual No 771965 General Identification 3 UDR J6 8 DBX960S Configuration Jumpers 3 Channel Boards 1 1 loooooo 3 FS J6 6 Channel Boards TERN 1 6 UDR J6 12 1 12 6 J7 1 loooooo oooc 12 6 FWR J6 Figure A 9 Distribution Board Configuration Jumpers Table A 9 Host Channel amp Serial Port Configuration Jumper Distribution Board Pin Description Shunt On Shunt Off 1 Host Channel 0 SCSI ID bit 0 Bit 0 set Bit 0 clear Default 2 Host Channel 0 SCSI ID bit 1 Bit 1 set Bit 1 clear Default 3 Host Channel 0 SCSI ID bit 2 Bit 2 set Bit 2 clear Default 4 Host Channel 0 SCSI ID bit 3 Bit 3 set Bit 3 clear Default 5 Reserved Leave at Default N A Default 6 Serial Port Protocol VT100 SLP1 Default 7 Serial Port Baud Rate 19 2K Baud Reserved Leave at Default Default 8 Reserved Leave at Default Default N A 9 Host Channel 1 SCSI ID bit 0 Bit 0 set Bit 0 clear Default 10 Host Channel 1 SCSI ID bit 1 Bit 1 set Bit 1 clear Default 11 Host Channel 1 SCSI ID bit 2 Bit 2 set Bit 2 clear Default 12 Host Channel 1 SCSI ID bit 3 Bit 3 set Bit 3 clear Default 10 DAC960SU Family User Guide Distribution Boards Table A 10
140. o another Each disk contains a copy of the data on the other drive RAID 1 MIRRORED ARRAY DAC960SU Identical data on both drives Figure 2 6 Mirrored Drive Group 2 12 DAC960SU Family User Guide Functional Description Striping RAID 0 Striping refers to the storing of a sequential block of incoming data across multiple drives in a drive group For example if there are three drives in a drive group or pack the data is separated into blocks Block one of the data is stored on drive one block two on drive two block three on drive three Drive one will again be the location of the next block block four then block five is stored on drive two block six on drive three etc This method can significantly increase disk system throughput particularly for transferring large sequential data blocks Note RAID 0 does not provide parity for redundancy and is susceptible to data loss in the event of a drive failure Disk 0 Disk 1 Disk 2 Block 0 Block 1 Block 2 Block 3 Block 4 Block 5 Block 6 Block 7 Block 8 Block n Block n 1 Block n 2 Figure 2 7 Block Striping DAC960SU RAID O SIRIPED ARRAY di DRIVE ID 0 21 DRIVE ID 1 DRIVE ID 2 Figure 2 8 Drive Group Mapped for Block Striping Manual No 771965 2 13 RAID Management Striping with Parity RAID 3 an
141. o Send A 3 Drive Channel 0 Fault 1 43 Test Request to Send A 4 Drive Channel 0 Fault 2 44 Test Data Set Ready A 5 Drive Channel 0 Fault 3 45 Test XRXDB 6 Drive Channel 0 Fault 4 46 Test XTXDB 7 Drive Channel 0 Fault 5 47 Header Power 8 Drive Channel 0 Fault 6 48 Host Channel 1 ID 3 8 Drive Channel 0 Fault 7 49 Host Channel 1 ID 2 10 Drive Channel 0 Fault 8 50 Host Channel 1 ID 1 11 Drive Channel 0 Fault 9 51 Host Channel 1 ID 0 12 Drive Channel 1 Fault 0 52 J6 JP3 On 13 Drive Channel 1 Fault 1 53 J6 JP2 On 19 2Kbps Off Variable 14 Drive Channel 1 Fault 2 54 J6 JP1 On VT100 Off SLIP 15 Drive Channel 1 Fault 3 55 Host Channel 0 ID 3 16 Drive Channel 1 Fault 4 56 Host Channel 0 ID 2 17 Drive Channel 1 Fault 5 57 Host Channel 0 ID 1 18 Drive Channel 1 Fault 6 58 Host Channel 0 ID 0 19 Drive Channel 1 Fault 7 59 Ground 20 Drive Channel 1 Fault 8 60 Drive Channel 3 Fault 9 21 Drive Channel 1 Fault 9 61 Drive Channel 3 Fault 8 22 Fan 0 Status 62 Drive Channel 3 Fault 7 23 Fan 1 Status 63 Drive Channel 3 Fault 6 24 Fan 2 Status 64 Drive Channel 3 Fault 5 25 Host LED 65 Drive Channel 3 Fault 4 26 Power Supply 0 Fault 66 Drive Channel 3 Fault 3 27 Power Supply 1 Fault 67 Drive Channel 3 Fault 2 28 Power Supply 2 Fault 68 Drive Channel 3 Fault 1 29 SCSI Active LED 69 Drive Channel 3 Fault 0 30 Temperature Fault 70 Drive Channel 2 Fault 9 31 Cache Dirty 71 Drive Channel 2 Fault 8 32 Check Master 72 Drive Channel 2 Fault 7 33
142. older terminals Molex P N 50011 8100 External Battery Rated 1 2V to 4 0V battery source connected to the DBB960S through JP2 Manual No 771965 C 3 Specifications Module Dimensions DBB960S 3 1 x 2 1 inch The DAC960SU controller maintains a single slot profile with the DBB960S battery backup module installed Environmental TemperatureOperating 0 C to 40 C Storage 40 C to 60 C HumidityOperating 45 to 85 rh Non operating 45 to 85 rh C 4 DAC960SU Family User Guide Battery Backup Unit Functional Description The DBB960S Battery Backup Unit is an optional daughter board that is installed onto a DAC960SU Disk Array Controller Logic on the DAC960SU controller and on the DBB960S BBU senses whether data is present when the write back cache is enabled If power to the DAC960SU memory module is interrupted and there is data in the write cache the BBU supplies power to refresh the memory module to preserve the integrity of its cache contents When power is restored and the system restarts the DAC960SU automatically writes the contents of the cache to disk thus preventing data loss DAC960SU DBB960S Vea J1 Ves Vaar CACHE 7 Logic cy rad Cache Control Cache Control i960 NT m Firmware o Data Present Data Present gt Ne Se E o Host Interface Charge
143. oller instructs the drives to read data which is anticipated to be requested next and caches the data When a request is made and the data is in the cache performance is improved If the request is not served by the data in the cache the time alloted to the read ahead is lost and a drive read must be performed Read ahead cache is recommended for sequential data e g video servers and is not recommended for random data e g database servers However Mylex read ahead cache is adaptive This means it will automatically switch between read ahead and non read ahead strategies depending on the type of request received Unless the information requests are very random it is recommended that read ahead cache is left enabled Write Through Cache Write Through Cache refers to a cache writing strategy whereby data is written to the SCSI Drive before a completion status is returned to the host operating system This caching strategy 15 considered more secure since power failure will be less likely to cause loss of data However a Write Through cache results in a slightly lower performance in most environments Manual No 771965 2 23 Cache Management Write Back Cache Write Back Cache refers to a caching strategy whereby write operations result in a completion status being sent to the host operating system as soon as the cache not the disk drive receives the data to be written The target SCSI Drive will receive the data at a more appr
144. ons lt Esc gt for previous menu INFORMATION Channel n drives ESC to end lt gt 4 Select the SCSI channel that contains the drive to format and press Enter The following prompt is displayed Target ID 2 n Manual No 771965 Configuring the Array 5 Select the SCSI ID number of a drive to format and press Enter The display will confirm the selection with a line similar to the following 01 Where is the SCSI channel ID 0 is the SCSI channel number and 1 is the SCSI ID of the selected drive Repeat the channel and drive selection steps for each drive to be formatted The display will identify each drive as it is selected similarly to the following DaC968S WB Ver 277 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 Format Drives 2 Controller Parameters 3 Controller Diagnostics PARAMETER INSTRUCTION Enter option for more options lt Esc gt for previous menu INFORMATION Channel 0 drives ESC to end 000102 lt gt 6 When the last drive to format is selected press ESC The display prompts you to start formatting with a screen similar to the following 4 12 DACO960SU Family User Guide Configuration MESSAGE OPTIONS 1 Format Drives Controller Parameters Controller Diagnostics a HTER PARAMETER Press to fo
