HP StorageWorks DLT VS80, Руководство пользователя и сервисное руководство

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Diagnostics and troubleshooting 48
Troubleshooting
Installation problems
Problems encountered during the installation of the autoloader are usually caused by improper SCSI
bus configuration, application software configuration errors, or 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:
Ultrium 230, Ultrium 460 and SDLT 320 models : The autoloader uses one SCSI ID for the tape
drive and another SCSI ID for the autoloader robotics.
DLT VS80, Ultrium 960 and Ultrium 448 models : The autoloader uses a single SCSI ID.
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 or tape drive before you can use the autoloader. Review
the manuals for the other devices on the SCSI bus or your operating system to determine which
SCSI IDs are currently in use. See ” Changing the SCSI ID ” on page 49 for instructions.
• LUN Scanning: DLT VS80, Ultrium 960 and Ultrium 448 models use dual LUNs to control the
tape drive (LUN 0) and autoloader robotic (LUN 1). These models require an HBA that supports
LUN scanning and LUN scanning must be enabled, see also ” LUN scanning ” on page 19.
• SCSI Cabling: Verify that all SCSI cables are securely connected at both ends. Check the length
and integrity of your SCSI cabling. Check the SCSI connector for bent pins. The length of the
internal SCSI cabling inside the autoloader is 2 feet (60 cm). This length must be included in any
calculations of cable length.
• For LVD SCSI the maximum length for a single device is 82 feet (25 meters). For multiple
devices, the maximum combined internal/external length is 40 feet (12 meters).
• If you have a combination of LVD and SE devices on the bus, the maximum cable length
reverts to the SE specification, which for Ultra devices is 10 feet (3 meters) for four or fewer
devices, and 5 feet (1.5 meters) for more than four devices.
• 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 located 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.
• To terminate the autoloader, locate the terminator in the accessories package and press it
firmly into either of the two SCSI connectors on the rear panel of the autoloader. Secure the
terminator by tightening the finger-screws until snug. The supplied terminator is “dual mode”
and will work on both Low-Voltage Differential (LVD) and Single Ended (SE) SCSI buses.
Check all SCSI and power connections and confirm that the unit is attached to a valid SCSI
SE or LVDS bus.
• Compatibility: Ensure that the autoloader is compatible with the SCSI host adapter and backup
application you plan to use. For a list of compatible SCSI adapters and application software,
check with your SCSI host adapter manufacturer, backup application vendor, or the HP support
website at www.hp.com/support .