Quantum ValueLoader DLT VS160, Инструкция по установке и эксплуатации

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Chapter 5: Troubleshooting Your Tape Drive
5-6 January 2004 81-81191-01 Rev A01
The server or
workstation does not
recognize your DLT
VS160 tape drive. The SCSI bus might be
improperly terminated. • If your tape drive is the last or only device on the
SCSI bus, make sure the tape drive is properly
terminated.
• If your tape drive is not the last or only device on
the SCSI bus, check all the SCSI cable
connections and make sure the last device on the
SCSI bus is terminated.
• Make sure termination is set properly on the
SCSI host adapter.
• If you attach the tape drive to a narrow (50-pin)
SCSI bus, you must use a customer-supplied
68-pin to 50-pin adapter that terminates the
unused 18 pins. These adapters are sometimes
labeled “high-byte termination.”
• Regardless of which device terminates the SCSI
bus, it must have power applied and be powered
on for proper termination to occur.
The SCSI terminator might
not be at the end of the SCSI
bus or more than two
terminators might be present
on the SCSI bus. Make sure the terminators are placed only at each
end of the SCSI bus—normally one at the host
adapter and one on the last device on the bus.
However, if both internal and external devices are
attached to the same SCSI host adapter, the adapter
may be positioned in the middle of the SCSI bus and
should not be terminated. In that case, terminate the
SCSI devices on each end of the bus.
The SCSI host adapter might
be in a defective expansion
slot. Move the SCSI host adapter to a different expansion
slot.
The SCSI bus might be too
long. Make sure the total length of the SCSI bus does not
exceed the following ANSI SCSI standards”
•
19 feet (6 meters) for a (SE) bus
• 40 feet (12 meters) for a LVD) SCSI bus with
multiple devices
• 82 feet (25 meters) for an LVD SCSI bus with a
single device.
Note : If you attach the tape drive to a SE bus, or if
there are any SE devices attached to the bus, the bus
is limited to the maximum cable lengths of an SE
bus.
Table 5-2.
Tape Drive and Connectivity Troubleshooting (Continued)
Symptom Problem Solution