145. opriate time in order to increase controller performance If a power failure should occur before the write to disk is completed data remaining in the cache will be lost unless some form of backup power is provided Therefore it is recommended that a backup power source e g a BBU or UPS be used when enabling the write back caching mode Cache Battery Backup An optional cache battery backup p n DBB960S 650 that can be used to protect against cache data loss in the event of a power failure is available for the DAC960SU 2 24 DAC960SU Family User Guide Chapter 3 Installation Installation Overview This manual describes how to perform the three main procedures necessary to make the DAC960SU Ultra SCSI to Ultra SCSI Disk Array Controller ready to use The following chapters contain step by step instructions for performing these procedures Set up and install the controller hardware Described in this chapter Format and configure the physical drives See Chapter 4 Configuration Define and initialize the logical units See Chapter 4 Configuration At the successful conclusion of these procedures the disk array system will be ready to receive the operating system applications software and data Requirements The following items are required to perform this installation DAC960SU Disk Array Controller Disk array enclosure or equivalent Mounting hardware required by the enclosure attachment rails
146. option N for more options lt Esc gt for previous menu INFORMATION Get Configuration Show Configuration Create Array get sho crt nxt 2 Select the Get Configuration function by pressing the button under the get prompt or pressing lt 1 gt Press Enter to load the existing configuration data into the temporary working space The following information is displayed Manual No 771965 4 15 Configuring the Array DAC96HS ANB Uer 27727 CONFIGURATION ADMINISTRATION OPTIONS 1 1 Get Configuration 2 Show Configuration 3 Create Array ENTER PARAMETER INSTRUCTION Press any key to continue INFORMATION Configuration loaded successfully Config loaded Press any key Press any button to return to the Configuration Menu first page 4 Select the Create Array function by pressing the button under the ert prompt or pressing lt 3 gt Press Enter to access the functions The display prompts you to enter the following information 4 16 DAC960SU Family User Guide Configuration 0 9605 ANB Uer 77727 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 Get Configuration 2 Show Configuration 3 Create Array ENTER PARAMETER i INSTRUCTION Enter Channel Number INFORMATION Select the drives upto 8 for the Array lt Esc gt to end selection Channel n drives ESC to end
147. orce 8bit Drive Channel The Force 8bit Drive Channel function allows the controller to communicate with Wide SCSI 16 bit devices connected to it through a Narrow SCSI 8 bit data cable on the specified drive channel default setting for the Force 8bit function is disabled Enabling this option prevents the controller from negotiating for wide SCSI transfers This function should be enabled only when connecting Wide SCSI 16 bit drives or devices to the controller using a Narrow SCSI 8 bit cable 8 38 DAC960SU Family User Guide Toolkit Menu SCSI Transfer The SCSI Transfer function sets the maximum transfer rate for each drive channel The default setting is 10MB This setting produces 10 MB sec transfers for Fast SCSI 20 MB sec transfers for Fast and Wide SCSI and 40MB sec transfers for Wide Ultra SCSI The default setting should be changed only if problems are encountered in communicating with a drive Do not change the default setting unless you are doing so as part of a trouble shooting activity Note Problems communicating with a drive can be caused by several conditions e g improper termination wrong drive ID setting SCSI cable is too long faulty equipment etc Spin up The Spin up function controls how the SCSI drives in the array are started spun up There are three different Spin up modes that may be selected by the user The default mode setting is Automatic Automatic This spin up mode
148. ortant RAID 3 Stripes blocks of data across all drives Maintains parity information which can be used for data recovery Benefits Uses a fraction of the disk space required by RAID 1 to achieve data redundancy The array will continue to function normally in the event of either a member disk failure of failure of the path to a member disk The controller can recreate lost data on a replacement drive without interrupting access by users The controller will do so automatically if a Hot Spare is available or the administrator can manually initiate a rebuild Drawbacks Cannot match RAID write performance because of the processing required to compute and write error correction data While the controller is rebuilding a drive users will experience reduced performance if they try to read or write data to the logical unit Glossary 2 DAC960SU Family User Guide Glossary RAID 5 Stripes blocks of data and parity information across all drives Benefits Uses a fraction of the disk space required by RAID 1 to achieve data redundancy Provides good performance for transaction processing applications because each drive can read and write independently Should a drive fail the controller continues to allow reads and writes on the failed drive by regenerating the missing information The controller can recreate lost data on a replacement drive without interrupting access by users The controller will do so automatically if a Hot Sp
149. ounding down of the third decimal place of the two numbers Manual No 771965 7 25 Administration Menu Page Two Enclosure Status The DAC960SU includes cabinet fault reporting for AEMI compatible enclosures Status is reported on up to three fans three power supply units PSUs and one enclosure temperature sensor The status messages pass fail report only the fault signals input from the enclosure MESSAGE OPTIONS 2 LUN Statistics Enclosure Status Release Controller HTER PARAMETER Press any key to continue FANG FANT FAN2 PURB PWR1 PWR2 OKAY OKAY OKAY OKAY OKAY OKAY OKAY DAC9GHS AWB Uer CONFIGURATION ADMINISTRATION FO F1 F2 P1 P2 TO OK OK OK OK OK OK OK Press any key Figure 7 13 Enclosure Status 7 26 DAC960SU Family User Guide Administration Menu Table 7 13 Enclosure Status Indication Key Description Fn Fan Number indicates the enclosure fan identification Pn Power unit Number indicates the enclosure power supply unit identification TO Temperature Indicates the enclosure temperature sensor status message OK operating within specified parameters IF failure or operating out of specification Press any key Prompt for user action to clear this status screen LCD Terminal Action Key Action Key Any key Any Displays the previous menu character key
150. ppears next to the item to verify its selection Pressing the Enter key activates the selected sub menu or function The button below nxt on the last menu line accesses the next page of a menu when there are more than three items to list After the DAC960SUI power on sequence is complete the controller is in a normal operating mode It checks the keypad every 3 5 seconds for new input Pressing the Enter key for at least four seconds will start the utility program and display its main menu Note For best performance do not leave a menu displayed during normal operation The DAC960SUI controller checks the keypad at a much higher rate when the menus are on screen than it does for the monitor mode screen This can degrade controller performance Pressing the ESC key several times will return the display to the main monitor mode screen and assure the best operational performance from the controller 4 6 DACO960SU Family User Guide Configuration Configuring the Array Starting the Controller Manual No 771965 1 Power on the DAC960SU At the end of the power on self test sequence the DAC960SU will display a screen similar to one of the following DRL96BS AHB Uer 777 CONFIGURATION ADMINISTRATION MESSAGE STRRTUP COHPLETE MYLEX Rev nnnn DAC960S n MB STARTUP COMPLETE 2 To access the built in configuration and administration utility press the front panel Enter key and hold for at least
