Barracuda 4LP Installation Guide, Rev. B 39

N drives
Other applicable jumper options

Several other jumper options are available as illustrated.

Figure 10. Additional jumper options

Enable parity check of 
SCSI bus.
Disable parity check.
J2 Pin 1
Reserved
Parity Check option
Write protect = Off 
(enables writing).
Write protect = On 
(disables writing).
Write Protect option
Disable the Delay Motor 
Start option.
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. 
The drive starts 
according to the 
Delay Motor Start option.
Motor Start option
Pin 1
End
SCSI I/O
Connector
Drive with
HDA up, PCB
down, viewed
from front
Pin 1
DC Power
Connector
J2
Drive Front J6
J1
Pin 1
HDA
J6
A2A1A0
Reserved
Remote
LED
L
E
D
R
E
S
R
E
S
Reserved
Shipped with cover installed.
Do not remove.
Do not install jumpers
on these four positions.
J6
Jumper Type
(enlarged to
show detail)
CATH
11
12
J2 Jumper Type
(enlarged to
show detail)
(default)
(default)
(default)
(default)