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48
W/WD drives
Terminator power
There are four 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).
"W" model drives
Term. Power from Drive
Term. Power to SCSI Bus
Drive furnishes power both to its
own terminators and to SCSI bus
Term. Power from SCSI Bus
"WD" model drives
Term. Power to SCSI Bus
Host adapter or other device provides
term. power to external terminator.
Figure 14. Setting terminator power jumpers
Barracuda 18 Installation Guide, Rev. C
Drive
Front
J2 Jumper Plug
(enlarged to
show detail)
J2
T
D
M
E
S
E
Position A
R
E
D
M
S
S
E
J2
J6
Pin 1
R
W
P
E
T
T
P
D
S
P
P
(default)
R
R
W
P
E
E
T
P
D
S
S
P
(default)
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