Spectra Logic 2K - Manual (Page 63)

Chapter 7. Maintenance, Troubleshooting, and Repairs
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Troubleshooting SCSI Problems
To troubleshoot problems with a SCSI device:
1. Make sure that each SCSI device in your SCSI chain has a unique SCSI ID. If two
or more devices have the same ID, the computer may stop when you try to use
the library robotics, or it may fail to recognize other SCSI devices.
2. Check that the SCSI host adapter card is firmly seated in the card slot in your
server computer.
3. Make sure that the SCSI bus is terminated at both ends.
4. Make sure that the terminator is correct for the type of SCSI bus you are using.
• Differential configurations require differential SCSI terminators.
• Single-ended terminators can be passive or active, but must be the same at
both ends of the SCSI bus.
• LVD configurations require LVD terminators.
5. Check for bent pins on the cable connectors. Make sure that all cable connectors
are firmly seated and screwed in, if possible.
6. Make sure that the chain of SCSI devices is compatible.
• SCSI-3 devices may not function on SCSI-2 cables.
• SCSI-2 devices may not function on SCSI-3 cables.
7. Recalculate the length of the SCSI bus including the cables inside the library and
server computer. The maximum length specified in Appendix B. SCSI Cable and
Terminator Requirements includes the cables inside the library.
Troubleshooting the Bar Code Reader
To troubleshoot problems with the bar code reader:
1. Make sure that the backup software’s bar code feature is enabled.
2. Make sure that bar code labels are compliant with the standards listed in About
AIT Bar Code Labels on page 35.
3. Make sure that all bar code labels are installed parallel to the cartridge edge
(Figure 7-4).
4. If none of these steps resolve the problem, call Spectra Logic Technical Support.
Figure 7-4 Sample AIT bar code label applied to a data cartridge.