Plextor PlexWriter 4/12 Burner
Contents
1. DRIVE DRIVE ONLY w 16 bit SCSI Interface CD ROM drive dm 0 ED Side rails with 4 chrome and 4 black screws Caddy Plextor Device Driver floppy disk 16 bit SCSI interface board amp installation guide X Audio cable X 2 2 SCSI cable Plextor operation manual Warranty registration card Extra jumpers for setting drive switches Quick installation guide Windows 95 installation manual PX 43CE PX 45CE OPERATION MANUAL 3 CHAPTER 2 Box Contents PX 45CE External Drives DRIVE DRIVE DRIVE ONLY w 16 bit w SCSI Mac Kit Interface CD ROM drive X X X Caddy Plextor Device Driver floppy disk 16 bit SCSI interface board amp installation guide Audio Cable X X SCSI Cable Plextor operation manual X W arranty registration card X M ac device drivers manual amp disk X Quick installation guide X Windows 95 installation manual 5 OPERATION MANUAL CHAPTER 2 Box Contents A Gentle Reminder YOUR TASK Save your box if you received one YOUR OBJECTIVE Have secure container in which to ship your drive back to Plextor if necessary YOUR METHOD Find an empty space in your home office and fill it with th2. 69 14 Specifications 70 About Plextor 72 Warranty Information Inside Back Cover CHAPTER 1 Introduction Thank you for purchasing a Plextor 4PleX Plus the first self configuring CD ROM drive Your new drive is compatible with Microsoft Plug and Play SCAM specifica tions Throughoutthe rest of this manual we will occasionally refer to the 4PleX Plus as well as the internal and external model numbers For your purposes these references all apply to the 4PleX Plus CD ROM drive We appreciate the confidence you have shown in us Our goal is to put you and keep you on the leading edge of CD ROM drive performance To get you there wefirsthaveto help you install your 4PleX Plusdrive properly and operate itcorrectly After that the responsibility is yours to seek the applications that make a CD ROM drive such a powerful and exciting addition to your system For those of you with PCs the installation process may seem a bit complicated M ac people have it easy Fear not We have successfully walked through the installation process with many customers who previously had lived in mortal terror ofthe innards of their computer In this manual you should find all the information you need to successfully install and operate your drive However if you run into a problem CALL US see Chapter 13 for the different ways you can contact us The call istoll free You will
3. 07 n Pre DC NPUT TERM Audio utput Connector utputs stereo analog signal U se to connectto sound board or audio amplifier SCSI Interface Connector Connects to SCSI interface board using 50 pin to 50 pin flat ribbon SCSI cable Jumpers Use to select SCSI ID number parity term test block size and eject lock options Leave these jumpers at their factory settings unless one or more of the following situations pertain to you SCSI ID number If you are using more than one SCSI peripheral you may have to change your SCSI ID number See page 15 Block size If you are working in a UNIX environmentand want to boot your CD ROM drive see page 17 Eject lock If you work in an environment where you need to prevent others from easily removing a CD ROM disc from your drive see page 17 Power Connector Connects to your computer s power supply DC 5V and 12 10 45 OPERATION MANUAL CHAPTER 5 Drive Features PX 45CE External Drive FRO NT PANEL Door Closed FrontDoor Caddy Slot Emergency Eject Hole Stop Eject Button gt Volume Audio CD Play Button Headphone Jack Q ON BUSY Indicator DISC Indicator Front Door O pen to insert caddy O Caddy Slot Insert caddy after opening door O Emergency Eject H ole Insert paper clip or other thin rigid objectto eject caddy if automatic eject button O
4. Factory setting is Enabled ON See page 18 for an explanation of SCSI termination and to determine if you need to change this setting Leave this OFF It is for factory use only Leave this O FF unless you are working in a UNIX environment and want to boot from your CD ROM drive If so set this switch jumper ON In most situations you will wantto leave this switch jumper OFF However if you are in an environment where you want to prevent others from borrowing or stealing the disc inserted in your drive e g the drive is located in a public place where multiple people have unlimited access you can activate the Eject Lock feature To do so setthis switch jumper ON When this switch jumper is ON itis impossible to eject a disc inserted in the drive by pressing the Eject button A software eject command must be issued for the disc to ejectfrom the drive Check your device driver manual for instructions on how to issue a software eject command PX 43CE PX 45CE OPERATION MANUAL 17 KE CHAPTER 7 Termination YOUR TASK Find the location of the SCSI termination jumper or switch YOUR OBJECTIVE Determine if you must disable the SCSI termination YOUR METHOD Your drive was shipped with termination enabled If necessary remove termination jumper or turn off SCSI termination DIP switch by following instructions below You must enable SCSI termination if the PX 43CE or PX 45CE is the only SCSI peripheral used
