actiLib Autoloader 1U
– User and Service Guide
Page 70 of 97
8
Troubleshooting
8.1
Installation problems
Problems encountered during the installation of the loader 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
loader after installation, check the following:
8.1.1 SCSI ID
The loader 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 loader or tape drive before you
can use the loader. Review the manuals for the other devices on the SCSI bus or your
operating system to determine which SCSI IDs are currently in use.
8.1.2 LUN scanning
Use dual LUNs to control the tape drive (LUN 0) and loader robotic (LUN 1). These models
require an HBA that supports LUN scanning and LUN scanning must be enabled.
8.1.3 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 loader 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.
8.1.4 Termination
If the loader is the only SCSI device
— other than the SCSI host adapter — on the selected
SCSI bus, it must be terminated. Likewise, if the loader 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 loader, locate the terminator in the accessories package and press it
firmly into either of the two SCSI connectors on the back panel of the loader. 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.