151. r Enter Invokes the LUN Statistics function and displays the next page Manual No 771965 7 23 Administration Menu Page Two Statistics Display LUN Statistics Page Two OPTIONS 1 4 LUN Statistics 2 Enclosure Status 3 Release Controller HTER PARAMETER INSTRUCTION Press any key to continue INFORMATION per Second 27 Read Hits 85 Reads 17 Writes 82 DREC968S AHB Uer 2777 CONFIGURATION ADMINISTRATION 27 HIT 85 RDS 17 WRT 82 Press any key Figure 7 12 LUN Statistics Page Two 7 24 DAC960SU Family User Guide Administration Menu Table 7 12 LUN Statistics Page Two Description Indication Key Description n Number indicates the I O transfers per second since the last time this function was invoked HIT Number indicates percentage of cache read hits since the last time this function was invoked RDS Number indicates percentage of LUN I Os that were reads since the last time this function was invoked Number indicates percentage of LUN I Os that were writes since the last time this function was invoked Press any key Prompt for user action to clear this status screen LCD Terminal Action Key Action Key Any key Any Displays the previous menu character key Note 99 total percentage number achieved by adding I O reads and I O writes is due to the r
152. r previous menu IMF RHATIUM ONLINE DEAD STANDBY onl ded sby nxt Figure 8 6 Change Drive State Page One 8 12 DAC960SU Family User Guide Toolkit Menu Table 8 6 Change Drive State Page One Description Indication Key Description ONLINE Menu selection that allows the user to change a drive state to Online DEAD Menu selection that allows the user to change a drive state to Dead STANDBY Menu selection that allows the user to change a drive state to Standby gt Indicator arrow will appear and mark the active selection LCD Terminal Action Key Action Key ESC Esc Displays the previous menu screen K1 onl 1 Invokes the change drive state function to make the drive Online K2 ded 2 Invokes the change drive state function to make the drive Dead sby 3 Invokes the change drive state function to make the drive Standby Enter Enter Invokes the function indicated by the arrow Manual No 771965 Toolkit Menu Page One Select Channel Change Drive State Page Two DACI6HS AWB Uer sann CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 ONLINE 2 DEAD 3 STANDBY NTER PARAHETER 8 INSTRUCTION Enter Channel Number INFORMATION Channel n lt Table 8 7 Select Channel Change Drive State Page Two 8 14 DAC960SU Family User Guide Toolkit Menu Figure
153. r s non volatile memory K2 ext N Selection exits the function without saving any changes Manual No 771965 Toolkit Menu Page Two Controller Parameter Settings The default settings for the DAC960SU controller parameters are shown in Table 6 18 These settings will provide optimum performance for most applications and usually will not need to be changed In some applications it may become necessary to change one or more of the default settings Before making any changes to the default parameter settings please read the provided descriptions of the parameter settings and fully understand the implications of the change that is about to be made WARNING Inappropriate changes to the controller parameter settings can result in degraded performance or possibly data loss Prompt Description Selection Auto Rbld Mgmt Automatic Rebuild Management Enable Disable function Fault Mgmt Fault Management function Enable Disable SCSI Active Neg SCSI Active Negation function Enable Disable Ctl Read Ahd Controller Read Ahead function Enable Disable Super Read Ahd Super Read Ahead function Enable Disable Tag Chn n Command Tag channel number Enable Disable Force 8 Bit Ch n Fast SCSI mode channel number Enable Disable SCSI Xfr Chn n SCSI Transfer rate channel number 10MB Asyn 8MB 5MB Spinup SCSI device spin up method Automatic On Power On Command Stripe Size
154. repair and upgrade physical and logical drives connected to the DAC960SU The menu is organized as follows Administration Menu Page One e Rebuild Check Rate Start Rebuild Start Parity Check Administration Menu Page Two LUN Statistics Enclosure Status Manual No 771965 7 1 Administration Menu Page One Administration Menu Page One 9 5 AHB Ver 5777 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 Rebuild Check Rate 2 Start Rebuild 3 Start Parity Check NTER PARAMETER INSTRUCTION Enter option H for more options lt Esc gt for previous menu IHF RHRTIUM Rebuild Check Rate Start Rebuild Start Parity Check rte rbd pyc nxt Figure 7 1 Administration Menu Page One 7 2 DAC960SU Family User Guide Administration Menu Table 7 1 Administration Menu Page One Description Indication Key Description Rebuild Check Rate Menu selection that allows user to specifiy the controller rebuild and parity check priority rate Start Rebuild Menu selection that allows user to start a rebuild process Start Parity Check Menu selection that allows user to start a parity check on a logical unit gt Indicator arrow marks active selection LCD Terminal Action Key Action Key ESC Esc Displays the previous screen main menu K1 rte 1 Selects the Rebuild Check Rate function 2 rbd 2 Se
155. require you to press the Enter or Return key refer to the documentation for your specific terminal or terminal emulation software Start up VT100 Screen To start up the controller s VT100 utility power on the terminal the drives and the DAC960SU From the VT100 terminal start the DAC960SU Configuration Administration utility by issuing the Break command The Break command will cause a password prompt to appear on the monitor screen Since password support is not implemented in this version of the DAC960SU the prompt can be cleared by pressing the Enter or Return key to display the DAC960SU main monitor mode screen After you press the Enter or Return key to clear the password prompt The terminal will display the Monitor Mode panel header MESSAGE Monitor Mode VT100 Screen In Monitor Mode the terminal monitor screen displays the status messages in the panel below the screen prompt indicated by the MESSAGE header Any status message displayed in this panel will remain on screen until 1 Controller operations generate a new status message in its place 2 Someone presses the Enter or Return key putting the controller into Menu Mode 3 Someone presses the Esc key causing the controller into exit the utility and return to the main terminal screen Menu Mode VT100 Screen Press the Enter or Return key to display the Menu Mode screen Menu Mode causes additional prompts and pa
156. ring Jumper and Termination Settings 3 15 DAC960SUI Physical Installation Procedure 3 19 Connecting Non Disk Devices 3 21 Chapter 4 Configuration Configuration Overview 4 1 VT100 Configuration 2 eem 4 1 Front Panel Configuration DAC960SUI only 4 1 Using the DACCF Software Utility 4 2 Using a VT100 Terminal eene 4 3 Operating the VT100 controls 4 4 Using the LCD Panel DAC960SUI only 4 5 Operating the Front Panel Controls 4 5 Configuring the 4 7 Starting the Controller 2 em 4 7 Formatting the Drives 4 10 Configuring a Logical Unit LUN een 4 14 Initializing the Logical 8 4 25 Chapter 5 User Interface OVGIVIOW eerte e Rer He ER ede Ue cip en 5 1 User Interface Screen 5 2 Navigating the 100 Terminal Screens 5 4 Controller Screen Descriptions 5 6 DAC960SU Family User Guide Menu Screen Locator 5 7 Monitor Mode