5. RD alae e a a 12 Drive Switch Jumper Dial Settings PX 43CE Internal Drive 14 SCSI ID Number 15 PX 45CE External 16 SCSI ID Number 16 Other Switch Settings 16 Termination PX 43CE Internal Termination 19 PX 45CE External Termination 19 8 Hardware Installation 20 Board Installation 21 Drive Positoning 24 Mounting an Internal Drive 25 External Drive Installation 29 Soundboard Installation 32 33 9 Software Installation 35 DOS Windows3 1 amp 3 11 36 FWB Toolkit for Macintosh 42 OSD ks EC 43 Windows NT 3 51 and Below 44 10 Using CD ROM Discs Caddies 46 Inserting the Disc into a Caddy 46 Loading the Caddy into Drive 47 Removing the Caddy from the Drive 48 Cleaning 016 48 11 How To Play Audio CDson YourDrive 49 12 Troubleshooting 52 13 Contacting Plextor s Technical Support Department 67 How to Contact a 68 Before You CallFAX LogOn 68 RETAS zs uo 69 Helpful Contact Phone FAX BBS Numbers
6. does not work Turn off power before using this feature Stop Eject Button Push to eject caddy However during Audio CD play mode push once to stop audio play and twice to eject caddy Audio CD Play Button Push to put drive in Audio CD play mode Push button once during CD play mode to skip Push and hold down play button more than one second to fast forward Q ON BUSY Indicator Yellow when power is turned on Flashing when disc is inserted and being accessed Off when disc is inserted and not being accessed DISC Indicator Green when power is on and disc is inserted Off if no disc is inserted Volume Control Controls volume of headphone jack This control has no effect on the rear panel audio outputs Headphone Jack Stereo mini jack for headphones and powered speakers PX 43CE PX 45CE OPERATION MANUAL 11 KE CHAPTER 5 Drive Features PX 45CE External D rive REAR PANEL DIP Switches Power Switch scsiiD ail gt scsi out M eet scsi 0 8 L 99 AUDIO OU c 1 2 Audio O utput scsi Connector RCA jacks AC Power Input DIP Switches U seto set parity term test block size and eject lock options Leave these switches at their factory settings unless either or both of the following situations pertain to you Term Review Chapter 7 to determine if you need to turn your terminator switch off Block s
7. with your computer In addition you must enable termination if you are using multiple SCSI peripherals with your computer and the or PX 45CE is positioned as the last peripheral in a daisy chain If you have internal SCSI peripherals only or external SCSI peripherals only but not both then you should be using an internal ribbon cable or daisy chained external cables respectively but not both In this case all devices between the host adapter and the last peripheral on the opposite end of the ribbon cable or the last peripheral at the end of your daisy chain should have their termination removed disabled or turned off If you have both internal and external SCSI peripherals both the internal and external connectors of your host adapter are used then the termination of your SCSI host adapter should be removed or disabled The last peripheral on your internal cable and the last peripheral on your external daisy chain should retain their termination All other SCSI peripherals connected to the host adapter should have their termination removed disabled or turned off NOTE Some host adapters and peripherals have the ability to disable and enable termination power This should not be confused with termination itself Termination power can and should be provided by at least one device attached to your SCSI host adapter Your Plextor CD ROM drive auto matically supplies termination power Any additional devices supplying t
8. CD ROM DRIVE A PLEX Rus PX 43CE Internal PX 45CE External Plextor reserves the right to make improvements in the products described in this manual at any time without prior notice Plextor makes no representation or warranties with respect to the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for any particular purpose Further Plextor Corp reserves the right to revise this manual and to make changes in its content without obligation to notify any person or organization of such revision or change This manual is copyrighted all rights reserved It may not be copied photocopied translated or reduced to any electronic medium or machine readable form without Plextor s prior permission Manual copyright 1995 Plextor Corp First edition September 1995 Licenses and Trademarks All licenses and trademarks are property of their respective owners Table of Contents AJIntroductoh 1669 Gne Boece ate ee Internal Drives 3 External Drives en 4 AGentleReminder 5 What Else Do I Need si PRECAUTIONS ne a acea tu RC ae Drive Features PX 43CE Internal Drive Front Panel 9 Rear Panel 10 PX 45CE External Drive Front Panel 11 Rear Panel a RR
