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Cheetah 9 Installation Guide, Rev. B 47
W/WD drives
Other applicable jumper options
Other option jumpers are available as illustrated below.
Figure 15. Additional jumper options
T
E
D
S
M
E
W
P
P
D
R
E
S
T
P
2
T
P
1
J2
SCSI I/O
Connector
DC Power
Connector
J2
Pin 1
Drive
Front
J6
J1
Pin 1
Pin 2
J2 Jumper
(enlarged to
show detail)
Enable parity check of SCSI bus (default).
Disable parity check.
Reserved
Parity Check option
Write protect = Off (enables writing – default).
Write protect = On (disables writing).
Write Protect option
Disable the Delay Motor Start option (default).
Motor start delay equal to the SCSI ID multiplied by 12 seconds.
For example, if the SCSI ID = 2, the drive starts in 24 seconds.
Delay Motor Start option
(valid only if the Enable Motor Start jumper is not connected)
Enable motor start. The drive waits for the Start Unit command
from the host before starting the spindle motor.
Disable motor start (default). The drive starts according to the
Delay Motor Start option.
Motor Start option