HP Surestore DVD-ROM Tape Array Module - Manual (Page 11)

Step 2: Set the drive's SCSI ID
Note SCSI IDs for drives in the tape array are set on the back panel of the array. HP Surestore DVD-
ROM rack-ready drives can be assigned any unused\D between 1 and 6. Do not use SCSI
ID 7, which is reserved for the SCSI controller, or SCSI ID 0, which is typically assigned to the
boot disk.
1 Decide which SCSI ID to use.
Set the appropriate switch, as shown in figure 2. If you daisy-chain devices, make sure that
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.
The HP Surestore Tape Array 5300 has four SCSI ID switches to enable the installation of up
to four half-height drives. Note
Note
Make sure that an appropriate SCSI terminator is attached to the spare SCSI connector on the
back of the tape array. If you daisy-chain devices, make sure that the end device is terminated.
Write the model name, product number, serial number, and SCSI ID of your drive at the front
of this guide for future reference. The product and serial numbers are on a label on the side of
the drive.
SCSI cables and terminators
HP Surestore DVD-ROM rack-ready devices require no SCSI cables to plug into an HP
Surestore Tape Array 5300. However, cabling and terminators are required to connect the
tape array with the SCSI host.
The HP Surestore DVD-ROM rack-ready drive is a fast, narrow, single ended SCSI peripheral,
therefore, its maximum throughput (burst rate) is 20 MB/sec. However, incorporated into the
HP Surestore DVD-ROM rack-ready module, the DVD device can be connected to an LVD SCSI
bus without affecting the performance of any native LVD devices on that bus, as long as there
are no other single ended devices on the bus. For example:
• If you connect an LVD SCSI peripheral with a transfer rate of 80 MB/sec to the same bus as
the DVD device, which has a transfer rate of 20 MB/sec and is a narrow single ended
device, the performance of both devices is unaffected.
• However, if you connect another single ended device, such as an HP Surestore DAT 24
tape drive, to the same bus as the DVD device the bus performance will be restricted.
Refer to your HP Surestore Tape Array 5300 Getting StartedGuide\or details of how to install
SCSI cables and terminators to the SCSI connections on the rear panel of the tape array. The
latest version of this document can be downloaded from / / w w w . h p . c o m / s u p p o r t /
t a p e a r r a y .
You will need to order the correct length and SCSI connector type cables and terminators to
suit your particular configuration. Cable and terminator options are listed at the HP tape array
support website:
/ / w w w . h p . c o m / s u p p o r t / t a p e a r r a y , and can be ordered from your
local HP sales office.