9. ave an external drive you will also need a special bracket connector and an internal SCSI cable These should have been provided by the soundboard manufacturer They allow the internal SCSI connector on your soundboard to be linked or connected to your external drive If they were not provided by your soundboard manufacturer you will need to purchase them from a local computer supply store You also may need to update your device drivers See the discussion about device drivers in Chapter 9 of this manual Once you have assembled everything you need you re ready to install your drive But first a few words of caution are in order PX 43CE PX 45CE OPERATION MANUAL 7 CHAPTER 4 Precautions B YOUR TASK Read the list of precautions below aag YOUR OBJECTIVE Avoid any undo harm coming to you or your drive YOUR METHOD Review the list and use common sense Your new CD ROM drive is a precision electromechanical device Like the rest of your computer system it requires reasonable care in its installation and use Please read this manual carefully and keep it handy for easy reference Use this manual for installation operation and troubleshooting See your dealer or call Plextor s Technical Support D epartment should your drive require repair or service X Do notput your computer monitor or any other device weighing more than 30 Ibs on top of the 4PleX Plus external drive X Donotplace your drive in directsunlig
10. be connected to our friendly helpful band of tech support reps who know their stuff about CD ROM drives What might seem like a lost cause to you could very well be a 30 second fix to them Butwe will never know unless you CALLUS If you are having trouble please don t give up and don t take your drive back to where you bought it until you have spoken with one of our tech support reps This manual is designed to be followed in sequence It is aimed primarily atthose who will connect their 4PleX Plus drive to a PC Mac users should look for this symbol 2 Users of UNIX based systems should look for this symbol indicator of sections of manual that pertain to them Many of you reading this manual are experienced computer users who have successfully installed peripherals in the past There probably are a number of sections in this manual that you can skip over However we ask everyone from novice computer users to experienced computer professionals to read the sections marked with this symbol PX 43CE PX 45CE OPERATION MANUAL 1 CHAPTER 2 Box Contents YOURTASK Check the contents of the box YOUR OBJECTIVE Make sure you got everything you paid for YOUR METHOD Compare what you find in the box with the tables on the following pages W hat you should find in your Plextor box depends on two factors 1 what configu ration you purchased and 2 what the company that sold you the box p
11. e Plextor box If you received your 4PleX Plus CD ROM drive a Plextor box you should save the box after you have installed your drive There are many sets of hands some of them potentially unfriendly that a drive might go through on its way from usto you O ur box and its packaging material were designed and drop tested to ensure that your 4PleX Plus drive can endure rough treatment and still arrive in working order W e advise you to hold onto your box in case you should ever need to return your drive to Plextor for any reason U nfortunately some of our customers have not held onto their boxes and have had to resortto some less than secure methods to getdrives back to us We have received drives in a shoebox in an unpadded express mail envelope and in a box filled with buttered popcorn W e cannot assume liability for any damage your drive sustains during shipment Therefore please ship your drive in the safest manner possible W e believe your drive will be most secure if itis shipped in a Plextor box W e hope you will never have to ship your drive back to us If you do however we hope you will send it packaged in a Plextor box If you did not receive a Plextor box if for example your drive came pre installed in a computer we recommend that you pay a packaging store e g Mail Boxes Etc in your area to ship your drive The drives that we have received from most packaging stores have arrived in good shape If you don
