Quantum DAT 432/864 Loader Podręcznik Użytkownika Pobierz pdf (Strona 22)

Installing the Autoloaders Installing the Internal Autoloader

Each SCSI device on a SCSI bus must have a unique SCSI ID. The SCSI controller or host adapter

generally uses ID 7. In some systems, the boot drive uses ID 0 or ID 1.

You can select an appropriate SCSI address for the drive by placing the appropriate jumpers on pin

pairs 1-2 through 7-8, as shown in Figure 4 on page 21 .

Parity Checking (pins 9 and 10)

If a jumper is installed on pins 9 and 10, parity checking is enabled. If no jumper is installed, parity

checking is disabled, but parity is still generated by the drive.

Terminator Power (pins 11 and 12)

If a jumper is installed on pins 11 and 12, terminator power is enabled.

If the terminator power jumper is installed, be careful not to short the TERMPWR signal to ground. In

the event of a short, terminator power to the bus will be interrupted. After the short is removed, a

fuse in the drive will automatically reset, restoring terminator power.

Changing DIP Switch Settings

DIP switches on the underside of the internal autoloader let you change the following drive settings

(see Figure 5 on page 23 ):

• Data compression

• MRS checking (DDS-4 autoloader only)

• POST diagnostics

• Operating system settings

• Wide/Narrow SCSI selection

• Inquiry string

NOTE: SCSI ID numbers 8 through 15 will only be recognized if DIP switch 9 is “ON.” See

“SCSI Wide/Narrow (switch 9) - DDS-4 autoloader only” on page 24 for more information.

NOTE: The internal autoloader drive does not provide SCSI termination, and therefore should

not be installed as the last device in a SCSI chain. See ““Installing SCSI Termination” on

page 19 for more information.

NOTE. Power down the drive before changing DIP switch settings. Changes take effect when the

drive restarts.

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Quantum DAT 432/864 Loader Podręcznik Użytkownika Strona 22