User's Guide

FastStor 2 User’s Guide 39
Troubleshooting and Diagnostics
This section contains information on troubleshooting and diagnosing your autoloader.
Installation Issues
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 for the tape drive and one SCSI ID for the autoloader
robotics. 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 Viewing or Changing the SCSI IDs
on page 21 for
instructions about changing the autoloader SCSI IDs.
• 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 19 feet (6 meters) for a SCSI-1 SE bus, 10 feet (3 meters) for a Fast SCSI (Narrow or Wide)
or an Ultra SCSI (Narrow or Wide) SE bus, 40 feet (12 meters) for an LVD bus with multiple devices,
or 82 feet (25 meters) for an LVD bus with a single device. 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.
• Termination—If the autoloader is the only SCSI device—other than the SCSI host system
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. 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 works 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 LVD bus.
• Compatibility—Ensure that the autoloader is compatible with the SCSI host system adapter and
backup application you plan to use. For a list of compatible SCSI adapters and application software,
check with your SCSI host system adapter manufacturer, backup application vendor, or contact
your service representative (refer to Getting Help
on page 58).