12. e board to your new 4PleX Plus CD ROM drive 2 You own a SCSI interface board If you have only one other SCSI peripheral device and a Plextor internal CD ROM drive you can usethe SCSI ribbon cable we provided If you have more than one other SCSI peripheral you will need to purchase a different SCSI ribbon cable from your local computer supply store The cable must have at least as many connectors as you have SCSI peripherals including onefor your Plextor CD ROM drive plusone additional connector to attach to the interface board If you have an external Plextor CD ROM drive you will be able to include it in your daisy chain of other external SCSI peripherals with the cable we have provided if at least one of your other peripherals has the same kind of 50 pin Centronics SCSI connectors as your Plextor drive Be sure to read the section on Termination in Chapter 7 of this manual PX 43CE PX 45CE O PERATION MANUAL CHAPTER 3 What Else Do Need If you purchased your SCSI interface board several months or years before you purchased your 4PleX Plus drive you may need to update your device drivers See the discussion about device drivers in Chapter 9 of this manual 3 You own a soundboard that has a SCSI interface built into it e g Sound Blaster SCSI 11 You may need to use the SCSI cable and most important the audio cable we have included with your 4PleX Plus see page 33 for a discussion on audio cables If you h
13. ermination power will NOT cause any problems Remember nly the last SCSI peripheral in a daisy chain should have termination enabled If you have any SCSI devices chained after your PX 43CE or PX 45CE you must disable or turn OFF the PX 43CE s or PX 45CE s termination using the following instructions 18 43 45 OPERATION MANUAL CHAPTER 7 Termination PX 43CE Internal Termination The PX 43CE is shipped from the factory with its termination enabled To disable termination remove the jumper from the termination pins on the back panel of your drive Refer to the pictures on pages 10 and 14 for the location of the termination pins labeled Term They the fifth set of pins from the left If your drive already is installed in your computer be sure to turn off your computer power before removing or reinstalling the jumpers recommend that you retain the jumpers so you can reinsert them onto the termination pins if you later need to turn the drive s termination ON PX 45CE External Termination The PX 45CE is shipped from the factory with its termination turned ON To turn the termination O FF firstturn off the drive s power then change the second DIP switch on the rear panel of the drive to the OFF position Refer to the pictures on pages 12 and 16 for the location of the termination switch labeled Term It is the second of the five switches PX 43CE PX 45CE OPERATION MANUAL 19
14. gs of the PX 43CE 45CE This section will de scribe how to make these changes For information on 2 and 3 see page 17 Ifthe CD ROM driveistheonly SCSI peripheral you will use with your computer you do not need to boot from the CD ROM drive in a UNIX environment and if you do not plan to use the Eject Lock feature skip now to Chapter 8 Hardware Installation Take our word for it most of you can now skip to Chapter 8 PX 43CE PX 45CE OPERATION MANUAL 13 KE CHAPTER 6 Drive Switch Jumper D ial Settings PX 43CE Internal D rive Factory Setting of Jumper Block The functions shown are ON if the jumpers are installed and OFF if jumpers are removed The jumpers are set by the factory as follows Pin 3 Pin 2 Pin 1 ON Jumper installed O FF Jumper removed Installing and Removing Jumpers Ensure power to the drive is OFF before installing or removing jumpers To remove a jumper pull itoff with your fingers or a pair of needle nose pliers To add a jumper push itonto the jumper pins Three extra jumpers are supplied with the PX 43CE in addition to the four jumpers already installed at the factory Caution Install jumpers across each asshown Do not connect one pin switch to another by installing the jumpers lengthwise Doing so could result in damage to the drive Jumper Install Jumpers This Way Do NOT Install Jumpers This W ay 14 PX 43CE PX 45CE OPERATION MANUAL CHAPTER 6 Drive Switch Jum
15. ht on heating units or near electrical appliances which draw large amounts of current such as a high powered audio amplifier microwave oven toaster hair dryer etc V Keep the area around your drive clean from dust smoke and other contami nants v Use soft dust free cloth for cleaning your drive Do notallow moisture liquids including water cleaning fluids or solvents to touch the drive Thinner benzene or alcohol based solvents can mar your drive s surface To help ensure that your CD ROM discs remain free of dirt or other contaminants your drive requires a disc caddy Use only an industry standard disc caddy Do not insert a warped or cracked disc caddy into the drive V Keep your CD ROM disc clean See Chapter 10 for tips on handling and cleaning CD ROM discs X Do notdrop or jolt the drive X Do notattemptto open the drive and service it yourself Removing the cover may expose you to harmful electrical voltages or the laser beam For your safety entrust service to Plextor authorized service personnel only 8 5 OPERATION MANUAL CHAPTER 5 Drive Features Get know your drive YOUR OBJECTIVE Learn how to operate different features of the drive Learn what goes where Learn some terms that will be used elsewhere in the manual YOURMETHOD Match the parts of your drive to the diagrams below PX 43CE Internal Drive FRO NT PANEL Door Closed Front Do
