HP vs80 - Manual (Page 53)

Chapter 4 Diagnostics and Troubleshooting 53
Troubleshooting Installation Problems
Problems encountered during the installation of the autoloader are usually
caused by improper SCSI bus configuration, application software
configuration errors, or by an incorrectly configured operating system. If the
application software that you are using is not communicating with the
autoloader after installation, check the following:
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SCSI ID:
The autoloader uses one SCSI ID and two Logical Unit Numbers (LUNs):
one LUN for the tape drive (0) and one for the autoloader robotics (1).
Depending on other devices attached to the same SCSI bus and their SCSI
IDs, you may need to change the SCSI ID of the autoloader before you
can use the autoloader. Select an unused SCSI ID. See the manuals for the
other devices on the SCSI bus or your operating system to determine which
SCSI IDs are currently in use. If the autoloader is attached to a narrow
(50-pin) SCSI bus, only SCSI IDs 0 through 7 are available. See Changing
the SCSI ID on page 41 for instructions.
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SCSI Cabling:
Verify that all SCSI cables are securely connected at both ends. Check the
length and integrity of your SCSI cabling. The total length of all cables
connected to a SCSI bus must not exceed 6 meters (19 feet) for a SCSI-1
SE bus, 3 meters (10 feet) for a Fast SCSI (Narrow or Wide) or an Ultra
SCSI (Narrow or Wide) SE bus, 12 meters (40 feet) for an LVD bus with
multiple devices, or 25 meters (82 feet) for an LVD bus with a single
device. The length of the internal SCSI cabling inside the autoloader is 30
cm (1 ft). This length must be included in any calculations of cable length.
Try replacing suspect cables with known good cables.
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Termination:
If the autoloader is the only SCSI device - other than the SCSI host adapter
- on the selected SCSI bus, it must be terminated. Likewise, if the
autoloader is physically the last SCSI device on the SCSI bus, it must be
terminated. Only the devices physically at the beginning and end of the
SCSI bus should be terminated. Refer to the manuals supplied with other
devices on the SCSI bus for information on enabling or disabling
termination on those devices.