HP Q1581A HP StorageWorks DAT SCSI Tape Drives user guide (Q1573 - 90905, Febr - Page 35

Set the drive’s SCSI ID, Inserting the tape drive

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Figure 16 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. For many operating systems you can install HP Library & Tape Tools from the HP StorageWorks Tape CD-ROM and run the "Install Check" to check your computer's current SCSI configuration (see "Diagnostic tools" on page 55). This will provide information about the SCSI bus and the SCSI IDs in use. The UNIX Configuration Guide on the HP StorageWorks Tape CD-ROM, also provides instructions on how to determine the SCSI IDs of existing devices. 2. Set the appropriate switch. Figure 5 shows the address switch on the back panel of the HP Tape Array 5300. DAT SCSI Tape Drives 35

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Figure 16 Inserting the tape drive
4.
If there are empty bays, insert a blanking plate. This is essential to ensure adequate air
fl
ow 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 con
fi
guration, the SCSI IDs of each tape drive will not con
fl
ict 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.
For many operating systems you can install HP Library & Tape Tools from the HP StorageWorks Tape
CD-ROM and run the “Install Check” to check your computer’s current SCSI con
fi
guration (see
“
Diagnostic tools
” on page 55). This will provide information about the SCSI bus and the SCSI IDs
in use. The
UNIX Con
fi
guration Guide
on the HP StorageWorks Tape CD-ROM
,
also provides
instructions on how to determine the SCSI IDs of existing devices.
2.
Set the appropriate switch. Figure 5 shows the address switch on the back panel of the HP Tape
Array 5300.
DAT SCSI Tape Drives
35