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RA81 . Disk Drive User Guide

1. 2 35 2 42 Power Controller AC Receptacles 2 36 2 43 Connecting Cable Clamps to Uprights 2 37 2 44 Cable Routing and Clamping 2 38 2 45 Diagnostic Terminal 2 40 3 1 Front Panel Controls and Indicators 3 1 3 2 Cam Coded S witch COVED eroe e pas RUSSE E xS 3 5 3 3 AUT Per REMOVAal 355 oot ade te us 3 7 1 Field Service Diagnostic Terminal 1 TABLES 1 1 Related Documentation pea E ace goo qe sad eS 1 8 1 2 RAS Sp cifications PC 1 9 1 3 RABI See S TA de 1 13 3 Indicator Conditions 123 vor IS Seas AST EOS E eet De 3 2 3 2 Drive Front Panel Fault Identification 3 3 1 INTRODUCTION 1 4 PURPOSE AND SCOPE This manual describes the 81 Disk Drive and tells how to install checkout and operate the equipment This manual is written primarily for the 81 user except for Chapter 2 which is only for qualified field service personnel 1 2 GENERAL INFORMATION The RA81 is random access moving head disk drive with non removable media using a head disk as
2. 2 20 2 24 Chassis Slide Bracket 2 21 2 25 Mounting Chassis Slide to Front 2 22 2 26 Mounting Chassis Slide to Back 2 22 2 27 Mounting the Electrostatic Discharge Bracket 2 23 2 28 Installation of Cable Retainer Springs 2 24 2 29 Installation of Drive Detent Latch 2 24 2 30 Installation of Drive Mounting Rails 2 25 2 31 Removal of HDA Cable 2 26 2 32 HDA Positioner Lock uu say laga SUAE YA aig 2 27 2 33 Extending Cabinet Stabilizer 2 28 2 34 Extending the Chassis Slides xpi E baa Bale eens 2 28 2 35 Wing Pivot Assembly cos ue sawu REA 2 29 2 36 Electrostatic Discharge Bracket Details 2 30 2 37 Cabling for a Two Drive System 2 3 2 38 Cabling for a Three and Four Drive System 2 32 2 39 Connecting SDI Cable Shield Terminators 2 33 2 40 Mounting the Bulkhead Assembly 2 34 2 41 Drive Sequence Cable Installation
3. unto Ht pun HHB ns usn nuno Hu DRIVE CABINET HH CPU CABINET i I HH BACK LOCKING BRACKET 2 0746 Figure 2 19 Installing the Back Locking Brackets 2 3 2 External SDI Cabling Procedure Both internal and external SDI cables are mounted in the I O bulkhead assembly Internal SDI cables connect to the top of the bulkhead and external cables connect to the bottom Refer to Figures 2 20 and 2 21 The procedure for connecting the internal SDI cables is discussed in Paragraph 2 4 7 The external SDI cables must be installed between the central processing unit CPU cabinet I O bulk head connector and the drive cabinet I O bulkhead connector The CPU 1 bulkhead connector should have already been installed If not refer to the installation procedure in the appropriate disk drive control ler user guide When the CPU cabinet I O bulkhead connector has been installed follow the instructions in the appropriate disk controller user guide to install the SDI cables at the CPU cabinet Use the following procedure to install the external SDI cables Plug the external SDI cable into the Port A receptacle on the bulkhead External SDI cables enter from the bottom 2 Install the two screws that hold the SDI cable shield terminator in place and tighten them Refer to Figure 2 20 2 17 INTERNAL SDI CABLES SEQUENCE BOX ASSEMBLY CABLE S
4. 2 5 2 6 Leveler Adj stment 2 ul dca Pa Dx Od ade e eu wie RE 2 6 FIGURES Cont 2 7 Raising the Drive Logic Chassis Assembly 2 7 2 8 Foam Pad REMOVAL d cue Sx 2 7 2 9 HDA Details ws wantuna pa AUR 2 8 2 10 Belt Tension ever pst ole RERUM Ma ee eee eee ay 2 9 2 11 Belt tension Lever and Interlock Switch 2 10 2 12 End Panels and Joiner Panels zu l obese Rev RR VAT RR 2 11 2 13 Opening the Back Door 2 11 2 14 Back Door and End Panel Lock Removal 2 12 2 15 End Panel and Bottom Key Button 2 13 2 16 Connecting the Cabinets y uu a eee go Y 2 14 2 17 Removing the Trim Panel Brackets 2 15 2 18 Installing the Front Locking Bracket 2 16 2 19 Installing the Back Locking 2 17 2 20 SDI Cable Shield Terminator Installation 2 18 2 21 Single Drive External SDI Cables 2 19 2 22 Drive Unit Address Plug iussu decorar fuese e bu weed ee ba Awe eee E NER Td 2 19 2 23 Removing Cabinet Trim Panels
5. Removing Internal Shipping Brackets and Packing Material SOAM ELA 2 6 RASIINSTALLATION E rua 2 10 Connecting quiate eo 2 10 External SDI Cabling 2 17 Programming the Drive Unit Address Plug 2 19 RA81 ADD ON 2 20 Remove the Front Trim 1 2 20 Install the Slide Assembly ev baba eee 2 21 Remove the Internal Shipping Brackets and Packinp Material 26 sorge eeo qoM a uu kasuq RA EUR CM 2 25 Mount the 81 on the 5 4 5 ese 2 25 Program the Drive Unit Address Plug 2 30 Connect the Electrostatic Discharge Bracket 2 30 Install the Internal SDI Cables 2 31 Mount the Bulkhead 2 33 Install the Drive Sequence Cables 2 33 lli 2 INSTALLATION Cont 2 4 10 Connect Power 4 alex ex ER p qual e eq 2 36 2 4 11 and Clamp 2 36 2 9 RA81 DRIVE DIAGNOSTIC CHECKOUT 2 38 2 5 1 The Diagnostic Terminal
6. S 2 CONTROL CHARACTERS npa nt apo dns A 2 4 CONTINUE CONT AND CLEAR CLR KEYS A 2 A 5 XON X OPE KEYS A5 y suyu 2 6 eer Rees DI eee aa p A 2 DISPLAY SCROLL SWITCH gs rea OCA Te eu A 2 A 8 BREAK KEY dasha atau aos A 3 A 9 CR KEY CARRIAGE RETURN 2254555 ERA 3 10 ESCAPE KEY A 3 FIGURES 1 1 The RASI Drives osses secere aaa u EAM REN S 1 3 1 2 Basic 81 Disk Subsystem Block Diagram 1 4 1 3 Hinged Circuit Module Arrangement 1 5 1 4 Single Port Multi Drive Configuration 1 6 1 5 Dual Port Configuration au De 1 6 1 6 HDA Head Em 1 7 1 7 Format vis c oodd ode det 1 7 2 1 81 Electrical Plugs and Receptacles 2 2 2 2 Unpacking a System on a Shipping 2 3 2 3 Building the Ramp voeem nce eR RA EUR DA EE OQ 2 4 2 4 Shipping Bracket Removal 2 5 2 5 Cabinet Leveler Installation
7. cabinet 81 2 UDASO cabinet RAS81 CD 2 UDASO cabinet 2 INSTALLATION 2 1 SITE PREPARATION AND PLANNING A certain amount of preparation and planning is necessary before installing the RA81 Disk Drive The paragraphs that follow discuss some of the points that should be considered 2 1 1 Environmental Considerations The RASI is designed to operate in a business or light industrial environment Temperature humidity and altitude limits must be considered before the drive is installed Refer to Table 1 2 for figures on environ mental characteristics 2 1 2 Cleanliness Because the 81 has a sealed HDA dust particles should not be able to enter the area where the record ing media is located However it is still desirable that the equipment be operated in the cleanest environ ment possible 2 1 3 Floor Loading The weight of one RA81 cabinet and disk drive is approximately 148 8 Kg 328 lb with each additional drive weighing approximately 67 1 Kg 148 Ibs A completely loaded 81 cabinet approximately 283 Kg or 624 lbs should not place any abnormal stress on a raised computer room floor However the weight of existing equipment should be considered before installing additional drives 2 1 4 Heat Dissipation The heat dissipation of each RA81 may reach approximately 2200 Btu hour The approximate cooling requirements for the complete system can be computed by multiplying this figure by the number o
8. on the mi croprocessor module and the slave is located on the servo module One microprocessor handles real time functions such as servo control while the other controls status checking Both microprocessors share the diagnostic responsibilities eC RR 2 0775 Ive 1 1 The Disk Dr igure F 1 3 TO FROM CPU SDI CONTROLLER SDI CABLES Figure 1 2 Basic RA81 Disk Subsystem Block Diagram ADDITIONAL DRIVES 2 0730 1 5 RAS81 SPECIFICATIONS Table 1 2 gives the primary performance power environmental and physical characteristics of the RA81 Disk Drive NOTE The term operating under the specification section of the table indicates those values that must not be exceeded while the drive is operational The term non operating indicates those values that must not be exceeded when the drive is being stored or in a non operating condition Exceeding these values can damage the drive when power is applied Adhering to these values ensures that the drive operates correctly when power is applied Table 1 2 RA81 Specifications Characteristic Data storage capacity Single drive 16 bit word format Media type Head disk assembly HDA Number of disks Disk surfaces Number of heads groups Heads per disk surface Cylinders per head Sectors per track 16 bit word format Servo system Performance characteristics Disk encoding method Linear bit density
9. 10 to 40 degrees C 50 to 104 degrees F with a temperature gradient of 20 degrees C hour 36 degrees F hour 40 to 60 degrees C 40 to 140 degrees F 10 to 85 non condensing with a maximum wet bulb temperature of 28 degrees C 82 degrees F and a minimum dew point of 2 degrees C 36 degrees F Table 1 2 81 Specifications Cont Characteristic Shipping and storage Heat dissipation Altitude Operating Non operating and shipping Power Voltage requirements Single phase 120 volt 60 Hz drives 220 240 volt 50 drives Current requirements Starting current for 120 volt ac drives Running current for 120 volt ac drives Starting current for 220 240 volt ac drives Running current for 220 240 volt ac drives Power requirements Starting power for 120 volt ac drives Specification 10 to 85 with no condensation 644 watts nominal Sea level to 2400 meters 8000 feet above sea level Note Maximum allowable temp eratures are reduced by a factor of 1 8 degrees C 1000 meters 1 degree F 1000 feet for operation at higher altitude sites 300 meters 1000 feet below sea level to 9000 meters 30000 feet above sea level actual or by means of cabin pressurization 90 128 volts ac 60 plus Or minus Hz 184 256 volts ac 50 plus or minus 1 Hz 35 ampere peak surge for 4 seconds 7 8 amperes rms at 120 volts 18 ampere peak surge for 4 seconds 3 5 amperes
10. Lower the logic chassis assembly until it latches 2 3 RAS8I INSTALLATION An Disk Subsystem consists of SDI disk controller and at least one RA81 Disk Drive To install the subsystem it is necessary to connect the disk drive cabinet to the Central Processing Unit CPU cabi net install the SDI cables and program the unit address plug If the system has more than three 815 it is necessary to join two drive cabinets together 2 3 1 Connecting Cabinets The H9642 AP AR 120 240 volt cabinet will hold up to three disk drives It comes equipped with two end panels for stand alone use If more than three drives are required a second drive cabinet may be joined to the first The H9642 BP BR 120 240 volt expansion cabinet comes with a joiner panel but no end panels The two cabinets may be joined by removing one of the end panels of the first cabinet and placing it on the the outside edge of the expansion cabinet Figure 2 12 shows the end and joiner panel locations Use the following procedure to join disk cabinets l Open the back door on the cabinet with the end panels by turning the hex lock counterclockwise Refer to Figure 2 13 2 10 JOINER PANEL END PANELS 2 0763 Figure 2 12 End Panels and Joiner Panels M BACK DOOR QUU qu jn LOCK END PANEL 2 0762 Figure 2 13 Opening the Back Door 2 11 Remove the back cabinet door by unscrewing the ground wire and pulling do
