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TIP 3000: SCSI Interface
PowerVault 130T Service Manual
2–8
4473D
TIP 3000: SCSI Interface
Use this TIP to troubleshoot and repair problems with the SCSI interface.
Symptom Explanation
Conditions That Could Cause This Problem
The operating system does not
recognize the library or the tape
drives.
SCSI cables may be loose.
SCSI terminators may be missing or loose.
The SCSI terminator might not be at the end of the
bus or there may be more than two terminators
present.
The SCSI bus may be too long.
Too many devices may be on the bus.
Your system may not be configured to recognize the
electronics module or tape drive SCSI IDs.
1. Are the SCSI cables properly
connected?
Yes: Go to step 2.
No: Reseat the connectors.
2. Are there SCSI terminators at both
ends of the bus?
Yes: Go to step 3.
No: Add SCSI terminators.
3. Are there more than two
terminators present?
Yes: Go to step 4.
No: Remove extra terminators so there are no more
than two present.
4. Is the length of the SCSI bus
within specification?
Yes: Go to step 5.
No: Connect a shorter SCSI cable.
5. Are there more than the maximum
permitted number of devices on
the SCSI bus?
Yes: Go to step 6.
No: Check the library and drive configurations for valid
IDs.
6. Is the system configured to
recognize the tape drives?
Yes: Go to step 7.
No: Reset the tape drive SCSI IDs.
7. Is the system configured to
recognize the library?
Yes: Go to step 8.
No: Reset the library SCSI ID.
8. Place a service call.
NOTE: Most SCSI adapters provide an internal terminator, so no external terminator is
required.
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