HP StorageWorks DAT Tape Drives User Guide - SCSI (April 2005)

HP StorageWorks DAT Tape Drives User Guide 31
3. Push on the extractor lever to complete the insertion and to lock the tape drive in place.
Figure 15 Inserting the tape drive
4. If there are empty bays, insert a blanking plate. This is essential to ensure adequate airflow is
maintained. Failure to do so may affect tape drive performance.
Set the drive’s SCSI ID
To set the tape drive’s SCSI ID you need to set the appropriate switch on the rear of the tape array.
The number of address switches corresponds to the number of tape drives that can be inserted into
the tape array.
Each device on the SCSI bus must have a unique SCSI ID.
• For HP ProLiant servers where the tape drive is connected to the built-in SCSI bus, we
recommend that the tape drive is assigned a SCSI ID between 1 and 6.
• For all other servers and when used with separate HBAs, it can be assigned any unused ID
between 0 and 15. Do not use SCSI ID 7, which is reserved for the SCSI controller. SCSI ID 0 is
typically assigned to the boot disk and should also not be used unless the tape drive is on a
dedicated SCSI bus.
Typically, the HP Tape Array may hold up to four tape drives where each drive is attached to a
separate server. Under this configuration, the SCSI IDs of each tape drive will not conflict with each
other as they are each installed onto a separate SCSI bus.
However, if you daisy-chain devices make sure that the devices are of the same SCSI type and that
each device on the same SCSI bus has a unique SCSI ID. Do not daisy-chain more than two devices
on the same SCSI bus and make sure that the end device is terminated.
1. Decide which SCSI ID to use.