Exabyte EXB-8205 manual Scsi Cable, General Requirements

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Appendix A Installation Requirements

This appendix lists the requirements for the following items: SCSI cable

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SCSI connector Power cable Power connector

It also provides guidelines for attaching the tape drive to a frame and adding optional chassis grounding.

SCSI Cable

The SCSI cable for connecting the tape drive to the host is not provided with the tape drive. You must provide a cable that complies with the appropriate safety and regulatory agency requirements. To comply with FCC, Canadian DOC, and VDE limits, the tape drive requires shielded cables when the cables are external to the mounting enclosure.

General Requirements

Use a 50-conductor flat cable or 25-signal twisted pair cable. A minimum conductor size of 28 AWG is recommended to minimize noise effects and ensure proper distribution of terminator power.

Ideally, to match the cable terminators, the cable should have a characteristic impedance of 122 ohms (differential) or

132ohms (single-ended). However, since cables with this high of a characteristic impedance are not generally

available, somewhat lower impedances are acceptable. A characteristic impedance of 100 ohms ± 10% is recommended for unshielded flat or twisted-pair ribbon cable. A characteristic impedance greater than 90 ohms is recommended for shielded cables.

Note: To minimize discontinuities and signal reflections, ensure that cables used on the same bus have the same impedances.

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EXB-8205 and EXB-8505 (Standard and XL)

302967

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Contents Qvwdoodwlrqdqg 2SHUDWLRQ 302967-001302967 May Contents Welcome Conventions Used in This Guide For More InformationInstalling the tape drive Tools and equipment for installing the tape driveUnpacking and Handling the tape drive Setting the Scsi ID Setting the Scsi ID with JumpersSetting the Scsi ID with a Remote Switch Jumper settings for the tape drive’s Scsi IDPreparing the Tape Drive for the Scsi Bus Termination for a Single-Ended tape driveTermination for a Differential tape drive Replacing the R-PacksInstalling the Tape Drive in a Computer Connecting the Scsi CablePreparing the Computer System Installation Procedure Attaching slide rails to the tape drive 302967 Connecting the power cable to the tape drive Performing the Initial Power On Tape Drive Stored for Less Than Six MonthsTape Drive Stored for Six Months or More Operating the tape drive Reading the LEDs Tape drive states indicated by the LEDs Tape Drive State LEDsSelecting Data Cartridges Choosing High-Quality Data CartridgesExatape 160m XL 8mm Data Cartridges Compatibility of Exatape 8mm Data CartridgesCompatibility of Exatape 8mm Data Cartridges Setting the Write-Protect Switch on a Data Cartridge Write-protect switch on an Exatape 8mm data cartridgeLoading a Data Cartridge in the tape drive Unload Procedure Error During Unload ProcedureUnloading a Data Cartridge Preventive Maintenance Determining When to Clean the Tape DriveUsing the 8mm Cleaning Cartridge Caring for Data Cartridges Maintain the storage environment at a constantReplacing Data Cartridges Do not store a data cartridge on its sideDimensions and weights of tape drive shipping cartons Shipping the Tape DrivePacking the Tape Drive Single-pack carton and packing materials Environmental specifications for shipping the tape drive Environmental Requirements for ShipmentScsi Cable General RequirementsScsi Connector Cable Length Requirements for Differential ConfigurationsCable Length Requirements for Single-Ended Configurations Power Supply Power ConnectorPower specifications for the tape drive Attaching the tape drive to a Frame Mounting holes on the sides of the tape drive Chassis Grounding Optional Appendix B Unload Button Options Summary of unload button optionsMay Appendix C Tape Drive Specifications Index Unload button