HP StorageWorks MSL2024, User'S And Service Manual

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Figure 92 MSL8048 and MSL8096 parallel SCSI tape drive default SCSI addresses
.
1. Tape drives with SCSI address 4
Depending on other devices attached to the same parallel SCSI bus and their SCSI IDs, you
may need to change the SCSI ID before using the device. Review the manuals for the other
devices on the parallel SCSI bus or your operating system to determine which SCSI IDs are
currently in use. Change the SCSI ID with the OCP (for the MSL2024 see “
Changing the SCSI
address — parallel SCSI devices (Configuration > Change Drive) ” on page 115, for the
MSL4048, MSL8048, and MSL8096 see “ Changing the drive configuration (Configuration >
Drives) ” on page 144) or RMI (see “ Changing the drive configuration ” on page 87).
• Verify that all parallel SCSI cables are securely connected on both ends. Check the length and
integrity of your parallel SCSI cabling. Check the parallel SCSI connector for bent 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 Library:
• 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 Library.
NOTE:
Many RAID or array controllers do not provide multiple LUN support.
HP StorageWorks MSL2024, MSL4048, MSL8048, and MSL8096 Tape Libraries User and service
guide 155