HP VS80 User Manual download pdf (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:

■ 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.

■ 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.

■ 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.

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HP VS80 User Manual Page 53