16. ize If you are working in a UNIX environment and want to boot from your CD ROM drive see page 17 Eject Lock If you work in an environment where you need to prevent others from removing a CD ROM disc from your drive see page 17 O SCSI ID Usethis dial to designate SCSI ID number Rotate the dial to change the number If you are using more than one SCSI peripheral you may need to change your SCSI ID number see pages 15 and 16 Power Switch To turn power ON OFF AC Power Input Use the power cord supplied with your drive Audio Output utputs stereo analog signal RCA jacks Use to connect to audio amplifier or other audio equipment Q SCSI Interface Connector In and Out One connector should be used to link your CD ROM drive to your SCSI host adapter the other to link your CD ROM drive to another SCSI peripheral with a daisy chain cable see page 31 You may use either connector for either purpose 12 PX 43CE PX 45CE OPERATION MANUAL CHAPTER 6 Drive Switch Jumper D ial Settings gt YOURTASK Find the location of jumpers internal drive or switches and rotary dial external drive Check their settings Change them if necessary YOUR OBJECTIVE ensure that your new CD ROM drive can coexist peacefully with other equipment you might have installed in your computer To ensure that your drive will work properly after it is installed YOUR METHOD Find locations of jumpers switches rota
17. or Caddy Slot Audio CD Play Button Stop Eject Button Volume Emergency Eject Hole Control ON BUSY Indicator DISC Indicator Headphone Jack Front Door Open to insert caddy O Caddy Slot Insert caddy after opening door Audio CD Play Button Push to put drive in Audio CD play mode Push button once during CD play mode to skip Push and hold down play button more than one second to fast forward Stop Eject Button Push to eject caddy However during Audio CD play mode push once to stop audio play and twice to eject caddy Emergency Eject Hole Insert emergency eject stick paper clip or other thin rigid objectto eject caddy if automatic ejectbutton does not work Turn off power before using this feature PX 43CE PX 45CE OPERATION MANUAL 9 CHAPTER 5 Drive Features ON BUSY Indicator Yellow when power is on Flashing when disc is inserted and being accessed O ff when disc is inserted and not being accessed DISC Indicator Green when power is on and disc is inserted Off if no disc is inserted G Volume Control Controls volume of headphone jack This control has no effect on the rear panel audio outputs Headphone Jack Stereo mini jack for headphones and powered speakers PX 43CE Internal D rive REAR PANEL Audio utput Connector SCSI Interface Connector Jumpers Power Connector by LH 59 590 EJECT Sy 00
18. per D ial Settings SCSI ID Number It is possible to chain using a daisy chain cable up to seven SCSI peripherals to a single SCSI interface board or to the SCSI port of an Apple computer However when using multiple SCSI peripherals itis necessary to set each peripheral to a unique SCSI ID number Your Plextor CD ROM drive can be setto use one of eight SCSI ID numbers The drive should arrive with its SCSI ID set to 3 Accordingly if you already use another SCSI peripheral and its SCSI ID also is set to 3 you must change the SCSI ID number of either this peripheral or the CD ROM drive Changing the SCSI ID PX 43CE The SCSI ID number of the PX 43CE is determined by the placement of jumpers on pins 1 2 and 3 To find the location of Pin 1 Pin 2 and Pin 3 refer to the diagram of the Jumper Block on the previous page To change the SCSI ID number follow the chart below Jumper Installed Across SCSI ID Number Pin 1 Pin 2 Pin 3 0 No No No 1 YES No No 2 No YES No Stine 3 YES YES No 4 No No YES 5 YES No YES 6 No YES YES 7 YES YES YES For example the factory setting of the SCSI ID at 3 is made by installing a jumper on pin 1 and pin 2 of the jumper block leaving pin 3 uncovered To setthe SCSI ID at 7 you would install a jumper across pin 1 another jumper across pin 2 and a third jumper across pin 3 To setthe SCSI ID at 5 you would install a jumper across pin 1 and a jumper across pin 3 leaving pin 2 unco
