HP surestore t20e, Руководство пользователя

Страница: 17 / 80

Preparing for Installation
Planning the SCSI Bus
1-9
Planning the SCSI Bus
The SCSI controller in your computer links the computer to your tape drive
and possibly other devices through the SCSI bus. If you have other SCSI
devices in addition to the tape drive, you need to decide where the tape
drive will go in relation to the other devices. If the tape drive is going to be
the only device on the bus, there is no decision to make: you can use the
drive’s defaults.
Each device on a SCSI bus, including the SCSI controller itself, must have
a unique address, a number from 0 to 7, called the SCSI ID or target ID.
SCSI ID 7 is reserved for the SCSI controller because it has the highest
priority on the bus. A SCSI boot disk usually has a SCSI ID of 0. The tape
drive should be assigned an unused SCSI ID between 1 and 6. The tape
drive’s default is 4. To configure the drive properly when you install it, you
will need to identify the SCSI IDs of any other devices on the SCSI bus to
be sure that there is no conflict with the tape drive’s SCSI ID.
SCSI buses must be terminated correctly at each physical end of the cable.
Both internal and external T20 drives use active termination. An internal
HP SureStore T20 tape drive comes with a jumper that can be removed if
the tape drive is not at the end of the SCSI chain. The external T20
automatically determines if it is at the end of the SCSI chain and terminates
itself if necessary. No user intervention is necessary.
If you need more information about arranging your SCSI bus, refer to our
World Wide Web site (
http://www.hp.com/tape
) or the HP First
Faxback service (see the telephone numbers listed in Appendix B).
Checking Your Current SCSI Configuration
The TapeAssure software provided on the HP SureStore Tape CD can be
used to check your computer’s current SCSI configuration. If you are not
sure what this configuration is, install and run TapeAssure from the CD.
This will check for the presence of a SCSI controller and its driver software
and identify the SCSI IDs of existing SCSI devices. Exit the program after
you view the SCSI configuration information.