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Barracuda 18 Installation Guide, Rev. C
Terminating the drive
"W" model drives are terminated with permanently mounted IC
active terminators. If you install one of these drives and it is not
on the end of the SCSI bus, disable the terminators by removing
the jumper "TE" from pins 15 and 16 of connector J2. If you
install the drive on the end of the SCSI bus, enable termination
by installing a jumper on pins 15 and 16 of connector J2 (see
Figure 13).
Note. Use active (ANSI SCSI-2 Alternative 2) terminators when
terminating the bus.
"WD" and "LW" model drives do not have internal terminators or
any other way of adding internal termination to the drive. You
must provide external differential termination to these drives
when termination is required.
*Enable SCSI terminator
*Disable SCSI terminator
*"W" model only
[1] The "TE" jumper is not applicable to "WD" and "LW" drives.
Figure 13. Terminating the drive ("W" model shown)
J6
Drive
Front
J2 Jumper Plug
(enlarged to
show detail)
J2
R
T
D
M
W
P
E
T
[1]
E
S
E
P
D
S
P
J2
W drives
Pin 1
T
P
(default)
47
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