19. ry dial on diagram in Chapter 5 Read below to determine if your drive s settings need to be changed If so follow the directions on making the necessary changes Your 4PleX Plus CD ROM drive needsto be flexible enough to work with the variety of computer systems PC Mac Sun Silicon Graphics DEC etc that can use SCSI peripherals To provide this flexibility Plextor gives its customers options on how a drive can be set before itis installed O n an internal drive settings are determined by the position of jumpers on the jumper block at the rear of the drive On an external drive settings are determined by the position of DIP switches and the rotary dial on the rear panel of the drive Fortunately we have a pretty good idea of the environment in which most of our drives will be used a single SCSI device connected to a PC or Mac Your drive ships from our factory with its jumpers switches dial set to work in this environment You should leavethe jumpersfound on the rear panel ofthe PX 43CE and the switches and rotary dial found on the rear panel of the PX 45CE at their factory settings unless 1 you plan to use another SCSI peripheral e g hard disk scanner with your computer system in addition to your CD ROM drive 2 you work in a UNIX environment and want to boot from your CD ROM drive 3 you want to utilize the Eject Lock feature If you plan to use additional SCSI peripherals you may need to change the jumper switch dial settin
20. t have a packaging store in your area call our tech support department for packaging pointers before you ship your drive In fact you should call our Technical Support Department to get an RMA number before returning any drive see Chapter 13 p 69 PX 43CE PX 45CE OPERATION MANUAL 5 S CHAPTER 3 W hat Else Do Need YOUR TASK Review the software and hardware installed in your Current computer system YOUR OBJECTIVE Determine what else you may need to operate your CD ROM drive YOUR METHOD Inventory your current computer system check list below If you are a PC owner and you purchased a Plextor box labeled Drive with 16 bit SCSI Interface Kit your needs are simple none The same holds true if you are Mac owner and purchased a Plextor box labeled Drive with Mac Kit Everything you need to successfully install and operate your 4PleX Plus CD ROM drive is included in the box you purchased The only thing you need to add isa CD ROM disc to play in your new drive If you are a PC owner who has purchased a 4PleX Plus Drive Only box life gets a bit more complicated You fall into one of three groups 6 1 You do not own a SCSI interface board In this case you have to get one Your local computer store and numerous mail order vendors carry them Call us if you need suggestions on which model to buy W ehave provided an internal SCSI ribbon cableoran external SCSI cable to connect th
21. ut in or took out while it was in their possession Plextor currently sells its 4PleX Plus drives in three configurations 1 DriveOnly 2 Drive with 16 bit SCSI Interface Board Kit 3 Drive with Mac Kit The configuration you received is indicated by stickers applied to your box Your drive may also have been integrated into a computer system or subsystem sold by a third party PLEASE A security sticker was applied to the top of your box The contents of NOTE your box were carefully checked before this sticker was applied If it was cut before you purchased the box you should carefully check the contents to ensure nothing has been removed If something is missing D you should contact the party from whom you purchased the box for an explanation There may be a perfectly good reason why the security sticker on the box was cut before you received it For example a dealer may have purchased a Drive Only configuration from Plextor then added a SCSI interface board and or software he had purchased separately before selling the box to you NOTE If your drive came pre installed in a computer the rails cables interface boards and other parts shown on the following pages may have been installed and may not be separately available 2 PXA3CE PX A5CE OPERATION MANUAL CHAPTER 2 Box Contents Use the following tables to check the contents of your box PX 43CE Internal Drives
22. vered PX 43CE PX 45CE OPERATION MANUAL 15 JL CHAPTER 6 Drive Switch Jumper D ial Settings PX 45CE External D rive SCSI ID Number Please see description at the top of page 15 Itis also applicable to the external drive Factory Setting of D ial and DIP Switches Caution Turn the drive s power OFF before changing the setting of the dial or DIP switches The SCSI ID number of the PX 45CE is determined by the position of the pointer on the SCSI ID rotary dial The drive should arrive with its SCSI ID set to 3 The rotary dial and DIP switches are set by the factory as shown below 0 1 OFF BLOCK Changing the SCSI ID Using the blade of a screwdriver rotate the dial s arrow to different SCSI ID number Changing DIP Switch Settings Use screwdriver pen or paper clip to push the DIP switches to an FF or ON setting Other Switch Jumper Settings PX 43CE PX 45CE The remaining switches external drives and jumpers internal drives are Leave this ON The parity check provided by the ON setting enhances the reliability of the SCSI bus Setto OFF only if your computer system or SCSI controller specifically requests that parity be disabled 16 43 45 OPERATION MANUAL Term Test Block Eject CHAPTER 6 Drive Switch Jumper D ial Settings This enables or disables turns or OFF SCSI termination
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