HP BL536A User's & Service Manual page 87

pins. The length of the internal parallel SCSI cabling inside the device is 0.5 m (1.6 ft).
This length must be included in any calculations of cable length.
– For LVD SCSI, the maximum length with only a single device on the parallel SCSI
bus is 25 m (82 ft).
– For Ultra 320 or multiple devices on an LVD bus, the maximum combined
internal/external length is 12 m (40 ft).
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 3 m (10 ft) for four
or fewer devices, and 1.5 m (5 ft) for more than four devices.
If the application software or operating system detects the tape drive, but not the Autoloader:
◦
Verify that multiple LUN support is enabled on the HBA. The device uses two Logical Unit
Numbers (LUNs) to control the tape drive (LUN 0) and robotic (LUN 1). The device requires
an HBA with multiple LUN support and multiple LUN support must be enabled on the host
computer. When multiple LUN support is not enabled, the host computer can see the tape
drive, but not the Autoloader.
NOTE: Many RAID or array controllers do not provide multiple LUN support.
If the application software or operating system does not detect any devices on the HBA:
◦
Verify that your parallel SCSI host adapter is installed correctly. Refer to the manual that
came with your parallel SCSI host adapter for installation and troubleshooting instructions.
Pay particular attention to any steps describing configuration settings. Make sure that the
host adapter is properly seated in the motherboard slot and the operating system correctly
detects the host adapter. Make sure that the proper device driver is installed for the
parallel SCSI host adapter.
If the Autoloader is detected by the operating system, but not by the application software:
◦
Refer to the documentation included with your backup application for instructions on how
to verify proper installation. Some backup software packages require an additional
module to communicate with the robotics.
If the Autoloader is detected by the operating system, but is listed as an unknown or generic
device:
◦
Make sure that the proper device driver, if applicable, is installed for the device. Check
your software provider's website for the latest drivers and patches.
NOTE: Many backup applications use their own drivers. Before installing a driver,
make sure it is not in conflict with the application software.
If you continue to have problems with a parallel SCSI Autoloader, check the following:
Ensure that the device is compatible with the parallel SCSI host adapter and backup application
you plan to use. For a list of compatible parallel SCSI host bus adapters and application
software, check with your parallel SCSI host adapter manufacturer, backup application vendor,
or the HP support website at www.hp.com/go/ebs.
Detection problems after installing a parallel SCSI device 87