157. rmat selected drives to to quit THFORMATION Data on selected drives will be destroyed continue with format Selected Drives CHN TGT B B 8 1 8 3 DRC96BS AHB Uer 52777 CONFIGURATION Z ADMINISTRATION Continue with Fmt 00 01 02 yes no 7 Confirm that the SCSI channel and drive selections are correct Select yes to start formatting the drive s Select no to cancel the formatting routine WARNING ALL DATA WILL BE LOST by formatting the drive s Manual No 771965 4 13 Configuring the Array Configuring a Logical Unit LUN CONFIGURE LUN QUICK REFERENCE Select the Configuration Menu Load temporary workspace Get Configuration Select Create Array Select the Drive Channel Select the drive s Target ID Repeat until last drive added to the array is selected Set the RAID Level Set the LUN size capacity Set the Write Cache policy Confirm the selections Repeat until the entire array capacity is used Save the configuration 1 From the Main Menu select Configuration by pressing the button under the cfg prompt or pressing n Press Enter The following menu choices are displayed 4 14 DAC960SU Family User Guide Configuration 0829605 ANB Uer 72777 CONFIGURATION ADMINISTRATION IMESSRGE OPTIONS 1 Get Configuration 2 Show Configuration 3 Create Array ENTER PARAMETER E INSTRUCTION Enter
158. roller divides data into blocks and writes them across multiple drives for increased performance Hot spare A physical drive not part of a logical unit that the controller can use to automatically rebuild a logical unit that goes critical Input Output Refers to disk read and writes Logical Unit Disk storage space on one or more physical drives which appears to the computer as one drive Sometimes referred to as a system drive or a logical drive RAID levels The disk array controllers monitored by this utility support four RAID Manual No 771965 Glossary 1 Advisory Board approved RAID 0 RAID 1 RAID 3 RAID 5 and two special RAID levels RAID 0 1 and JBOD RAID 0 The controller stripes data across multiple drives Benefits Very high data throughput especially for large files Drawbacks Does not deliver any fault tolerance data is lost if any drive in the array fails Uses Intended for non critical data requiring high performance RAID 1 Disk mirroring controller duplicates data from one drive to another Benefits Provides 100 data redundancy Should one drive fail the controller simply switches reads and writes to the other drive Drawbacks Requires two drives for the storage space of one drive While a controller is rebuilding a drive users will experience reduced performance if they try to read or write data to the logical unit Uses When data availability is most imp
159. rompt will display if the user has not initialized a new or modified configuration before attempting exit the Configuration Menu 96 05 HB Ver CONFIGURATION Z ADMINISTRATION MESSAGE OPTIONS 4 Get Configuration 2 Show Configuration 3 Create Array HTER PARAMETER INSTRUCTION Hit to exit H to return to menu Configuration has been changed exiting will lose the changes Cfg changed Exit yes no 5 2 Figure 6 26 Configuration Changed Prompt Configuration Menu Alternate Screen 6 52 DAC960SU Family User Guide Configuration Menu Table 6 26 Initialize LUN Prompt Alternate Screen Description Indication Key Description LUN not inited Exit Prompt notifies the user that a change to the current configuration was made and saved but the new logical units are not initialized LCD Terminal Action Key Action Key yes Y Selection exits theConfiguration Menu and returns the display to the previous menu The new or changed configuration is not initialized K2 no N Selection returns the user to the Configuration Menu where the Start Initialize function may be selected Manual No 771965 6 53 Configuration Menu Page Three 6 54 DAC960SU Family User Guide Chapter 7 Administration Menu Administration Menu Summary The Administration menu is used to monitor maintain
160. s or minus prompt will cause a number or some other user defined or optional selection to increment or decrement gt Manual No 771965 4 9 Configuring the Array Formatting the Drives FORMAT DRIVE QUICK REFERENCE Select the Toolkit Menu Select the Format Drives function Select the Drive Channel number Select the drive Target ID Repeat until the last drive to format is selected Confirm the selections Start the format 1 From the Main Menu select the Toolkit by pressing the button under the nxt prompt or pressing Enter 2 Access the next page by pressing the button under the nxt prompt or pressing the n key The following screen is displayed DACI6GS AMB Ver waaay CONFIGURATION ADMINISTRATION 1 Format Drives 2 Controller Parameters 3 Controller Diagnostics HTER PARAMETER Enter option H for more options lt Esc gt for previous menu INFORMATION Format Drives Controller Params Controller Diag fmt cpr dia nxt 4 10 DAC960SU Family User Guide Configuration 3 Select the Format Drives function by pressing the button under the fmt prompt or pressing 1 Press Enter The following screen is displayed 9 5 AHB Ver 777 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 Format Drives 2 Controller Parameters 3 Controller Diagnostics PARAMETER INSTRUCTION Enter option H for more opti
161. t for previous menu INFORMATION Channel n drives ESC to end lt 2 Figure 8 11 Select Channel Format Drives Page One 8 22 DAC960SU Family User Guide Toolkit Menu Table 8 11 Select Channel Format Drives Page One Description Indication Key Description Channel n Number indicates the SCSI channel of the drive to be formatted drives ESC to end Prompt for user action LCD Terminal Action Key Action Key ESC Esc Cancels the function and displays the previous menu screen if no drive is selected K3 Num keypad Increments the drive channel number K4 Num keypad Decrements the drive channel number Enter Enter Selects the drive channel containing the drives to be formatted and displays the next screen Manual No 771965 8 23 Toolkit Menu Page Two Select Drive Format Drives Page Two DRC96BS AHB Uer 777 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 Format Drives Controller Parameters Controller Diagnostics WN a HTER PARAMETER Enter Target ID THFORMATION Select the drives upto 8 to be formatted lt Esc gt to end selection Selected Drives CHN TGT 8 6 8 1 Target ID n drives ESC to end lt gt Figure 8 12 Select Drive Screen Format Drives Page Two 8 24 DAC960SU Family User Guide Toolkit Me
162. t Initialize Page Three 6 44 DAC960SU Family User Guide Configuration Menu Table 6 22 Start Initialize Page Three Description Indication Key Description Initialize started Message indicates the initialization process is started Press any key Prompt for user action to clear this status screen LCD Terminal Action Key Action Key Any key Any Displays the previous menu initialization process character key continues in background mode until completed Note Pressing the ESC key several times will display the monitor mode main screen An audible alarm beep sounds periodically until the initialization process is complete Status indication showing the completion percentage of the initialization process displays on the monitor mode main title screen Manual No 771965 6 45 Configuration Menu Page Three Change Write Policy The Change Write Policy function DaC968S HB Ver 277 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 2 1 Start Initialize 2 Change Write Policy PARAMETER RETIUM EU Enter LUN INFORMATION Enter LUN n lt 2 Figure 6 23 Start Initialize Page 6 46 DAC960SU Family User Guide Configuration Menu Table 6 23 Start Initialize Page One Description Indication Key Description Enter LUN n Number indicates the logical unit identification of the