11. and dc power supply See Figure 1 1 The drive has optional slide rails and is designed to be inserted into a 19 inch wide RETMA equipment rack Up to three drives one fixed mounted and two mounted on slides can be included in a single cabinet An RASI Disk Drive subsystem is made up of SDI controller two controllers with the dual port con figuration and one or more disk drives Figure 1 2 shows the relationship between the subsystem compo nents All RA81 disk logic is included within the drive Three of the primary circuit modules servo microproces sor and personality are located directly under the logic access cover on top of the cabinet These three modules are mounted on hinges for ease of service See Figure 1 3 DC operating power for the logic circuits is provided by the drive power supply located inside the back of the drive Internal fans provide the necessary cooling for the power supply and for other drive components The 81 Disk Drive conforms to UL CSA and standards 1 3 1 Head Disk Assembly The sealed HDA contains the recording media four platters positioner read write heads and preamplifiers Seven of the platter surfaces are used for recording data The eighth has dedicated servo information used for positioning the read write heads The rotary positioner in the HDA is controlled by a slave microprocessor closed loop servo system The 81 uses both dedicated and embedded servo for h
12. be on before the drive will operate The power controller breaker regulates the application of ac power to all assemblies within the RA81 cabi net and must be turned on before the drive breaker can be effective 3 3 DRIVE OPERATION 3 3 1 Spin Up Push in the RUN STOP button on the drive front panel to spin up the drive The RUN indicator will light immediately and the READY indicator will come on as soon as the drive has completed the spin up cycle 3 3 3 Spin Down Release the RUN STOP button out position on the drive front panel to stop the drive The READY indicator will go off immediately and the RUN indicator will go off as soon as disk rotation stops 3 3 3 Removing RA81 Power Do a spin down as described above After the RUN indicator has gone off turn the drive breaker on the back panel off and disconnect the cord going to the power controller This will remove all power to the drive 3 4 CUSTOMER CARE The air filter in the logic chassis assembly should be inspected and cleaned every six months 3 41 Air Filter Removal To remove the air filter proceed as follows 3 6 1 down the access door on the front bezel of the drive Refer to Figure 3 3 NOTE The hinge mechanism can be damaged if tools are placed on the open access door or if it is leaned on 2 Take hold of the filter material and pull outward until it is free of the bezel 3 4 2 Cleaning 1 Wash the foam air filter in warm water using a mild detergent 2 Ri
13. conjunction with tle removal of the old Belt Actuator assembly The new Motor assembly 60HZ 70 21173 01 50HZ 70 21173 02 will only work with the new Lower Chassis configuration The new part numbers are cleaerls merked on the new Part 2 The Belt Tension Actuator Has been rerlaced the Belt Tension Harness sassembls This eliminetes the wechanicol model of the Belt systems definite reliability and noise improvement This echange also incorroretes changes to the Belt Tension Micro Switch assesmblwu 3 Roth 12 12655 06 and 50HZ 12 12635 07 Relts heve been chansed The new Part number ere merked on the rert 4 The Ges Srrinss 12 17072 00 have been rer rlaced with Locking Damrer 12 24693 03 9 POWER SUFFLY CHANGES 1 The H7660 Fower SuPPly revision F or an H7660 will be needed to surrort these Products H76450 Power Supplies below rev F will work in these newer Drives Sheet metal changes to the Rear Panel of the Surrly ere reauired for installation of any Fower Surrly below revision All Field Service H7660 Power SurPlies will be ursroded to revision us thes ere rereired The H7660 C D Fower SurPlus will fit sns drive and future drives MICROPROCESSOR MODULE STANDOFF CHANGES Doe design change in the Urrer Losic assembly there are currently two 2 to att
14. cy veces oie e eme a he 2 38 2 212 Applying Power to Drive 2 39 25 3 Checkout shee yama u d 2 30 CHAPTER 3 OPERATING INSTRUCTIONS 3 CONTROL PANEL SWITCHES AND INDICATORS 3 1 3 1 1 RUN STOP Switch and Indicator 3 2 3 1 2 FAULT Switch Indicator 3 3 3 1 3 UNIT READY tote Qhura sea sab di eds 3 5 3 1 4 WRITE PROT descent uar us bane ee und 3 5 3 1 5 A and Port Select 3 6 3 2 CIRCUIT BREAKERS ns EDI CE Qu 3 6 3 3 DRIVE OPERATION 15 verd 3 6 3 35 ees qoo eos he Ree due Gee 3 6 3 3 2 SPIN DOWN Asta es bee doe x SEA es 3 6 3 3 3 Removing RA81 eee ke 3 6 3 4 CUSTOMER CARE REPE REB Sa UI eee e atas 3 6 3 4 1 A Filter cee keane Cees oes Renee Ke eee E 3 6 3 4 2 Bek eat tna dea i c 3 7 3 4 3 Replacement a 3 7 APPENDIX A DIAGNOSTIC TERMINAL INSTRUCTIONS A 1 INTRODUCTION o ubera se mean as TEE EP E Pu 1 2 SHIPT KEY
15. nails from the bottom of the ramp Connect the ramp support block to the front of the shipping pallet with the lag screw Nail the ramp to the top of its support block using the two nails provided 2 3 PALLET RAMP SUPPORT BLOCK NAILS 2 0735 Figure 2 3 Building the Ramp WARNING At least two persons will be needed to perform the next step of this procedure because of the weight of the cabinet 4 Remove the four wooden blocks under the drive cabinet 5 Carefully roll the drive cabinet down the ramp 2 2 2 Installing the Cabinet Levelers Use the following procedure to install the cabinet levelers 1 Wheel the equipment cabinet to the correct location before installing the levelers 2 Unbolt and remove the four red shipping brackets and leveler nuts as shown in Figure 2 4 3 Assemble the four levelers as shown in Figure 2 5 Screw each leveler through the nut until it may be positioned into place without raising the cabinet See inset in Figure 2 5 o 5 5 5 LEVELER NUT RED SHIPPING BRACKET REMOVE BOLT 2 0566 1 2 LEVELER NUT S rd 2 FLAT WASHER SS LOCK WASHER HEX NUT a T 2 0736 Figure 2 5 Cabinet Leveler Installation Slide the leveler into the slots in the cabinet as shown Screw the leveler down until solid contact is made with the floor See Figure 2 6 Adjust until the cabinet is level 2 5 LEVELER 2 0737 Figure 2 6 Leveler Adjustm
16. pallet 1 Cut the outside shipping straps and lift the cover off the carton 2 Remove the two unloading ramps packed on of the disk cabinet 3 Remove the shipping carton and all associated packing materials 4 Check the cabinet associated equipment for external damage Report any damage to the DIGITAL field service or sales office and to the local carrier NOTE Keep all packing materials and receipts in case a damage claim is filed 5 Remove the four shipping bolts that fasten the drive cabinet to the pallet Refer to the insert in Figure 2 2 6 Slide the shipping brackets off the cabinet levelers 7 Attach the two unloading ramps to the pallet by fitting the grooved end of each ramp board over the mating metal strip on front of the pallet See Figure 2 3 8 Screw the cabinet levelers Figure 2 4 all the way up so that the cabinet rests on the rollers WARNING Two persons are needed to perform the next step due to the weight of the cabinet 10 11 Page 5 Carefully roll the drive cabinet down the ramps Wheel the cabinet to the desired location Adjust the levelers downward until solid contact is made with the floor and the cabinet is level Figure 2 4 CHANGE NOTICE Replace Figure 2 2 in RA81 User Guide EK ORA81 UG 001 with this figure UNLOADING RAMPS COVER SHIPPING STRAPS POLY BAG CX 393A Figure 2 2 Unpacking the Disk Cabine
17. start automatically about 30 seconds following the end of the hardcore test sequence Allow about 30 seconds for the execution of these tests Observe the microproces sor LEDs for a display of a hexadecimal E7 after a successful completion Errors are indicated by a fault code in the front panel lights Refer to the fault isolation procedures in the RA8 Service Manual Connect the diagnostic terminal to the RS232 port connector in the drive Refer to Figure 2 45 2 39 DIAGNOSTIC DIAGNOSTIC TERMINAL TERMINAL CONNECTOR POWER CONNECTOR LOGIC ACCESS LID ib MOTOR CAPACITOR d 000000000000000 v gt P307 MICROPROCESSOR MODULE IE N I gt hi TOP VIEW OF DRIVE CZ 0773 Figure 2 45 Diagnostic Terminal Connections 2 40 10 11 Key a CTRL C 1 on the terminal keyboard to place the drive in the diagnostic monitor mode A diagnostic prompt RA81 is then displayed by the terminal NOTE The drive idle loop test sequence is repeated continu ously until a CTRL C C is input The test will complete the current sequence before displaying the 81 gt prompt Depress the continue CONT key on the terminal This disables the automatic X On X Off feature of the terminal allowing the testing to be continuous Run the entire drive sequence test with the drive spun down by typing RUN DIAG on the termi n
18. 02 and P603 to the read preamplifier module on the front of the HDA 5 Connect P502 to the read write module 6 Place the belt tension lever in the engaged position See Figure 2 10 2 29 7 Turn the HDA positioner lock counterclockwise to the unlocked position 9 Slide the drive back into the cabinet 10 Adjust the drive detent latch so that it prevents the drive from sliding forward and tighten the latch screws 2 4 5 Program the Drive Unit Address Plug Program the drive unit address plug using the procedure described previously in Paragraph 2 3 3 2 4 6 Connect the Electrostatic Discharge Bracket The electrostatic discharge bracket grounds the disk drive to the cabinet To complete this ground path the bottom left screw on the drive power supply should be removed This same screw should then be inserted through the electrostatic discharge bracket and screwed back into place as shown in Figure 2 36 DETENT 600000000 ELECTROSTATIC DISCHARGE BRACKET L e fof Y LEFT BACK OF DISK DRIVE NOTE 1 REMOVE POWER SUPPLY SCREW TO SLIDE DRIVE FORWARD REPLACE SCREW THROUGH BRACKET EACH TIME THE DRIVE IS SLID BACK INTO CABINET 2 0755 Figure 2 36 Electrostatic Discharge Bracket Details CAUTION This ground connection must always be made before the drive is operated To slide the drive forward remove the screw that holds the electrostatic discharge bracke
