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Barracuda 2LP Installation Guide, Rev. E
Terminator power
There are four possible terminator power configurations
for ST31250N and ST32550N drives (see Figure 7). You
will not normally need to change this option and can leave
the drive configured as it was shipped from the factory.
ST31250ND and ST32550ND drives should be config-
ured with a jumper connecting J1 pins 1 and 3 (and no
jumper on J1 pins 2 and 4) as illustrated in Figure 7.
Figure 7. Setting terminator power jumpers
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ST31250N and ST32550N
J1 Connector
Pin 6
Pin 1
ST31250ND and
ST32550ND
J1 Connector
Pin 1
Pin 2
J1
ST31250N and ST32550N
Pin 6
Term. power from drive (default)
Term. power to SCSI bus
Term. power from SCSI bus
Term. power to SCSI bus
and drive
J1
ST31250ND and ST32550ND
Term. power to SCSI bus (default)
35
N/ND drives
Pin 1
Pin 2
Pin 1
Pin 2
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