163. t Interface Port see Table A 12 J17 Power Connector Requires DBI960SU 3 Daughter board Option Manual No 771965 7 General Identification J9 4 4 A J10 J11 J12 Figure A 7 DBX960S 3 FS Wide SCSI Horizontal Distribution Board for use with DAC960SU Controller only Table A 7 Wide SCSI 3 Ch Horizontal Distribution Board Connectors Jumper Connector Description P1 Edge Connector DAC960SU Controller board J1 Fault Indication Drive Channel 0 J2 Fault Indication Drive Channel 1 J3 Serial Port J4 Reserved DO NOT USE J5 AEMI Array Enclosure Management Interface Port J6 Configuration Jumpers J7 Not used J8 FAST WIDE Ultra SCSI Connector Drive Channel 0 J9 FAST WIDE Ultra SCSI Connector Drive Channel 1 J10 Power Connector J11 FAST WIDE SCSI Connector Host Channel 0 J12 Power Connector A 8 DAC960SU Family User Guide Serial COM Port Connector Pins Distribution Boards 6 8 10 O O O O m 3579 Figure A 8 Serial COM Port Distribution Board Connector Table A 8 Serial COM Port Distribution Board Connector Pin Signal Description 1 DCD Data carrier detect 2 DSR Data set ready 3 RXD Receive data 4 RTS Request to send 5 TXD Transmit data 6 CTS Clear to send 7 DTR Data terminal ready 8 N C No connection 9 GND Ground 10 N C No connection Ma
164. ternatively the DACCF utility or the DAC960SUI front panel also can be used for this purpose The following table lists the four different firmware files supplied on diskette with the DBI960SU daughter board One of these files can be used to flash the controller firmware for the selected application B 2 DAC960SU Family User s Manual DBI960SU Daughter Board Table B 2 Firmware Configuration Options Application Load Firmware Standard Single Host FWSC nnn Standard Dual Host FWSCS DH nnn UNIX Single Host FWSCS U nnn UNIX Dual Host FWSCS UD nnn Factory default For more detailed information on the using the firmware utilities refer to the README files on the firmware distribution diskette Daughter Board Installation Installing the DBI960SU consists of setting the termination on the daughter board and on the DAC960SU controller connecting the cables between the daughter board and the controller and plugging the assembly into the distribution board Termination termination shunts should remain ON the daughter board jumper block unless dual host mode or a differential distribution board is being used Whenever a differential distribution board is used the single ended termination on the host channel s should be disabled by removing the jumper associated with that channel This termination jumper block is J1A on the DBI960SU 76 on the DAC960SU controller Note Leave all termination j
165. the Main Screen 4 28 DAC960SU Family User Guide Configuration An audio chirp tone will sound periodically during the initialization process A loud tone will signal the end of the initialization process and the screen will display the following message INIT LUN COMPLETE The array is now ready for loading the operating system applications software and or data Manual No 771965 4 29 Configuring the Array 4 30 DACO960SU Family User Guide Chapter 5 User Interface Overview After the hardware installation the array can be configured using one of the following methods Front panel touch control keypad DAC960SUI only See Start up LCD Screen on page 5 3 e VTIOO terminal connected through the controller s serial port See Start up VT100 Screen on page 5 5 DACCF software running on a PC through the controller s serial port Refer to the DACCF User Manual Note The controller allows only one device to access menus at a time Both the DAC960SUI front panel user interface and the VT100 terminal can access the built in configuration and administration utility that resides in the controller s firmware They provides complete control and management of the controller and disk arrays eliminating the need for additional hardware or software Manual No 771965 5 1 User Interface Screen Modes User Interface Screen Modes The DAC960SU controller s distinctive operating modes are represented
166. the hard drives the DAC960SUI controller and the host system 3 20 DAC960SU Family User Guide Installation Connecting Non Disk Devices Non disk SCSI devices such as a tape drives or CD ROM drives will need to have their own unique SCSI ID regardless of the channel of the DAC960SU to which they are connected For instance the general rule for UNIX systems is to set the tape to SCSI ID 2 the CD ROM to SCSI ID 5 with both devices connected to channel 0 AN Caution Connecting non disk devices to DAC960SU drive channels can result in disk drive performance loss While the DAC960SU does support non disk devices their use on SCSI channels containing disk drives is not recommended The affect these devices have is to slow the controller s performance on that channel to the I O transfer rate of the tape or CD ROM drive instead of the much faster rates supported by most Ultra SCSI hard drives You can work around this problem by connecting the non disk devices to one channel of the DAC960SU while connecting the hard drives to the other channels However most people do not wish to give up one channel of a high performance caching disk array controller for this purpose The simple solution is to use a dedicated Bus Logic SCSI host bus adapter for connecting all non disk devices For more information on configuring the DAC960SU be sure to read the DACCF Utilities Installation Guide and User Manual Chapter 2 Configuration Strateg
167. the previous menu Manual No 771965 6 49 Configuration Menu Page Three Save Configuration Prompt Configuration Menu Alternate Screen The Save Configuration Prompt will display if the user has not saved a new or modified configuration before attempting to initialize the array or exit the Configuration Menu 96 5 Uer 9727 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 Start Initialize 1 2 Change Write Policy NTER PARAMETER Press any key to continue IHF RHATIUH Configuration has been changed but not saved Cannot execute Initialization without saving the changed configuration Config changed save before initializing Press any key Figure 6 25 Save Configuration Prompt Configuration Menu Alternate Screen 6 50 DAC960SU Family User Guide Configuration Menu Table 6 25 Save Configuration Prompt Alternate Screen Description Indication Key Description Config changed Save before initializing Prompt notifies the user that a change to the current configuration was made but not saved Press any key Prompt to clear this status screen LCD Terminal Action Key Action Key Any key Any Selection clears this message screen and displays character key the previous menu Manual No 771965 Configuration Menu Page Three Initialize Logical Unit Prompt Configuration Menu Alternate Screen The Configuration Changed P