19. A B programmable operation When the Port A button is pushed in and the Port B button is out only Port A can be accessed by the controller During the opposite condition only Port B can be accessed However when both push buttons are in at the same time either Port A or Port B can be accessed by the controller When either or both buttons are out the drive is off line to the port or ports indicated The drive will indicate that it is on line to controller A by lighting the A switch on line to controller B by lighting the B switch or not on line to either controller by leaving both lights off During normal operation the indicator lights will never be on at the same time The on off conditions of the port indicator lights do not always follow changes in switch positions immediately For example if the drive is on line to controller A the indicator light for A will be on If the switches are then reset for access by controller B the A indicator will stay on until the drive is actually on line to controller B Then and only then will the indicator lights change state 3 20 CIRCUIT BREAKERS Each disk drive has a circuit breaker on the back panel as well as a breaker on the back of the power controller in the bottom of the cabinet Access to these breakers is through the back door of the cabinet The breakers on the drive control the application of ac power to the drive dc power supply the cooling fans and the spindle motor This breaker must
20. ASS PERMIT NO 33 MAYNARD MA POSTAGE WILL BE PAID BY ADDRESSEE Digital Equipment Corporation Educational Services Quality Assurance 12 Crosby Drive BU EOS8 Bedford MA 01730 No Postage Necessary if Mailed in the United States Digital Equipment Corporation Bedford 01730 EK ORA81 UG CN2 TECHNICAL DOCUMENTATION CHANGE NOTICE Addendum to RA81 Disk Drive User Guide EK ORA81 UG 001 This change notice updates information in the RA81 Disk Drive User Guide EK ORA81 UG 001 This addendum notifies our customers that the disk drive can only be on line to one controller at a time when two controllers are connected in a dual port arrangement This addendum also provides a new unpacking procedure for the new shipping pallets and unloading ramps This information replaces the previous change notice EK ORA81 UG CN1 Copyright Q 1984 by Digital Equipment Corporation All rights reserved Printed in U S A Digital Equipment Corporation Colorado Springs Colorado 80919 Page 2 CHANGE NOTICE Replace section 1 3 3 in the RA81 User Guide EK ORA81 UG 001 with this new section 1 3 3 1 3 3 Dual Port Capability Multiple disk drives the number depends on the type of controller used be operated from a single controller for added storage capacity Figure 1 4 Also a dual port feature permits second controller to be connected to a subsystem Figure 1 5 When two controllers are
21. Bytes per track unformatted Transfer rate Bit cell period Read initialization time Write to read recovery Specification 456 MB Winchester double density 4 7 data 1 servo 14 data 1 servo 2 1258 numbered 0 through 1257 52 Dedicated and embedded 3 2 11 400 bpi 8550 flux changes per inch at inner group 36 352 17 4 megabits per second 57 ns nominal 10 microseconds ex cluding data separator sync Table 1 2 RASI Specifications Cont Characteristic Read to write recovery Data separator synchronization Rotational latency Rotational speed Average rotational latency Maximum rotational latency Head switch latency switch on a given cylinder Average seek One cylinder Maximum seek Disk rotation start stop times Start time Stop time Maximum start stop frequency Physical characteristics Drive only Width nominal Depth nominal Height nominal Weight approx Environmental limits Temperature Operating Non operating Relative humidity Operating Specification 1 microsecond 10 microseconds 3600 rpm 2 5 3 5 8 33 ms 16 66 ms 6 ms maximum 28 ms maximum 7 ms maximum 50 ms 1258 cylinders 20 seconds maximum 20 seconds maximum 6 3 minutes between cycles with drive powered up and ready during one of the 3 minute cycles 44 5 centimeters 17 50 in 67 3 centimeters 26 50 in 26 4 centimeters 10 38 in 67 1 kilograms 148 pounds
22. D ADD ON POSITION OF 3 amp 4 HIGH CABINETS Scale None CABINETS Scale None MOTE ITEM 3 9907786 00 RETAINER U NHT 19 32 ITEM 21 90077R6 00 ITEM 14 9009700 00 SCKEW SEMS TRUS PHIL 10 32 ITEM 22 9007662 00 ITEM 17 90070nH 00 CLAMP CABLE SCREW HT 11 16 ITEM 24 9006664 00 20 9072000 2 STANHOFF MALE SFEMALE HEX 10 32 Approx 6 Spacina RETAINER U NUT SPACER THREANER HEX AL 10 32 WASHER FLAT SST 1 Hole 71 24 14j Sequence Catle RAB ADD ON DRIVE Drive 7019692 Rev Level 6 THIRD RECOMMENDED CABLING IN ADD ON POSITION OF 3 amp 4 HIGH CABINETS Scale None 10 32 910 a we
23. EAD CABLE SEM SCREW RETAINER SPACER CABINET G CABLE CLAMP 11 16 INCH BACK LEFT UPRIGHT 3 22 S FLAT WASHER 0 500 OD X 0 281 ID PHILLIPS HEAD SCREW 2 4 10 32 5 8 INTERMEDIATE SLIDE MEMBER DRIVE SLIDE MEMBER NOTE 1 REPEAT FOR CHASSIS SLIDE ON RIGHT SIDE Figure 2 28 Installation of Cable Retainer Springs VIEWED FROM RIGHT SIDE OF CABINET PHILLIPS HEAD SEM SCREWS 10 32 X 1 2 KEPNUTS 10X32 CABINET BACK LEFT VERTICAL UPRIGHT CZ 0752 Figure 2 29 Installation of Drive Detent Latch 2 24 2 4 3 Remove the Internal Shipping Brackets and Packing Material Remove the shipping brackets and packing material from inside the drive using the procedure described previously in Paragraph 2 2 3 2 4 4 Mount the RA81 on the Slides Use the following procedure to mount the drive on its slides 1 Install the left and right mounting rails onto the sides of the disk drive as shown in Figure 2 30 using ten 6 32 kep nuts RIGHT MOUNTING RAIL 6 32 X 5 16 5 PL EACH SIDE NOTES 1 REPEAT FOR LEFT MOUNTING RAIL 2 0584 Figure 2 30 Installation of Drive Mounting Rails 2 Remove the HDA to reduce the weight of the drive using the following procedure Refer to Figures 2 31 and 2 32 1 Raise the drive logic chassis Refer to Paragraph 2 2 3 Step 4 2 Unplug connector P502 from the read write module See Figure 2 31 3 Unplug connectors P602 and P603 from th
24. EK ORA81 UG 001 RA81 Disk Drive User Guide 81 001 RA8I Disk Drive User Guide Prepared by Educational Services of Digital Equipment Corporation Copyright 9 1982 by Digital Equipment Corporation All Rights Reserved The material in this manual is for informational purposes and is subject to change without notice Digital Equipment Corporation assumes no responsibility for any errors which may appear in this manual Printed in U S A This document was set on DIGITAL s computerized type setting system Class A Computing Devices Notice This equipment generates uses and may emit radio frequency energy The equipment has been type tested and found to comply with the limits for a Class A computing device pursuant to Subpart J of Part 15 of FCC Rules which are designed to provide reasonable protection against such radio frequency in terference when operated in a commercial environment Operation of this equip ment in a residential area may cause interference in which case the user at his own expense may be required to take measures to correct the interference The following are trademarks of Digital Equipment Corporation Maynard Massa chusetts DEC DECnet OMNIBUS DECUS 10 OS 8 DIGITAL DECSYSTEM 20 PDT Digital Logo DECwriter RSTS PDP DIBOL RSX UNIBUS EduSystem VMS VAX IAS VT MASSBUS 2 S S iod U 0 iD ON tA b O N QO N
25. ET EXPANSION DRIVE CABINET CABINETS EXPANSION 2 0744 Figure 2 16 Connecting the Cabinets Adjust the cabinets until their fronts are flush Remove the bottom trim panels from the front of the cabinets by removing the two screws at their base Refer to Figure 2 17 2 14 16 17 18 19 20 21 DISK DRIVE CABINET TRIM PANEL BRACKETS BOTTOM FRONT TRIM PANEL SF 2 0745 Figure 2 17 Removing the Trim Panel Brackets Remove the two screws that hold the two retainer trim brackets nearest the side where the two cabinets are joined Refer to Figure 2 18 Place the front locking bracket over the retainer trim brackets Bolt the two cabinets together with the four bolts as shown Replace the two bottom trim panels Open the back door of the cabinets Loosen the screws that hold the two back end panel locks nearest the side where the two cabinets are joined 2 15 22 23 24 25 RETAINER TRIM BRACKET FRONT LEFT END PANEL LOCK FRONT LOCKING BRACKET 2 0760 Figure 2 18 Installing the Front Locking Bracket Slide the back locking bracket over the end panel locks and tighten the four screws Refer to Figure 2 19 Replace the back door and any end panel locks removed in this procedure Lower the levelers until the cabinets are raised off their casters Adjust the levelers 2 16 app HUU Hil WH nano HHH
26. FOR SDI 0 12 24693 02 DAMFER 1 REFLACES CAS SPRINGS 2 F 70 18340 02 01 CABLE ASSEMBLY REFI ACES OLD 501 CABLE ASSY 0 17 00465 04 SDI CARLE REFLACES OLD SII CABLE 3 CHANGES TO UPFER CHASSIS 1 The DBetert Latch assembly which latches the Urrer Chassis the Lower hes been rerleced bs 3 16 1 4 turn Latch The new Latch is activated bs Placins 3 16 Hexheed tool thru the Front Eezel Cover and mskins a 1 4 clockwise turn A Lateh is located on eech side of the Front Bezel Cover This is Quality improvement 2 The Orerator Control Panel Module P N 54 14927 01 now mounts directl to the Urrer Chassis Rulkhecd The orisinal Hounting Bracket has beer removed from the Panel assemblu Older 1 Drives will the 54 14927 00 for Control Fenel failures Part number is Printed on each version of the module 3 The EMI Srring Fingers 70 20952 01 have been rerlaced bu Gasket 74 29935 02 This velisbilitw iwerovement will eliminate the broken srrins finger Problem in the field 4 The SHI Cable sssesmols hss been rerlsced and relocated to the upper left side of the rear of the Drive This includes the Cables The SDI Cable 17 00455 04 can be ordered from Stock Room 17 in loose riece 4 CHANGES TO THE LOWER CHASSIS i The Motor Brake ssesesbls has been redesigned to rivot from different location This chanse works in
