Installation guide

Barracuda 4XL Installation Guide, Rev. B 45
W/WD drives
Terminator power
There are three possible terminator power (TP) configurations
for “W” model drives (see Figure 14). You will not normally need
to change this option and can leave the drive configured as it
was shipped from the factory.
There are two possible terminator power (TP) configurations for
“WD” model drives (see Figure 14).
Figure 14. Setting terminator power jumpers
Term. Power to SCSI Bus
Term. Power from Drive (default)
“W” model drives

T
E

D
S

M
E

W
P

P
D
R
E
S

T
P

T
P
Host adapter or other device provides 
term. power to external terminator.
Term. Power to SCSI Bus (default)
“WD” model drives
Term. Power from SCSI Bus
Position A
SCSI I/O
Connector
DC Power
Connector
J2
Drive
Front
J6
J1
J2 Jumper Type
(enlarged to
show detail)
Pin 1
J2