HP StorageWorks DAT 72x10 Tape Autoloader - Manual (Page 51)

5 Troubleshooting
Using HP Library & Tape Tools to diagnose problems
With HP Library & Tape Tools installed on the host server
• Identify all SCSI devices connected to your system
• View detailed configuration, identification, inventory, and drive information for the autoloader
• Easily update autoloader and drive firmware
• Run advanced diagnostic tests, including connectivity, read/write, media validation, and testing
the functionality of the autoloader
• View autoloader and drive error logs
• Generate a detailed support file that can be e-mailed or faxed to your support representative
for analysis
The HP Library & Tape Tools diagnostic provides an intuitive graphical user interface with integrated
context-sensitive help. It can be downloaded free of charge from www.hp.com/support/TapeTools .
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: 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.
• LUN Scanning: The autoloader uses two LUNs to control the tape drive (LUN 0) and autoloader
robotics (LUN 1). Therefore the HBA must support LUN scanning and LUN scanning must be
enabled. If the HBA does not support LUN scanning or it is not enabled, only the drive will be
detected.
• 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 20 cm (7.87 in.). 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 back 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.
DAT 72x10 1U Tape Autoloader 51