27. HIELD TERMINATORS IN amp 3 t J 3 BULKHEAD ASSEMBLY MOUNTING SCREWS BULKHEAD FOR FIRST ADD ON BULKHEAD FOR SECOND ADD ON EXTERNAL SDI CABLES CZ 0764 Figure 2 20 SDI Cable Shield Terminator Installation Clamp the external SDI cables to the cable entry retainers below the I O bulkheads with either a hose clamp or tie wrap Refer to Figure 2 21 If more than one drive is mounted in the cabinet more SDI cables must be installed Refer to the 81 add on installation procedure Paragraph 2 4 for instructions 2 18 DISK DRIVE CIRCUIT BREAKER AC OUTLET FOR DRIVE POWER ON FRONT OF POWER CONTROLLER POWER LAMP POWER CONTROLLER CIRCUIT BREAKER LOCAL REMOTE SWITCH 2 0765 Figure 2 21 Single Drive External SDI Cables 2 3 3 Programming the Drive Unit Address Plug The READY cover on the operator control panel is also the drive unit address plug The drive unit numbers between 0 and 251 must be programmed into this plug The plug comes as Unit 0 To set up a drive unit number other than zero remove the READY switch cover from the control panel and cut off the tabs that add up to the required number Figure 2 22 shows the binary value represented by each tab LOCATOR PIN 16 REAR PIN CONFIGURATION 2 0747 Figure 2 22 Drive Unit Address Plug 2 19 For example if unit number 7 is required for a specific drive tabs 1 2 and 4 would have to be cu
28. NNNN BARA oo 2 4 9 CONTENTS Page INTRODUCTION PURPOSE AND SCOPE sor aeea ti eps va pd t e a 1 1 GENERAL INFORMATION 1 1 DRIVE DESCRIPTION 1 2 Head Disk Assembly v dae e e CPI i ebd a dca 1 2 Internal Drive 1 2 Multi Drive and Dual Port Capability 1 5 Recording Features iu cu psu ants ser hae meen et 1 7 Media Format a cates sind EROS uA 1 7 RELATED DOCUMENTATION 1 8 81 SPECIFICATIONS TEE E OE 1 9 RA8I OPTIONS e 1 12 INSTALLATION SITE PREPARATION AND PLANNING iab ORTE 2 1 Environmental 2 2 1 Cledu esee vua ded odes 2 1 Floor Loading eder ba d oy a Dd D 2 1 Heat Dissipation Eno 2 1 Power and Safety Precautions 2 1 AC Power WARD Bac a 8 Seip gutes t gst Andee 2 2 EQUIPMENT UNPACKING AND EXTERNAL INSPECTION 2 2 Unpacking the System a Shipping Pallet 2 2 Installing the Cabinet Levelets 2 4
29. R B 2 HEAVY LINE INDICATES DRIVE SEQUENCE CABLE CZ 0759 Figure 2 38 Cabling for Three and Four Drive System Locate the Port A SDI cable where it exits the back of the disk drive Find the end of the cable and plug the connector into Port A on the top of the I O bulkhead assembly Note the orienta tion key Screw the Port A SDI cable shield terminator into the I O bulkhead assembly Early versions of the disk drive will need separate screws to mount the shield terminator Later versions will have captive hardware Refer to Figure 2 39 Repeat Steps 1 and 2 for the Port B SDI cable Plug the SDI cable from the first disk controller into the Port A connector on the bottom of the I O bulkhead assembly Note the orientation key 2 32 INTERNAL SDI CABLES SEQUENCE BOX ASSEMBLY CABLE SHIELD TERMINATORS C BULKHEAD ASSEMBLY MOUNTING SERENO BULKHEAD FOR FIRST I O BULKHEAD ADD ON FOR SECOND ADD ON CZ 0764 Figure 2 39 Connecting SDI Cable Shield Terminators 5 Screw the shield terminator of this cable into the I O bulkhead assembly as in Step 2 6 Ifa second disk controller is used mount its SDI cable into Port B on the I O bulkhead assem bly 2 4 8 Mount the I O Bulkhead An I O bulkhead assembly must be installed on the back base of the drive cabinet for each add on drive Screw the I O bulkhead assembly on to the back of the cabinet as shown in Figure 2 40 Mount
30. ables as shown in Figure 2 44 Fasten the output of the service loop with the cable clamps installed on the vertical uprights in Step 1 above Tie wrap the cables at the bottom of the cabinet to the cable clamp at mounting hole 14 2 37 DISK DRIVES DRIVE CIRCUIT BREAKERS POWER CORDS AC OUTLETS FOR DRIVE POWER ON FRONT OF POWER CONTROLLER 98 POWER CONTROLLER LOCAL REMOTE SWITCH CIRCUIT BREAKER CZ 0766 Figure 2 44 Cable Routing and Clamping 2 5 RA81 DRIVE DIAGNOSTIC CHECKOUT The paragraphs that follow describe how to run the drive resident diagnostics using the diagnostic terminal Use this procedure to verify the proper operation of each RA81 Disk Drive after installation NOTE Checkout procedures should be used only by trained maintenance personnel 2 5 1 The Diagnostic Terminal A field service diagnostic terminal used to communicate with the RA81 is stocked with every spares kit The diagnostic terminal utilizes a standard ASCII keyboard and an RS232 interface Any EIA compatible terminal set at 300 baud can be used to communicate with the drive to run the diagnostic tests See Appen dix A for instructions on how to use this terminal 2 38 2 5 2 Applying Power to the Drive Use the following procedure to apply power to the drive 4 5 Verify that the ac circuit breakers on the power control unit and each disk drive are in the OFF position Refer to Figure 2 44 Plug the ac power co
31. ach Refer to Figure 2 24 2 Set aside the following hardware Four phillips head screws 10 32 x 5 8 inch Four lock washers 0 380 inch x 0 200 inch LD Two slide mount spacers two holes Four phillips head sems screws 10 32 x 1 2 inch Four nut bars four holes 3 Mount the chassis slides to the front vertical upright as shown in Figure 2 25 If this is a first add on drive center bay use mounting holes 27 and 31 counting from the bottom Notice that this installation to the front vertical upright needs both a slide mount spacer and a nut bar PHILLIPS HEAD SEMS SCREWS 8 32 X 5 16 CHASSIS SLIDE BRACKETS NOTE 1 REPEAT FOR LEFT CHASSIS SLIDE 2 0578 Figure 2 24 Chassis Slide Bracket Installation 2 21 VIEWED FROM FRONT OF CABINET SLIDE MOUNT NUT SPACER BAR CABINET FRONT LEFT UPRIGHT CHASSIS SLIDE BRACKET LOCK WASHERS d PHILLIPS HEAD SCREWS 10 32 X 5 8 NOTE 1 REPEAT FOR FRONT RIGHT UPRIGHT CZ 0579 Figure 2 25 Mounting Chassis Slide to Front Upright Mount the chassis slides to the back vertical uprights as shown in Figure 2 26 Note that only a nut bar is used here with sem screws Use the same mounting holes as specified in Step 3 above FROM FRONT OF CABINET VIEWED FRO PHILLIPS HEAD SEM SCREWS 10 32 X 1 2 CHASSIS VA SLIDE P NUT BRACKET 2 LEFT BACK VERTICAL UPRIGHT NOTE 1 REPEAT FOR RIGHT BACK VERTICAL UPRIGHT CZ 0749 Figur
32. ach the Microrrocessor module to the standoffs On older sodel drives the Micro s wilh the PLUNGER tere Fastener is reauired On newer drives the Micro s will have the Plunser removed end 1 4 turn Fastener is attached to the Drive Logic base Plate To solve the mismatch Problem that occurs when old style Micro is received for neu style Drive or new style Micro for older sisle 11 spare Micro s will be shirred with plastic bes containing the hardware needed to attech the Micro to the Drive For those older Drives the Flunger will need to be attached to the Micro For newer style Drives 233110181 herdwere should be needed 7 SDI CABLE MOUNTING CHANGES Due to chanse the rear of the drive the SII cables will te to the urrer left hand corner of the rear of the drive Illlistretions sf the methods to be used for routing the new stele cable have been to this document When eerfoming add on instsllation of mew style drives these ew methods should be followed Hee Hole 40 17 Mole 14 17 NO Tie Wrap Tie Wrap 6 Spacin 21 3 20 14 2X 22 24 14 Er Sequence Catle 21 20 Senuence 24 Carle 14 Tie Wrap Appro 6 Spacirin t F RAB1 ADD ON DRIVE Drive 7019692 Rev Level S RECOMMENDED CABLING IN FIRST ADD ON POSITION OF 3 amp 4 HIGH RAB1 ADD ON DRIVE Drive 7019692 Rev Level S RECOMMENDED CABLING IN SECON
33. al As the sequence is executed the following messages are displayed by the terminal ARA81 COMPLETED TEST DIAG SUBTEST RRAG1 COMPLETED TEST DIAG SUBTEST ARA81 COMPLETED TEST DIAG SUBTEST 1RA81 COMPLETED TEST DIAG SUBTEST xx RA81 gt The microprocessor LEDs increment and then settle on a hexadecimal E7 while the sequence is being executed The display of the prompt indicates successful completion of the test sequence The following terminal display means that one of the tests has failed When a test fails refer to the fault isolation procedures the RA81 Disk Drive Service Manual 1RA81 TEST DIAG SUBTEST xx ERROR xx UNITxxx ARA81 FRU xxxx xxxx xxxx After passing the above test spin up the drive by pushing the RUN STOP switch to the IN position The drive should respond with the following message FRONT PANEL FUNCTION IN PROGRESS _ diagnostic sequence is automatically executed during spin up The microprocessor LEDs remain off while the drive spins up When it is up to speed the LEDs display the E7 code and the terminal displays the following 2 41 14 15 16 17 18 19 RRAS1 COMPLETED TEST DIAG SUBTEST xx BRAS1 COMPLETED TEST DIAG SUBTEST xx 18881 0 TEST DIAG SUBTEST xx RA81 COMPLETED TEST DIAG SUBTEST 81 The terminal displays the most likely FRU to replace if an error condition is noted during the above sequence The diagnostic takes about 45
34. cape character when pushed Its purpose is the same as a VT100 escape key It is not used in RA81 diagnostic operation RA81 USER GUIDE Reader s Comments EK ORA81 UG 001 Your comments and suggestions will help us in our continuous effort to improve the quality and usefulness of our publications What is your general reaction to this manual In your judgment is it complete accurate well organized well written etc Is it easy to use ES AAA lt U U What features are most useful _ CR M M IEEE TM NEN M REC TFT What faults or errors have you found in the manual Does this manual satisfy the need you think it was intended to satisfy Does it satisfy your need Why Please send me the current copy of the Technical Documentation Catalog which contains information on the remainder of DIGITAL s technical documentation Name Street Title City Company State Country Department Zip Additional copies of this document are available from Digital Equipment Corporation 444 Whitney Street Northboro Ma 01532 Attention Communications Services 2 15 Customer Services Section Order No EK ORA81 UG 001 CX DO NOT TEAR FOLD HERE AND TAPE 2090080 BUSINESS REPLY MAIL FIRST CL
35. connected in this manner either controller can be selected to access the drive however a drive can only be on line to one controller at a time Any change controller access requires the execution of a 100 to 200 millisecond microcode switch over process in the drive and controller 3 CHANGE NOTICE Replace Figure 2 1 in RA81 User Guide EK ORA81 UG 001 with this figure DRIVE CORDS GOING TO POWER CONTROLLER PLUG CONFIGURATION DISK DRIVE 120V 60 Hz POWER CORD DEC NO A PS 1700083 23 DISK DRIVE 240 V 50 Hz POWER CORD DEC NO A PS 1700083 24 PLUGS GOING TO WALL OUTLET PLUG CONFIGURATION 120 V 60 Hz 30A 1 PHASE NEMA L5 30P DEC 12 11153 240 V 50 Hz 20A 1 PHASE USED WITH H874B POWER CNTRL L6 20 P DEC 12 11192 TO AC POWER SOURCE 240 V 50 Hz 30 1 USED WITH H874E POWER CNTRL NEMA NO L6 30 P DEC NO 12 16886 00 CX 392A Figure 2 1 RA81 Electrical Plugs and Receptacles Page 4 CHANGE NOTICE Replace section 2 2 1 in the RA81 User Guide EK ORA81 UG 001 with this new section 2 2 1 2 2 1 Unpacking the System on a Shipping Pallet When delivered the disk drive cabinet is packed in a cardboard container attached to the wooden shipping pallet shown in Figure 2 2 Use the following procedure to unpack the equipment remove it from the
