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34
Barracuda 2LP Installation Guide, Rev. E
N/ND drives
Terminating the drive
ST31250N and ST32550N 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 from
pins 5 and 6 of connector J1 (see Figure 6). If you install
the drive on the end of the SCSI bus, enable termination
by installing a jumper on pins 5 and 6 of connector J1.
Note. Use active terminators when terminating the bus.
ST31250ND and ST32550ND drives do not have internal
terminators or any other way of adding internal termina-
tion to the drive. You must provide external active termi-
nation (ANSI SCSI-2 Alternative 2) to these drives when
termination is required.
Figure 6. Terminating the drive
J1
Pin 6
Pin 1
J2
Pin 1
Pin 1
J1
Pin 6
Pin 2
Enable SCSI
terminator (default)
Disable SCSI
terminator
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