Actidata actiLib Autoloader 2U, Руководство пользователя и обслуживания

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8 Troubleshooting
8.1 Installation problems
Problems encountered during the installation of the library 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 library after installation,
check the following:

SCSI ID : The library 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 library or tape drive
before you can use the library. 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 : use dual LUNs to control the tape drive (LUN 0) and library robotic (LUN 1).
These models require an HBA that supports LUN scanning and LUN scanning must be enabled.

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 library 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 library is the only SCSI device
— other than the SCSI host adapter — on the
selected SCSI bus, it must be terminated. Likewise, if the library 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 library, locate the terminator in the accessories package and press it firmly
into either of the two SCSI connectors on the back panel of the library. Secure the terminator
by tightening the finger-screws unti
l 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 library 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 or backup application vendor.
NOTE: The host bus adapter for the library should be SCSI-3 LVDS. A single-ended SCSI host bus
adapter will severely degrade performance. Also, if there are any SE devices on the same
SCSI bus, the entire SCSI bus will negotiate down to SE speed and severely degrade
performance.