36. dards 1 3 1 Head Disk Assembly The sealed HDA contains the recording media four platters rotary positioner read write heads and preamplifiers Seven of the platter surfaces are used for recording data The eighth has dedicated servo information used for positioning the read write heads The rotary positioner in the HDA is controlled by a slave microprocessor closed loop servo system The 81 uses both dedicated and embedded servo for head positioning This dual arrangement allows for coarse cylinder positioning from the dedicated servo surface and fine cylinder positioning from embedded servo bursts which are read preceding each block of data The dedicated servo surface and the embedded servo data are written on the disk at the time the HDA is manufactured 1 3 2 Internal Drive Diagnostics Two groups of internal diagnostics are used in the RA81 to permit error detection and fault isolation The first group of diagnostics is run automatically during the power up sequence to validate initial operations Error codes for this test are displayed by indicators on the operator control panel The second set of diag nostics is initiated and monitored through a diagnostic terminal as a maintenance function in the off line mode These microcode diagnostics are for field service use only and are not part of the normal operating functions dr LS i evt The 81 has a dual microprocessor master and slave control system The master 15
37. de and turns on the indicator light The write circuits of the drive are disabled in this mode Releasing the push button enables the write circuits and turns off the WRITE PROT indicator light When the disk is not read write ready it is always write protected 3 5 3 1 5 and B Port Select Switches The RAS81 Disk Drive has two port select push button switches These double action switches A and have built in lights that indicate the port through which the drive is being accessed If the drive is equipped with dual port abilities any one of three modes can be selected with the A and B switches Port A operation only B operation only Port programmable operation When the Port A button is pushed in and the Port B button is out only Port A can be accessed by the controller During the opposite condition only Port B can be accessed However when both push buttons are in at the same time either Port A or Port B can be accessed by the controller When either or both buttons are out the drive is off line to the port or ports indicated The drive will indicate that it is on line to controller A by lighting the A switch on line to controller B by lighting the B switch or not on line to either controller by leaving both lights off During normal operation the indicator lights will never be on at the same time The on off conditions of the port indicator lights do not always follow changes in switch positions imme
38. diately For example if the drive is on line to controller A the indicator light for A will be on If the switches are then reset for access by controller B the A indicator will stay on until the drive is actually on line to controller B Then and only then will the indicator lights change state 3 2 CIRCUIT BREAKERS Each disk drive has a circuit breaker on the back panel as well as a breaker on the back of the power controller in the bottom of the cabinet Access to these breakers is through the back door of the cabinet The breakers on the drive control the application of ac power to the drive dc power supply the cooling fans and the spindle motor This breaker must be on before the drive will operate The power controller breaker regulates the application of ac power to all assemblies within the RA81 cabi net and must be turned on before the drive breaker can be effective 3 3 DRIVE OPERATION 3 3 1 Spin Up Push in the RUN STOP button on the drive front panel to spin up the drive The RUN indicator will light immediately and the READY indicator will come on as soon as the drive has completed the spin up cycle 3 3 2 Spin Down Release the RUN STOP button out position on the drive front panel to stop the drive The READY indicator will go off immediately and the RUN indicator will go off as soon as disk rotation stops 3 3 3 Removing RA81 Power Do a spin down as described above After the RUN indicator has gone off turn the drive brea
39. displayed A 3 CONTROL CHARACTERS A control character e g is obtained by using the CTRL key the shift keys and the appropriate letter key Push the CTRL key Push one of the shift keys simultaneous with the appropriate letter key Example 17 is desired The following steps should be used 1 Push CTRL key 2 Push the upper shift key on the right hand side of the drive 3 Simultaneous with step 2 push the number 0 key A 4 CONTINUE CONT AND CLEAR CLR KEYS The X On X Off feature is enabled when power is applied to the terminal The CONT key disables the automatic X On X Off feature while the CLR key re enables the feature Keeping this feature in auto matic allows the display buffer to fill and then to automatically transmit a signal X Off to the microproc essor This signal stops all transmission of data to the display buffer until the buffer is unloaded At this time the terminal automatically sends an X On signal to re enable transmission A 5 X OFF KEYS These keys manually control the display buffer of the terminal If the display buffer is full an automatic X Off signal has stopped all transmission to the buffer The X On key is used to reload the buffer with new information even though the buffer has not been read The X Off key may be used to stop the loading of the buffer even though the buffer is not full For exam ple the automatic X On X Off feature is disabled by the CONT key and the diagno
40. e 2 26 Mounting Chassis Slide to Back Upright 2 22 Mount the electrostatic discharge bracket over the chassis slide bracket on the back left vertical upright Pass the two sem screws through the two center holes of the chassis slide bracket and fasten them to the nut bar inside Refer to Figure 2 27 If this is the first add on drive center bay use mounting holes 28 and 30 If this is the second add on drive bottom bay use mount ing holes 10 and 12 VIEWED FROM BACK OF CABINET LEFT VERTICAL UPRIGHT VIEWED FROM BACK LEFT CHASSIS SLIDE BRACKET ELECTROSTATIC DISCHARGE BRACKET A PHILLIPS HEAD SEM SCREWS 10 32 X 1 2 CZ 0750 Figure 2 27 Mounting the Electrostatic Discharge Bracket Insert the two cable retainer springs in to the back of the left and right chassis slides as shown in Figure 2 28 Push the cable retainer springs until they latch into place Mount an 11 16 inch cable clamp on to each cable retainer spring as shown Each cable clamp should be mounted on inside drive side of the cable retainer spring Install the drive detent latch on the left vertical upright back view See Figure 2 29 Ensure that the drive detent latch will not move freely but is loose enough that it can be adjusted later If this is a first add on drive center bay use mounting holes 36 and 37 If this is a second add on drive bottom bay use mounting holes 18 and 19 2 23 VIEWED FROM FRONT OF CABINET PHILLIPS H
41. e preamplifier module Refer to Figure 2 31 4 Place the belt tension lever in the release position Refer to Figure 2 31 2 25 READ WRITE MODULE BELT TENSION LEVER RELEASED POSITION ENGAGED POSITION HDA POSITIONER LOCKING ARM HDA HOLDDOWN NUTS 4 CZ 0770 Figure 2 31 Removal of HDA Cable Connections 5 Remove the four HDA retaining nuts 6 Place the positioner lock in the LOCK position Refer to Figure 2 32 CAUTION The could be damaged if the previous step is not performed 7 Remove the HDA from the drive by lifting from diagonally opposite corners Refer to Figure 2 32 8 Place the HDA on a level surface in the vertical position only Feet are provided on the front cover of the HDA for this purpose 2 26 CAUTION Do not place the HDA in a horizontal position on the pulley The speed and temperature transducers mounted on the bottom of the HDA could be dam aged If the is going to be moved to another location tape the HDA spindle pulley in place to prevent movement of the spindle Any movement of the spin dle could damage the heads It is important to use a good nylon reinforced pack ing tape Masking tape should never be used as it is not strong enough HAND POSITIONS POSITIONER LOCK IN LOCK POSITION PLASTIC BULKHEAD FEET 2 8021 Figure 2 32 HDA Positioner Lock Extend the cabinet stabilizer as shown in Figure 2 33 Extend each chass
42. ead positioning This dual arrangement allows for coarse cylinder positioning from the dedicated servo surface and fine cylinder positioning from embedded servo bursts which are read preceding each block of data The dedicated servo surface and the embedded servo data are written on the disk at the time the HDA is manufactured 1 3 2 Internal Drive Diagnostics Two groups of internal diagnostics are used in the 81 to permit error detection and fault isolation The first group of diagnostics is run automatically during the power up sequence to validate initial operations Error codes for this test are displayed by indicators on the operator control panel The second set of diag nostics is initiated and monitored through a diagnostic terminal as a maintenance function in the off line mode These microcode diagnostics are for field service use only and are not part or the normal operating functions The 81 has a dual microprocessor master and slave control system The master is located on the mi croprocessor module and the slave is located on the servo module One microprocessor handles real time functions such as servo control while the other controls status checking Both microprocessors share the diagnostic responsibilities SS X SES SN 2 0775 The RA81 Disk Drive 1 1 igure F CPU SDI CONTROLLER SDI CABLES Figure 1 2 Basic 81 Disk Subsystem Block Diagra
