Step 3: Connect The Scsi Cable - HP Ultrium 232e Getting Started Manual

Step 3: Connect the SCSI cable

A 68-pin, wide, VHD-to-HD SCSI cable is provided to connect your HP StorageWorks Ultrium
tape drive to a VHD SCSI port on an LVD SCSI bus. If your server has an HD SCSI port, you
must either purchase and install a VHD-to-HD adapter or use an HD-to-HD cable instead of
the supplied cable. Refer to our web site for recommended products:
connect .
Caution To avoid damaging the server or tape drive, ensure that both are powered off while you
attach the SCSI cable.
1
Make sure you are connecting to a recommended SCSI bus type. For optimum performance
your tape drive should only be connected to a SCSI bus that can transfer data at a rate that
supports the tape drive's maximum burst transfer speed. See "Step 1: Check the SCSI
connection" on page 11. Do not connect the tape drive to a single-ended SCSI bus, to the
same bus as your disk drive or to a RAID controller.
2
Perform a normal system shutdown and turn off power to the server and any connected
peripherals.
3
Attach the VHD connection on the SCSI cable to the server's external SCSI connector and
secure it by tightening the screws.
4
Attach the HD connection on the SCSI cable to the SCSI-IN connector on the rear panel of the
tape drive and secure it by tightening the screws. (See Figure 5.) Do not connect the cable to
the SCSI-OUT connector.
The SCSI-OUT connector is only used when daisy-chaining two devices. This is not
recommended. If you do so, do not mix drive families (only daisy-chain with other Ultrium
tape drives) and do not put drives on the same bus as any Ultra 320 device, such as the
Ultrium 960 tape drive
Does the tape drive need a terminator?
If the tape drive is on a dedicated SCSI bus, it does not require a terminator. When the
cable is connected to the SCSI-IN connector, the enclosure provides active termination.
If it is not the only device on the SCSI bus, you must make sure that the SCSI bus is
terminated. You can do this in two ways:
• Place the tape drive at the end of the chain and attach the HD connection on the SCSI
cable to the SCSI-IN connector; the enclosure provides active termination.
• Attach the HD connection on the SCSI cable to the SCSI-IN connector and use the SCSI-
OUT connector on the tape drive to connect to the next device in the chain. Make sure that
the last device in the chain is terminated with an LVD multimode terminator.
See also Table 2, "supported SCSI bus types," on page 11.
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