168. tion C 5 Testing C 12 Battery Charger C 6 Battery Conditioning C 1 1 Battery Recycling C 13 Block Size 8 40 C Cable Lengths 3 12 Cables 3 1 3 8 3 9 3 13 3 14 3 18 3 19 3 21 Daughter Board B 4 Cabling 3 11 Cache 2 3 2 23 C 12 Adaptive Read Ahead Device 2 4 Write Back 2 24 Write Through 2 23 Cache Battery Backup 2 24 C 1 Cache Management 2 23 Calculating Charging Current C 14 Change Drive State 8 12 Manual No 771965 Index Change Write Policy 6 46 Checking Consistency 2 23 Command Tag Drive Channel 8 38 Configuration 4 1 Configuration Jumpers Distribution Boards 3 16 3 17 A 10 A 11 Configuration Menu 6 1 Configuration on Disk 1 2 2 4 2 9 Configuring a Logical Unit 4 14 Connecting the Daughter Board to the Controller B 5 Controller Components 2 2 Controller Diag 8 40 Controller Functions 1 2 2 1 Controller Parameter Settings 8 36 Controller Parameters 8 32 Controller Read Ahead 8 37 Controlling Standby Replacement Drives 2 21 Create Array 6 10 Create Standby 6 30 D DAC960SUI Identification 1 DACCF Software Utility 4 2 Daughter Board Requirements B 1 Daughter Board SCSI ID 3 10 Daughter Board Termination 3 10 DBI960SU Daughter Board B 1 Delete Last Array 6 28 Description see Product Descrip tion Disk Failure Detection 2 22 Disk Media Error Management 2 22 Disk Striping see Striping Distribution Board Horizontal 3 13 Index 1 Distribution Boards 3 5 3 6 1 14 Differentia
169. tion about an individual drive Change Drive State Menu selection that allows user to set a drive operational state to online dead or standby Indicator arrow marks active selection zy LCD Terminal Action Key Action Key ESC Esc Displays the previous screen main menu K1 sho 1 Invokes the Show Drives function K2 inf 2 Selects the Drive Information function K3 str 3 Selects the Change Drive State function K4 nxt N Selects the next page of Toolkit menu selections Enter Enter Invokes the submenu selection or function indicated by the selection arrow Manual No 771965 8 3 Toolkit Menu Page One Show Drives Function The Show Drives function provides drive status information at a glance Dbac9 us AHB Uer 2777 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 Show Drives Drive Information Change Drive State HTER PARRAHETER Press any key to continue INFORMATION Channel 8 Status ONL ONL ONL SBY LUN a a e CHO St OO OSDW LN nnnnnn Press any key Figure 8 2 Show Drives Screen 8 4 DAC960SU Family User Guide Toolkit Menu Table 8 2 Show Drives Description Indication Key Description CH n Number indicates which SCSI channel is displayed St x x x Indication shows the state of each SCSI drive on the channel SCSI IDO First position SCSI ID 1 Second position SCSI ID 6 L
170. to the JP1 connector on the DBB960S module Reinstall the DAC960SU disk array controller 7 Power on the system and boot the operating system Run the DACCF configuration utility and select Enable Battery Backup in the Advanced Functions Hardware Parameters menu 9 Reboot the system 10 Prepare the battery and set up the cache write policy as described in the Operation section in this manual C 10 DAC960SU Family User Guide Battery Backup Unit Operation Proper operation of the DBB960S battery backup module depends on the satisfactory conditioning of its rechargeable battery and on the correct set up of the DAC960SU controller cache write policy This section will discuss these functions Battery Conditioning Prior to Use Nickel Cadmium batteries need to be conditioned before they are placed into operation If the battery is furnished partially charged and is then immediately recharged it has a tendency to develop a memory of the shortened charge time This produces the effect of having a battery with a reduced capacity To prevent this from occurring the battery should be completely discharged before it is put into operation The following procedure is recommended prior to the first use of the DBB960S battery backup module This procedure should also be followed any time after a power failure that causes the battery backup module to maintain cache memory for a significant duration 1 Power on the system long enough for t
171. troy the existing configuration Cur cfg will change yes no 16 Select yes to save the configuration Select no to cancel the selections 17 Continue to the next procedure Initializing the Logical Unit on page 4 25 4 24 DACO960SU Family User Guide Configuration Initializing the Logical Unit INITIALIZE LUN Select the Configuration Menu QUICK REFERENCE Select the Start Initialize function Select the LUN Start the initialization 1 Select Configuration by pressing the button under the controller Configuration Menu cfg prompt or pressing 1 Press Enter The following menu choices are displayed 0809605 ANB Uer 2777 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 1 Get Configuration 2 Show Configuration 3 Create Array ENTER PARAMETER E INSTRUCTION Enter option N for more options lt Esc gt for previous menu INFORMATION Get Configuration Show Configuration Create Array get show crt nxt 2 Press the button under the nxt prompt or press n until the following page is displayed Manual No 771965 4 25 Configuring the Array 0809605 2777 CONFIGURATION ADMINISTRATION IMESSRGE PTIONS 1 Start Initialize 2 Change Write Policy ENTER PARAMETER INSTRUCTION Enter option N for more options lt Esc gt for previous menu INFORMATION
172. tware ROM based firmware or any other PRODUCT developed or manufactured by any third party whether included with this PRODUCT or not Such warranty or warranties as are provided by third parties to the extent permitted thereby shall be made available and are hereby assigned by MYLEX to the purchaser of this PRODUCT If MYLEX issues a revision to the BIOS firmware or software included with this PRODUCT within 30 days of your purchase MYLEX will replace such firmware at no charge except handling fees Out of Warranty Service Mylex products which are ineligible for warranty service may be serviced by MYLEX according to our standard price list as modified from time to time A current copy of the standard price list is available from the Technical Support Department Limitation of MYLEX Liability MYLEX s liability arising from the sale use and disposition of this PRODUCT shall in no event exceed the amount paid to MYLEX for this PRODUCT MYLEX assumes no liability for damages arising from the use or failure of any MYLEX product The WARRANY DESCRIBED ABOVE CONSTITUTES THE ONLY WARRANY MADE BY MYLEX MYLEX EXPRESSLY DISCLAIMS ANY AND ALL OTHER WARRANTIES OF ANY KIND WHATSOEVER WHETHER EXPRESSED OR IMPLIED INCLUDING WARRANTIES OF MERCHANT ABILITY AND FITNESS FOR A PARTICULAR PURPOSE WHICH ARE HEREBY EXPRESSLY EXCLUDED IN NO EVENT WILL MYLEX BE LIABLE FOR INCIDENTAL SPECIAL OR CONSEQUEN TIAL DAMAGES INCLUDING WITHOUT LIMITATION LOSS OF D
173. ual Options DBI960SU Daughter Board 3 channel upgrade DBB960S 650 Battery Back up Module with 650 mA battery User Supplied Items Suitable enclosure cabinet or full height drive bay PC compatible power supply included with most RAID enclosures Mounting hardware required by the enclosure rails screws etc SCSI cable s to interconnect the controller with the host and the disk drives or disk arrays The following optional items may also be required depending on the application Serial communications null modem cable e 00 compatible terminal or equivalent 1 4 DAC960SU Family User Guide Specifications Controller CPU Memory Module Type Size Cache Firmware ROM Type SCSI Processors Transfer Rate Communications Serial Port Baud Rate Data bits Stop bits Parity Signals Connection RAID Levels supported Manual No 771965 Introduction DAC960SU Intel i9609 RISC 32 bit microprocessor DRAM 60ns 72 pin SIMM n x 36 from a qualified vendor list contact customer service for a list of approved memory components Minimum 4 MBytes 1 x 36 Optional 8 16 32 64 or 128 MB Write Selectable Write Through or Write Back Read Always enabled Flash EEPROM 256K x 8 Symbios Logic 53C770 one per channel Up to 40 MBytes second burst rate synchronous Up to 25 MBytes second sustained rate synchronous One asynchronous 10 pin RS232 19 200 8 2 None T