43. ent 2 2 3 Removing Internal Shipping Brackets and Packing Material Packing material and shipping brackets are inside the cabinet of each disk drive Use the following proce dure to remove this material and to prepare the drive for operation Raise the logic access cover by turning the lock 90 degrees counterclockwise Refer to Figure 2 7 2 Fold out the servo and personality modules Remove the foam shipping pads between the mod ules Figure 2 8 3 Return the modules to their original position and lock the logic access cover back in place 4 Raise the drive logic chassis assembly by pushing in on the latch behind the center slot in the front bezel Figure 2 7 Use a screwdriver blade to trip the latch 2 6 LOGIC ACCESS COVER LOGIC ACCESS COVER LOCK FRONT BEZEL LOGIC CHASSIS RELEASE LATCH CZ 0739 Figure 2 7 Raising the Drive Logic Chassis Assembly LOGIC ACCESS COVER SERVO MODULE PERSONALITY MODULE FOAM PADS 00 0000 00000170001 UO DU D UD CZ 0738 Figure 2 8 Foam Pad Removal 2 7 Remove the four red shipping brackets that fasten HDA to its mountings See Figure 2 9 The bracket next to the spindle motor requires special attention and should be removed last To remove the other three shipping brackets loosen the three HDA mounting nuts Also com pletely remove the 5 16 inch hex head bolts that hold the shipping brackets in place Slide the three shipping brackets out f
44. et is used Refer to Figures 2 38 and 2 41 2 35 2 4 10 Connect AC Power Plug the ac power cord from each add on into the ac receptical on the power controller at the base of the cabinet Refer to Figure 2 42 CABLE MOUNTS CZ 0757 Figure 2 42 Power Controller AC Receptacles 2 4 11 Route and Clamp the Cables The cables from the add on drives must now be routed and clamped to allow the drive to be extended on the slide rails Route and clamp the cables as follows 1 Mount the spacers and cable clamps into the back vertical uprights as shown in Figure 2 43 If this is the first add on drive center bay mount the cable clamps in hole 44 of the left and right vertical uprights If this is the second add on drive bottom bay mount the cable clamps in mounting hole 23 of the left and right vertical uprights 2 36 NUT 10 32 3 8 STANDOFF W 10 32 6 32 CABLE CLAMP 3 8 PHILLIPS HEAD SCREW 6 32 X 5 16 FLAT WASHER 0 375 OD X 0 156 ID Figure 2 43 Connecting Cable Clamps to Uprights AN 2 0771 Use the 15 cable ties provided with each add on to route and tie the cables where indicated in Figure 2 44 Three cable ties are used on the ac power cord and seven ties are used on the SDI and drive sequence cables Tie wrap the cables to the clamp mounted previously on the back of the chassis slides Form a service loop approximately eight inches in diameter in the c
45. f drives adding the heat dissipation figures of the other system components and then adjusting the total figure to allow for cooling system efficiency and any other factors 2 1 5 Power and Safety Precautions WARNING Hazardous voltages are present inside this equip ment Installation and servicing should be performed by a qualified and trained service person Bodily in jury or equipment damage may result from incorrect servicing Refer to the RA81 Service Manual for proper instructions The 81 will not cause any unusual fire or safety hazards to other computer equipment The ac power wiring in the computer system should be carefully checked however to be sure there is adequate capacity for future expansion The circuit breaker on the back of the power controller regulates the power to every drive within the cabinet 2 1 6 Power Wiring The wiring used by Digital Equipment Corporation conforms to UL and other standards listed in Para graph 1 3 This means the wire used as equipment ground is green and yellow The ground wire carries no load current except in an emergency but does carry leakage current All equipment is shipped with a grounding connection on its frame The ac return line also called the identified conductor neutral com mon and cold lead is blue The ac return line must not be used to ground equipment since its purpose is to conduct current The ac input line brown wire is also called the hot wire Its p
46. gements The switch cover has a unique cam coded configuration that corresponds to the drive unit number Refer to Paragraph 2 3 3 for details on how to program the logic plug The cam coded switch sets up a unit code corresponding to the drive number when plugged into the mating cam encoded switch located behind the READY indicator light Refer to Figure 3 2 Drive selec tion is accomplished when the address on the drive select lines matches the code established by the switch cover SWITCH COVER READY INDICATOR LAMP AND MICROSWITCH CONTACTS XE CZ 0756 Figure 3 2 Cam Coded Switch Cover 3 1 4 WRITE PROT The WRITE PROT switch is a double action push button with a built in indicator light Pushing in on this switch places the drive in the write protect mode and turns on the indicator light The write circuits of the drive are disabled in this mode Releasing the push button enables the write circuits and turns off the WRITE PROT indicator light When the disk is not read write ready it is always write protected 3 5 3 1 5 A and B Port Select Switches The 81 Disk Drive has two port select push button switches These double action switches A and B have built in lights that indicate the port through which the drive is being accessed If the drive is equipped with dual port abilities any one of three modes can be selected with the A and B switches Port A operation only B operation only Port
47. ir with further informetion and illustrations will be published in Sreed Bulletin and the CXO Risiit Stuff document 2 SPARES When incorroretes the mechanical changes to the Irives spares will be asavailacle for the Field Stock Room 17 THE FART FRINTED ON EACH OF THESE FARTS SHOULR RE USED WHER FLACIHC ORIERS FOR REPLACEMENTS The followins list of parts will be included in the new design CARLE SPRING ASSEMBLY REPLACES ACTUATOR WING PIVOT 60 HZ MTR BRAKE ASS Y REPLACES OLD MOTOR BRAKE ASS Y 50 HZ MTR ASS Yi REPLACES OLD KOTOR BRAKE ASS Y 60 HZ BELT REPLACES 010 40 HZ RELT 90 HZ BELT REFLACES 01 50 HZ FELT A C FAN HARNESS REPLACES 01 0 FAN HARNESS TENS SW HARNESS REFLACES OLI RELT TENS SW HAF PRE AMP CABLE 557 REPLACES OLD P A CABLE ASS Y SEQUENCE CEL AS Y REPLACES QLI SEQUENCE CARLE MICRO SWITCH REPLACES 01 0 MICKO SWITCH EHI GASKET FOR REAR OF DRIVE EMI GASKET 2 REFLACES EMI STRIPS 2 OFERATOR CONTROL FNL REPLACES OF CTL FNL 557 70 21592 01 e B 70 21173 01 C 70 21173 02 D 12 12635 06 E 12 12635 07 F 70 16733 01 70 21452 01 70 21469 01 I 70 21590 01 Je 12 22845 01 74 29936 02 L 74 299 36 03 M 54 14927 01 99 99 C8 99 we we 9 we We ws ve 74 29005 01 I 0 PLATE REPLACES REAR RULKHE
48. is slide all the way forward until it locks See Figure 2 34 WARNING second person is needed to place the drive on the chassis slides because of the weight of the disk drive 2 27 STABILIZER 2 0753 Figure 2 33 Extending Cabinet Stabilizer DRIVE CABINET LOCK LOCK ARM ARM A ASSEMBLY PHILLIPS HEAD SEM SCREWS 8 32 X 5 16 2 EACH SIDE CZ 0754 Figure 2 34 Extending the Chassis Slides With the help of a second person lift the drive and place it on top of the chassis slides as shown in Figure 2 34 Push the drive toward the back of the cabinet until its mounting rails touch the stop 2 28 Fasten the drive to the chassis slides using four 8 32 x 5 16 inch phillips head sem screws as shown Extend the drive forward on the slides Replace the HDA using the following procedure 1 Ensure that the drive belt is centered on the motor pulley The other end of the belt should be even with the top of the nylon rollers on the wing pivot assembly See Figure 2 35 CENTER BELT ON MOTOR PULLEY DRIVE BELT PIVOT ASSEMBLY ALIGN BELT WITH TOP OF ROLLERS 2 0767 Figure 2 35 Wing Pivot Assembly CAUTION Damage to the HDA drive belt or nylon rollers could result if the drive belt is not aligned correctly 2 Lift the HDA by grasping two SAP opposite corners then lower the HDA over the four mounting bolts 3 Replace the four nuts and washers on the HDA 4 Connect P6
49. ker on the back panel off and disconnect the cord going to the power controller This will remove all power to the drive 3 4 CUSTOMER CARE The air filter in the logic chassis assembly should be inspected and cleaned every six months 3 4 1 Air Filter Removal To remove the air filter proceed as follows 3 6 1 Pull down the access door on the front bezel of the drive Refer to Figure 3 3 NOTE The hinge mechanism can be damaged if tools are placed on the open access door or if it is leaned on 2 Take hold of the filter material and pull outward until it is free of the bezel 3 4 2 Cleaning 1l Wash the foam air filter in warm water using a mild detergent 2 Rinse the filter material with clear water and then allow to dry 3 4 3 Replacement 1 Slide the filter into place inside the bezel 2 Close the access door NOTE Replace the filter by ordering DIGITAL part no 7422816 00 OPERATOR CONTROL PANEL AIR FILTER CZ 0599 Figure 3 3 Air Filter Removal 3 7 3 1 3 UNIT READY The READY indicator is preceded by a successful fault free spin up sequence and indicates that the drive is in a read write ready condition The READY indicator will only come on when the RUN STOP switch is in the RUN position and the RUN light is on The READY indicator goes off during seek operations The numbered switch cover over the READY indicator light is also a logic plug which distinguishes one drive from another in multi drive arran
50. ll tests on each drive disconnect the diagnostic terminal fold the servo and personality modules back into their proper positions and then close and secure the logic access cover on the drive 2 42 3 1 3 UNIT READY The READY indicator is preceded by a successful fault free spin up sequence and indicates that the drive is in a read write ready condition The READY indicator will only come on when the RUN STOP switch is in the RUN position and the RUN light is on The READY indicator goes off during seek operations The numbered switch cover over the READY indicator light is also a logic plug which distinguishes one drive from another in multi drive arrangements The switch cover has a unique cam coded configuration that corresponds to the drive unit number Refer to Paragraph 2 3 3 for details on how to program the logic plug The cam coded switch sets up a unit code corresponding to the drive number when plugged into the mating cam encoded switch located behind the READY indicator light Refer to Figure 3 2 Drive selec tion is accomplished when the address on the drive select lines matches the code established by the switch cover SWITCH COVER READY INDICATOR LAMP AND MICROSWITCH CONTACTS CZ 0756 Figure 3 2 Cam Coded Switch Cover 3 1 4 WRITE PROT The WRITE PROT switch is a double action push button with a built in indicator light Pushing in on this switch places the drive in the write protect mo
