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ST11950 and ST12550 Installation Guide, Rev. D 29
Enable parity check of SCSI bus data
(default).
J4
PAR
MTR
DMS
Parity Check option (PAR)
Disable parity check.
Enable motor start. This makes the
drive wait for the Start Unit command
from the host before starting the
spindle motor.
Motor Start option (MTR)
Disable motor start (default). This
causes the drive to start according to
the Delay Motor Start option setting as
described below.
Motor start delay equal to the SCSI ID
multiplied by 10 seconds. For example,
if the SCSI ID = 2, the drive will delay for
20 seconds before starting.
Delay Motor Start option (DMS)
(valid only if the Motor Start
jumper is not connected)
Disable the Delay Motor Start option
(default).
SCSI
Connector
DC Power
Connector
J01
J4
Pin 1
Figure 9b. Additional jumper options
for ST11950N/ND and ST12550N/ND drives