174. ult 5 Reserved Leave at Default N A Default 6 Serial Port Protocol VT100 SLIP Default 7 Serial Port Baud Rate 19 2K Baud N A Leave at Default 8 Reserved Leave at Default Default N A 9 Host Channel 1 SCSI ID bit 0 Bit 0 set Bit 0 clear Default 10 Host Channel 1 SCSI ID bit 1 Bit 1 set Bit 1 clear Default 11 Host Channel 1 SCSI ID bit 2 Bit 2 set Bit 2 clear Default 12 Host Channel 1 SCSI ID bit 3 Bit3 set Bit 3 clear Default Second host channel is not available on the Differential UDR Distribution board Table 3 9 Host Channels 0 or 1 SCSI ID Settings Bit 0 Bit 1 Bit 2 Bit 3 SCSI Host 0 Pin 1 Host 0 Pin 2 Host 0 Pin 3 Host 0 Pin 4 ID Host 1 Pin 9 Host 1 Pin 10 Host 1 Pin 11 Host 1 Pin 12 0 Off Off Off Off 1 On Off Off Off 2 Off On Off Off 3 On On Off Off 4 Off Off On Off 5 On Off On Off 6 Off On On Off 7 On On On Off 8 Off Off Off On 9 On Off Off On 10 Off On Off On 11 On On Off On 12 Off Off On On 13 On Off On On 14 Off On On On 15 On On On On Manual No 771965 3 17 DAC960SUI Installation Setting SCSI Channel Termination DAC960SUI Termination jumpers are found on the DAC960SU disk array controller board located inside the DAC960SUI controller housing Near the front edge of the controller board is a set of jumpers labeled J6 These jumpers control the termination for each of the SCSI channels WARN
175. umpers ON when using single ended distribution boards with the DAC960SU The SCSI bus must be terminated at both ends of the cable Typically one end is terminated at the host bus adapter and the other end is terminated on the last device or on its enclosure Note When using differential SCSI external termination must be provided and the on board termination must be disabled Manual No 771965 B 3 Daughter Board Installation Host Channel Termination Jumper Figure 2 DBI960SU Table B 3 Jumper Settings Shunt Description Pin 1 Termination of Disk Channel 2 Pin 2 Termination of Disk Channel 3 Pin 3 Termination of Host Channel 1 or Disk Channel 4 Pins 4 amp 5 DO NOT USE Installing the Cables and Daughter Board If the DAC960SU controller is already installed power down the entire system and remove the controller 1 Connect the flex cables to J2 and J3 on the DBI960SU daughter board and route the cables through the slots in the daughter board WARNING Make sure the correct end of the flex cables are connected to the daughter board Both ends of each flex cable are labeled to tell which end goes to the DBI960SU daughter board and which end goes to the DAC960SU controller Incorrect orientation of these cables will cause damage to the daughter board the controller or both B 4 DAC960SU Family User s Manual DBI960SU Daughter Board
176. ures Available with all Firmware Versions Enhances SCSI Performance Ultra SCSI channels provide high performance data transfers at up to 40 MB second Tagged command queuing to the host allows processing of up to 255 simultaneous data requests Intelligent adaptive read ahead to allow most efficient use of cache User defined performance tuning through selectable cache write policy and variable stripe width User defined rebuild priority to optimize controller performance during automatic or manual rebuild cycles Disconnect reconnect capability for enhanced performance and SCSI bus optimization 1 2 DAC960SU Family User Guide Introduction Manages RAID SCSI Disk Arrays Supports multiple RAID levels 0 1 3 5 and 0 1 allowing you to select the desired combination of storage capacity data availability redundancy and I O transfer performance for any data application Complete RAID Ultra SCSI array configuration and management without special software or drivers Supports all popular operating systems and network environments because it works independently from the operating system Connects up to 35 SCSI drives using optional daughter board Drives can be grouped and managed as a single very large capacity disk drive up to 2TB as multiple large capacity drive groups or as individual disk drives Industry standard Fast 20 Wide SCSI 3 Ultra SCSI interface supports any SCSI hard disk drive Flexible Us
177. urrently part of the controller s configuration On start up the configuration information is read from the controller This information is used to scan and detect all physically connected and responding drives The result is compared with the reference configuration stored on the controller If a configuration matches it is selected for use If there is a mismatch the unidentified device is assumed to be new If all drives connected to the controller are unidentified the entire configuration is assumed to be new and a manual configuration from the front panel VT100 terminal or the DACCF utility needs to be invoked Manual No 771965 2 9 Drive Organization The selected configuration becomes the basis for a device translation table This table is generated during the verification scan Configuration headers are read at this time to determine if any drive slot target ID changes cable swaps or controller changes have occurred since the last verification scan At this time it is also determined whether or not any drives are missing An attempt is made to map any missing drive to its original slot If a legal configuration cannot be created an installation abort condition occurs manual configuration from the front panel a VT100 terminal or the DACCF utility needs to be invoked in this case For more information refer to the DACCF Utilities Installation Guide and User Manual Start Read NVRAM Scan physical dri
178. ve did not format correctly Number pairs indicate the SCSI ID ofthe drive about which format status is being reported Press any key Prompt for user action to clear this status screen LCD Terminal Action Key Action Key Any key Any Displays the previous menu character key Manual No 771965 Toolkit Menu Page Two Controller Parameters The Controller Parameters function displays the current state of various controller settings It allows the user to change these settings with predefined optional settings WARNING Saving parameter changes causes the controller s working parameters to change This can produce unpredictable results if it occurs during host drive activity All activity to the controller should be stopped before saving parameter changes DAC960S HB Ver CONFIGURATION ADMINISTRATION MESSAGE 2 1 Format Drives 2 Controller Parameters 3 Controller Diagnostics NTER PARAMETER INE INSTRUCTION Press spacebar to change lt Esc gt to quit lt Enter gt for next parameter TMFORMATION Prompt Message varrable Prompt message variable chg Figure 8 16 Controller Parameters Screen 8 32 DAC960SU Family User Guide Toolkit Menu Table 8 16 Controller Parameters Description Indication Key Description Prompt Message indicates controller parameter to be displayed varia
