Seagate ST3285N, Product Manual

Page: 33 / 151

2.9.2 Start/stop option
When a jumper is installed on pins 3 and 4 of the options jumper block,
the drive waits for a Start/Stop Unit command from the host before
starting or stopping the spindle motor.
2.9.3 SCSI address
Each device on the SCSI bus must have a unique SCSI ID. SCSI ID 7 is
usually reserved for the SCSI host adapter. If you install only one drive,
use SCSI ID 3 (the default). If you install a second drive, you can use
any available ID. SCSI ID 2 is recommended.
When selecting the SCSI ID, you can install jumpers on either (not both)
of the following jumper blocks:
•
The SCSI ID jumper block
•
The user-configuration jumper block (pins 1–6 only)
Note. If you install SCSI ID jumpers on both the SCSI ID jumper block
and the user-configuration jumper block (pins 1–6), the drive may
not function properly.
2.9.4 Terminator power source jumper block
To select the termination power source, install jumpers as follows:
•
To provide terminator power to the SCSI connector and the drive
terminator packs, install jumpers on pins 1 and 2 and pins 3 and 4 of
the terminator power source jumper block. This is the default.
•
To select the drive power connector as the termination power source
for the resistor packs, install a jumper on pins 1 and 3 of the terminator
power source jumper block.
•
To select the SCSI connector as the termination power source for the
resistor packs, install a jumper on pins 1 and 2 of the terminator power
source jumper block.
•
To provide terminator power to the SCSI connector from the drive
power connector only, install a jumper on pins 3 and 4 of the terminator
power source jumper block.
ST3655 Family SCSI Drives Product Manual, Rev. A 23