51. m 1 4 ADDITIONAL DRIVES CZ 0730 1 4 PURPOSE AND SCOPE CHAPTER 1 INTRODUCTION This manual describes the RA81 Disk Drive and tells how to install checkout and operate the equipment This manual is written primarily for the 81 user except for Chapter 2 which is only for qualified field service personnel 1 2 GENERAL INFORMATION The 81 is a random access moving head disk drive with non removable media using a head disk as sembly HDA The HDA a key feature of this drive protects data and improves hardware dependability The 81 has a data storage capacity of 456 megabytes 16 bit word format The RA81 connects to the controller via the Standard Disk Interconnect SDI bus and may be used with any controller implementing this bus Additional disk drives can be connected to a controller to increase the data storage capacity The RASI can also be connected in a dual port arrangement permitting time shared access by two controllers Performance Features e 17 4 megabit per second peak transfer rate e 28 ms average positioning rate e 8 3 ms average rotational latency Data Integrity Protected media e Microprocessor controlled servo Automatic error correction Hardware Features e Simple modular construction e Rugged design e Extensive microcode diagnostics Like other fixed media devices some method of backup should be used to prevent loss of data in the event of a failure The follo
52. nse the filter material with clear water and then allow to dry 3 4 3 Replacement 1 Slide the filter into place inside the bezel 2 Close the access door NOTE Replace the filter by ordering DIGITAL part no 7422816 00 OPERATOR CONTROL PANEL AIR FILTER 2 0599 Figure 3 3 Air Filter Removal 3 7 APPENDIX DIAGNOSTIC TERMINAL INSTRUCTIONS This appendix provides instructions on how to use the field service diagnostic terminal A 1 INTRODUCTION Refer to Figure A 1 The terminal contains a two level LED display and a keyboard The display holds a maximum of 32 characters at a time while an internal buffer stores 2K characters for the display The keyboard contains a standard ASCII set of alphanumeric characters The larger character on each keybut ton 15 the default character displayed when the button is pushed DISPLAY SCROLL SWITCH EQUIPME CORPORATION SHIFT KEYS 2 0768 Figure 1 Field Service Diagnostic Terminal A 2 SHIFT KEYS To obtain one of the other three possible characters shown on any keybutton one of the three shift keys on the right side of the terminal must be used When the upper shift key on the terminal is pushed simulta neous with a keyboard button the left most character is dislayed As an example push the middle shift key and the number 5 key The letter K is displayed Pushing the lower shift key and the 0 key results in the letter being
53. rd from the drive into the ac power receptacle on the power control unit at the bottom of the cabinet if this is an add on drive The LOCAL REMOTE switch on the power controller must be in the LOCAL position to en sure drive operation since no power sequencing cable is used Plug the control unit ac power cord into an external ac power source Place the ac circuit breaker on the power control unit in the ON position 2 5 3 Checkout Use the following procedure to verify drive operation Ensure the drive is in the off line state by placing both port select switches A and B in the OUT position Place the RUN STOP switch in the OUT position Open the logic access cover and raise the servo and personality modules Make sure that all cable connectors are firmly seated in the mating connectors Place the ac circuit breaker on the back of the drive in the ON position Internal drive diagnos tics hardcore test sequence run automatically when the drive circuit breaker is turned on front panel lights turn on while the drive runs these diagnostics If the drive successfully passes the hardcore test sequence the front panel indicators go off in 3 4 seconds If an error code is displayed on the front panel indicators refer to the fault isolation procedures in the RA81 Ser vice Manual NOTE Do not have the diagnostic terminal connected to the drive at this time Doing so could cause the hardcore tests to fail The drive idle loop tests
54. rms at 240 volts 4200 watts at 120 volts 1 11 Table 1 2 RASI Specifications Cont Characteristic Running power for 120 volt ac drives Starting power for 220 240 volt ac drives Running power for 220 240 volt ac drives Power factor Line cord length from cabinet Plug type 120 volts 60 Hz 240 volts 50Hz Specification 644 watts at 120 volts 4320 watts at 240 volts 496 watts at 240 volts 0 9 259 cm 8 5 feet Hubbel No 2611 NEMA No L5 30P DEC No 12 11193 See Figure 2 1 Hubbel No 2321 NEMA No L6 20P DEC No 12 11192 See Figure 2 1 1 6 RA81 OPTIONS Table 1 3 lists the RA81 options All RA81 options in Table 1 3 include a 12 foot shielded inter cabinet cable If a longer cable is required because of the dual access feature order cable BCO6V 12 12 feet 06 25 25 feet BCO6V 50 50 feet or BCO6V 80 80 feet Table 1 3 81 Options Option 81 RA81 AD 81 RA81 CD RA81 EA RA81 ED RUA81 AA RUASI AD RUASI CA RUASI CD RUASI EA RUA81 ED RUA81 JA RUASI JD Description 456 MB drive 120 VAC 60 Hz no cabinet 456 MB drive 240 VAC 50 Hz no cabinet RAS81 AA H9642 AP cabinet 60 Hz RASI AD H9642 AR cabinet 50 Hz 3 RA81 AA H9642 AP cabinet 60 Hz 3 RA81 AD H9642 AR cabinet 50 Hz 81 UDASO no cabinet RA81 AD UDASO no cabinet RASI CA UDA50 cabinet RASI CD UDASO cabinet RASI EA UDASO cabinet RA81 ED UDASO
55. rom under the HDA mounting nuts Remove the shipping bracket next to the spindle motor by loosening the remaining HDA mount ing nut and detaching the bolt and jam nuts See Figure 2 9 Slide the shipping bracket out from under the HDA mounting nut TOP VIEW SPINDLE MOTOR SHIPPING BRACKETS SHIPPING BOLT AND JAM NUTS SHIPPING SHIPPING BRACKET HDA MOUNTING 5 16 HEX HEAD NUT BOLT POSITIONER tock LEVER HDA MOUNTING NUT LOCK WASHER HDA MOUNTING FLANGE FLAT WASHER SHOCK MOUNT SHIPPING BRACKET FRONT VIEW CZ 0741 Figure 2 9 HDA Details 2 8 Save all shipping brackets and hardware for future use when moving equipment 7 Tighten all four HDA mounting nuts 8 Ensure that the belt tension lever is in the engaged position as shown in Figure 2 10 9 Place the positioner lock lever on the HDA in the UNLOCK position Figure 2 9 MOTOR BRAKE ASSEMBLY READ WRITE MODULE BELT TENSION HDA LEVER RELEASED POSITION BEN ENGAGED POSITION POSITIONER LOCKING ARM 2 0742 Figure 2 10 Belt Tension Lever NOTE An interlock switch prevents the spindle motor from operating while the belt tension is released See Fi gure 2 11 The belt tension lever must be in the en gaged position for spin up 2 9 BELT TENSION LEVER ENGAGED POSITION INTERLOCK SWITCH SS CZ 0743 Figure 2 11 Belt Tension Lever and Interlock Switch 10
56. seconds to complete Do not proceed to the next step until the prompt is displayed Type RUN DIAG to initiate the entire drive sequence test with the drive spun up The terminal should display messages similar to those when the drive was spun down If an error is indicated during this test the terminal will display the most likely FRU to replace The microprocessor LEDs increment and then settle on a hexadecimal E7 while the sequence is being executed about 7 minutes When the RA81 gt prompt is displayed respond by typing in SET DIAG LOOP HALT to place the drive in a continuous loop mode halting only on an error As soon as the drive returns with the RA81 gt prompt respond by typing RUN DIAG entire drive sequence diagnostics are once again initiated Run this test sequence for 25 minutes If any errors occur during this time the terminal will indicate the most likely failing FRU Refer to the RA81 Service Manual for the list of FR Us After the above test has run for 25 minutes without an error key CTRL C to terminate the loop mode and the test As soon as the drive returns an RA81 gt prompt type EXIT to exit the diagnostic monitor mode NOTE CTRL 7 17 can also be used to exit the monitor mode One or both of the port select switches can be pushed in to accomplish the same Push in the desired port select button to place the drive in an available state Run the main system diagnostics Upon completion of a
57. sembly HDA The HDA a key feature of this drive protects data and improves hardware dependability The 81 has a data storage capacity of 456 megabytes 16 bit word format The RA81 connects to the controller via the Standard Disk Interconnect SDI bus and may be used with any controller implementing this bus Additional disk drives can be connected to a controller to increase the data storage capacity The RASI can also be connected in a dual port arrangement permitting time shared access by two controllers Performance Features e 17 4 megabit per second peak transfer rate e 28 ms average positioning rate e 8 3 ms average rotational latency Data Integrity Protected media e Microprocessor controlled servo Automatic error correction Hardware Features e Simple modular construction e Rugged design e Extensive microcode diagnostics Like other fixed media devices some method of backup should be used to prevent loss of data in the event of a failure The following methods are recom mended File Duplication Important files should be dupli cated often Usually this will involve copying the data on a removable medium such as magnetic tape Journaling The use of journaling is recommended in transaction processing applications This method al lows reconstruction of files up to the last checkpoint or backup 1 3 DRIVE DESCRIPTION The 81 is a self contained disk drive with a built in cooling system
