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A-12 Scorpion 240 Autoloader Installation Manual
SCSI Address Selection (pins 1 through 8)
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 used by the
drive by placing the appropriate jumpers on pins pairs 1-2
through 7-8, as shown in Figure 1.
Note: SCSI ID numbers 8 through 15 will only be recognized
if dip switch 9 is “ON.” See page A-14 for details.
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.
Note: The internal Scorpion 240 does
not
provide SCSI
termination, and therefore should not be installed as
the last device in a SCSI chain. See “SCSI termination”
on page A-16 for more information.
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
To change data compression, MRS checking, power-on self-
test diagnostics, operating system settings, Wide/Narrow
SCSI selection, or the drive’s inquiry string, you must use the
dip switches on the underside of the internal drive.