Tip 3000: Scsi Interface - Dell PowerVault 130T DLT Service Manual

TIP 3000: SCSI Interface

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