58. stics are inputting test messages to the terminal These messages are being sent at a faster rate than can be read by the human eye Pushing the X Off key stops the diagnostic testing and the messages This enables the user to read the display and manually scroll through the buffer A 6 DELETE KEY The delete key is used to correct mistakes in keyboard entries Once a mistake is discovered the delete may be pushed causing a backslash X to be displayed with the last character input The new character may now be keyed in For example if RUN DIAF was keyed in the delete key could be used as follows RUN DIAF F G The command RUN DIAG is now input correctly DISPLAY SCROLL SWITCH The display scroll switch is located on the left side of the terminal Its function is to back up or advance the display within the 2K display buffer Long messages cannot be read all at once on a 32 character display The display scroll switch is moved in the upward direction to scroll the display forward through the buffer The display scroll switch is moved downward to scroll the display backward through the buffer A 2 A 8 BREAK KEY The break key transmits a break character when pushed Its purpose is the same as a 100 break key It is not used in 81 diagnostic operation 9 CR KEY CARRIAGE RETURN This key is pushed after typing a command string Its effect is that of an enter key on a computer A 10 ESCAPE KEY This key transmits an es
59. t Page 6 7 CHANGE NOTICE Replace Figure 2 3 in RA81 User Guide EK ORA81 UG 001 with this figure UNLOADING RAMP TWO PROVIDED SHIPPING PALLET STRIPS SECOND RAMP BOARD ATTACHES HERE CX 394A Figure 2 3 Ramp Installation on Shipping Pallet Page 8 CHANGE NOTICE Replace Figure 2 4 RA81 User Guide EK ORA81 UG 001 with this figure LEVELER CX 395A Figure 2 4 Cabinet Leveler Feet Adjustment From DONNER 20 1986 08 40 SALAZ SubJi FYI From 8672 KEITH BROWN CX CSSE 10 1986 15 22 COMET MURRAYB Subj updseted users suide duc 1 USER S HATE 17 M6 F 19786 SURJECT 81 HARDWARE REVISION EIGHT On Arril 1 1986 CXO will begin rroducins RABO and drives with the Lower Chassis confisuretion of future Products Changes to the Front Bezel Cover Detent Latch Orerator Control Fanel being introduced These enhancements ere being made 25 Quality and Reli ability improvements to the RA series of Products following list of itesas will be effected 1 DOCUMENTATION The RA81 Service Manual end User s Guide will take arrroximeately months to formally urdste The messatie that vou ere reeding will be Blitzed to all Branches and cors of this will be included in the RAB1 User s Guide shipred with each RABI until documontstion is available Tech T
60. t off the switch cap If unit number 113 is required tabs 64 32 16 and 1 must be removed Leave all tabs on if unit number 0 is required After the drive unit number has been selected place the gummed label with the corresponding number in the recessed area on the front of the switch cover Replace the switch cover on the operator control panel 2 4 81 ADD ON INSTALLATION Use the following procedure to install additional drives in a cabinet CAUTION Do not try to complete the add on installation with out the help of a second person because of the weight of the drives 2 4 1 Remove the Front Trim Panel The first add on drive should be placed in the center bay of the 81 cabinet and the second in the bottom bay Remove the trim panel at the proper location by unscrewing the four 10 32 hex nuts that hold the panel to the cabinet frame These nuts can be reached through the back of the cabinet Refer to Figure 2 23 HEX NUT 10 32 4 PL 000000000004 2 0577 Figure 2 23 Removing Cabinet Trim Panel 2 20 2 4 2 Install the Slide Assembly Each RA81 add on drive must be mounted in the cabinet on a slide assembly Use the following procedure to install the slides in the drive cabinet 1 Screw chassis slide bracket on to each end of the left and right chassis slides Use two 8 32 x 5 16 inch phillips head sems screws screws with star washers attached to mount e
61. t to the power supply and push on the drive detent latch Remember to reconnect the electrostatic discharge bracket each time the drive is pushed back into the cabinet 2 30 2 4 7 Install the Internal SDI Cables The two internal SDI cables that exit from the back of the add on drive must be connected to the top of the I O bulkhead assembly The external SDI cable that connects the drive cabinet to the disk controller must be mounted on the bottom of the I O bulkhead assembly If two disk controllers are used dual port opera tion a second external SDI cable must be installed The SDI cables must be connected to the I O bulk head before the bulkhead is connected to the drive cabinet Figures 2 37 and 2 38 show the electrical wiring for add on disk drives Use the following procedure to install the SDI cables LINES DRIVE 1 POWER CONTROLLER 4 J6 J4 1 22 SDI CABLES DRIVE BULKHEAD 4 SEQUENCE TERMINATOR SDI CONTROLLER A PORT O SDI CONTROLLER B PORT 1 PORT O PORT 1 NOTES 1 HEAVY LINE INDICATES THE DRIVE SEQUENCE CABLE CZ 0758 Figure 2 37 Cabling for a Two Drive System 2 31 LINE POWER hA Du J6 J5 J4 03 POWER CONTROLLER SDI CABLES SDI CABLES 1 0 BULKHEAD 0 0 1 0 B A OUT IN BULKHEAD B ALB ALE AJOUT TERMINATOR NOTES 1 ALL PORT A CONNECTIONS GO TO SDI EXTERNAL DRIVE CONTROLLER A ALL PORT B CONNECTIONS SEQUENCE CABLE GO TO SDI CONTROLLE
62. the I O bulkhead assembly in the drive 1 location for the first add on drive Mount the I O bulkhead assembly in the drive 2 location for the second add on drive 2 4 9 Install the Drive Sequence Cables Figures 2 37 and 2 38 show the electrical wiring diagrams for add on drives Use them as a reference when installing drive sequence cables as follows l Unplug the drive sequence cable from the output connector on drive 0 top drive done by rais ing the back cover and removing it from the cable clamp Refer to Figure 2 41 2 the drive sequence cable described in Step 1 into the output connector on drive 1 for one add on or into the output connector on drive 2 for two add ons 3 Install the new 8 foot cable between the output connector of drive 0 and the input connector on drive 1 If a second add on drive has been installed connect another 8 foot drive sequence cable between the output connector of drive 1 and the input connector of drive 2 2 33 DRIVE SEQUENCE CABLE BULKHEAD il U E I O BULKHEAD RE FOR FIRST VN ADD ON BULKHEAD FOR SECOND ADD ON CZ 0772 Figure 2 40 Mounting the I O Bulkhead Assembly DRIVE SEQUENCE CABLES SEQUENCE BOX ASSEMBLY DRIVE SEQUENCE CABLES 2 0769 Figure 2 41 Drive Sequence Cable Installation Tie wrap the drive sequence cable to the existing SDI cable clamps Add a cable between the drive sequence bulkheads on each drive cabinet when a second cabin
63. urpose is to supply current to the system The ac plugs and receptacles used the RA81 are shown in Figure 2 1 PLUG RECEPTACLE 120V 60 Hz 30A 1 PHASE HUBBEL 2610 2611 L5 30R NEMA L5 30P 12 11194 DEC 12 11193 240 V 50Hz 15A 1 PHASE HUBBEL y 42321 42320 NEMA f L6 20P L6 20R DEC 4 12 11192 12 11191 NOTE PIN CONFIGURATIONS OF PLUGS EXITING POWER CONTROLLER IN CABINET 2 578 Figure 2 1 RASI Electrical Plugs and Receptacles 2 2 EQUIPMENT UNPACKING AND EXTERNAL INSPECTION When delivered the RA81 equipment is packed in a cardboard container attached to a shipping skid or pallet Refer to Figure 2 2 Before unpacking the equipment check for external shipping damage Report any damage to the DIGI TAL Field Service or Sales Office and to the local carrier Keep all packing material and receipts when a damage claim is filed 2 2 1 Unpacking the System on a Shipping Pallet To unpack the equipment and remove it from the pallet proceed as follows using Figure 2 2 as a guide 1 Remove all packing materials 2 Remove the four shipping bolts that fasten the drive cabinet to the pallet Refer to the inset in Figure 2 2 2 2 LAG SCREW AND NAILS STAPLED TO RAMP SHIPPING STRAPS PAINTED BRACKET Figure 2 2 Unpacking a System on a Shipping Pallet 3 Build the ramp Figure 2 3 to aid in rolling the disk drive off the pallet 1 Remove the plastic package containing the lag screw and
64. wing methods are recom mended File Duplication Important files should be dupli cated often Usually this will involve copying the data on a removable medium such as magnetic tape Journaling The use of journaling is recommended in transaction processing applications This method al lows reconstruction of files up to the last checkpoint or backup 1 3 DRIVE DESCRIPTION The 81 is a self contained disk drive with a built in cooling system and dc power supply See Figure 1 1 The drive has optional slide rails and is designed to be inserted into a 19 inch wide RETMA equipment rack Up to three drives one fixed mounted and two mounted on slides can be included in a single cabinet An RAS1 Disk Drive subsystem is made up of SDI controller two controllers with the dual port con figuration and one or more disk drives Figure 1 2 shows the relationship between the subsystem compo nents All RA81 disk logic is included within the drive Three of the primary circuit modules servo microproces sor and personality are located directly under the logic access cover on top of the cabinet These three modules are mounted on hinges for ease of service See Figure 1 3 DC operating power for the logic circuits is provided by the drive power supply located inside the back of the drive Internal fans provide the necessary cooling for the power supply and for other drive components The RAS81 Disk Drive conforms to UL CSA FCC and VDE stan
65. wn on the top door latch See Figure 2 14 PULL DOWN ON DOOR LATCH END PANEL BACK DOOR END PANEL LOCK GROUND WIRE 2 0761 Figure 2 14 Back Door End Panel Lock Removal Lift the door off the bottom end panel lock Loosen the two hex screws and remove the end panel lock from the base of the cabinet Lift the end panel vertically to disengage it from the four key buttons on the side of the cabinet frame Refer to Figure 2 15 Unscrew the ground wire attached to the end panel Remove the back end panel lock from the expansion cabinet Attach the ground wire just removed from the first cabinet to the exposed side frame of the expansion cabinet Attach the other end of the ground wire to the end panel just removed from the first cabinet 2 12 10 11 12 13 TOP KEY BUTTONS GROUND WIRE BOTTOM KEY BUTTONS END PANEL INSIDE VIEW REMOVE CENTER SCREW CZ 0774 Figure 2 15 End Panel Bottom Key Button Removal Lower the end panel over the keyhole buttons on the expansion cabinet Secure the end panel by replacing the back end panel lock Remove the screws in the center of the two lower key buttons from the first drive cabinet Engage the top two key buttons on the first drive cabinet Figure 2 16 into the keyhole slots on the expansion cabinet joiner panel 2 13 14 15 TOP VIEWS JOINER PANEL DRIVE CABINETS CABINET EXPANSION KEY BUTTONS DRIVE CABINETS CABIN

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