179. ves Any valid configs No Use Use configuration DACCF on disk utility COD Figure 2 4 Configuration on Disk Flowchart 2 10 DACO960SU Family User Guide Functional Description RAID Management RAID is an acronym for Redundant Array of Independent Disks The DAC960SU controller implements several different versions of the Berkeley RAID technology and two special versions that are specific only to the DAC960 family of RAID controllers Each version referred to as a RAID Level supported by the DAC960SU controller is shown in Table 2 2 An appropriate RAID level is selected when the logical units are defined or created This decision is based on disk capacity data availability fault tolerance or redundancy and disk performance The DAC960SU controller makes the RAID implementation and the disks physical configuration transparent to the host operating system This means that the host operating system drivers and software utilities are not affected regardless of the RAID level selected Correct installation of the disk array and the DAC960SU controller requires a proper understanding of RAID technology and the concepts described in this chapter and in the DACCF Utilities documentation Table 2 2 Supported RAID Levels RAID Drives Array Level Description Min Max 0 Block striping is used which yields higher performance 2 8 than with individual drives There is no redundancy
180. vides the device mapping and decode for the non volatile memory and the electronically erasable programmable read only memory flash EEPROM Controller Firmware The DAC960SU firmware contains the programs executed by the 1960 CPU The firmware resides in the on board Flash EEPROM This memory device retains information even after power is off and can also be re written to allow the controller firmware to be upgraded without the need to replace any hardware chips In addition to the stored programs in EEPROM the NVRAM stores data on the current configuration of the controller and its attached disk drives As the disk drive configurations change for example when a drive fails the NVRAM keeps a record of the changes Manual No 771965 2 3 Controller Functions Configuration on Disk Configuration on Disk COD is provided in controllers using firmware 2 5 and above COD allows a DAC960SU to detect certain hardware changes when they occur and to automatically reconfigure according to that change Automatic reconfiguration occurs after hardware changes such as Change of controller card in the event of a controller failure or if a controller with more channels is needed Change of target IDs relocating drives or replacement of drives Interchange of cables A drive failure that occurs during a power down The configuration information is stored in the controller NVRAM and in the last 16 sectors of every workin
181. x Rx CTS RTS DSR DTR DCD RI Null modem cable user supplied RAID 0 Striping RAID 1 Mirroring RAID 3 Parity through put oriented RAID 5 Parity transaction oriented RAID 0 1 Striping and Mirroring Mylex RAID 6 JBOD Single drive control Mylex RAID 7 1 5 Specifications Electrical requirements Input Power Environmental Temperature Humidity non condensing Altitude 1 6 12V 596 100 mA 5V 5 2 5 Amp w 4MB memory 5V 5 3 5 Amp w 16MB memory 1 Supply currents assume drives feeding term power Operating Storage Operating Non operating Operating Non operating 0 C to 50 20 C to 70 C 10 to 90 rh 10 to 90 rh Up to 10 000 ft 3 048 m Up to 50 000 ft 15 240 m DAC960SU Family User Guide 2 Functional Description Controller Functions The Mylex DAC960SU is a high performance Ultra SCSI to Ultra SCSI Disk Array Controller When properly configured the DAC960SU can provide non stop service with a high degree of fault tolerance through the use of RAID technology and advanced array management features The DAC960SU Disk Array Controller connects to the host system through an Ultra SCSI interface The SCSI interface on the host may be located either on the system board or on a plug in host bus adapter HBA card DAC960SUI Drive Channel 0 Host Channel 0 Narrow Wide or Wide Beal Controller Wire SES lt
182. y following these steps 1 Initiate an operation such as a copy of a file to a dummy file and power off the system before the cache has time to be flushed approximately 4 seconds 2 Power on the system 3 Check to see if the dummy file exists If so the battery backup module was able to keep the cache intact To further test the integrity of the battery backup module compare the original file with the copy Removing the Battery Backup Module If the DBB960S Battery Backup Module needs to be removed from service follow this procedure Power off the system 2 Remove the DAC960SU controller with the battery backup module AN Caution Use proper electrostatic protection procedures when removing the DAC960SU controller from the system C 12 DAC960SU Family User Guide Battery Backup Unit 3 Remove the screw s holding the battery backup module onto the controller and pull the battery backup module straight off the DAC960SU connector 4 Insert the loopback plug into the DAC960SU BBU connector AN Caution The DAC960SU will not operate without a correctly installed loopback plug or a BBU If the loopback plug is installed it must be oriented with the white triangle facing the Pin 1 reference designator on J2 Recycling the Battery The onboard battery that comes with the DBB960S battery backup module has the logo of the Rechargeable Battery Recycling Corporation RBRC stamped on it The recycling fees have b
183. y the default negation method Active Negation Disabled Controller Read Ahead The Controller Read Ahead function improves data retrieval performance by allowing the controller to read into cache a full stripe of data at a time This greatly improves the percentage of cache hits For example if the stripe size is set to 8k and the host requests of data when this function is enabled the controller will read ahead the full 8k When the host requests the next 1k block that data will already be in the controller s cache This function should remain enabled during normal controller operation Manual No 771965 8 37 Toolkit Menu Page Two Super Read Ahead The Super Read Ahead function increases performance for applications that must access large blocks of sequential data This function incorporates intelligent data request monitoring to track data requests by the host With Super Read Ahead enabled the controller detects requests for data that are stored in sequence on the drives It reads the data into the cache so that the cache remains at least one request ahead of the host This function should remain enabled during normal controller operation Command Tag Drive Channel The Command Tag Drive Channel function controls the SCSI command tag queuing support for each drive channel This function should normally remain enabled Disable this function only when using older SCSI drives that do not support command tag queuing F
184. ys the previous menu screen K3 Num keypad Increments the drive SCSI ID number Num keypad Decrements the drive SCSI ID number Enter Enter Selects the drive to rebuild invokes the Rebuild process and displays the next screen Manual No 771965 Administration Menu Page One Rebuild Status Start Rebuild Page Three DAC9GOS AWB Uer 27727 CONFIGURATION ADMINISTRATION MESSAGE OPTIONS 2 1 Rebuild Check Rate 2 Start Rebuild 3 Start Parity Check ENTER PARAMETER INSTRUCTION INFORMATION Rebuild Started Rebuild started Press any key Figure 7 6 Rebuild Status Start Rebuild Page Three 7 12 DAC960SU Family User Guide Administration Menu Table 7 6 Start Rebuild Page Three Description Indication Key Description Rebuild started Message indicates that the Rebuild process is started Press any key Prompt for user action to clear this status screen LCD Terminal Action Key Action Key Any key Any Displays the previous menu rebuild process character key continues in background mode until completed Note An audible alarm beep sounds periodically until the Rebuild process is complete Status indication showing the completion percentage of the Rebuild is displayed on the monitor mode main title screen Manual No 771965 Administration Menu Page One Start Parity Check The Parity Check fu

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