Seagate HAWK 2LP ST31231N Installation Manual page 20

18 Hawk 2LP Family Installation Guide, Rev. A
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DC Power connection
The drives receive DC power through a 4 pin connector
mounted on the PCB next to the SCSI I/O connector. See figure
below.
50 Pin
SCSI I/O DC Power
Connector Connector
4 3
Figure 1. DC power connection, 50 pin SCSI I/O
connector
SCSI address selection
Make sure that the SCSI bus address jumper(s) are properly
set for the bus address assigned to the drive. See figures 3a
and 3b showing the bus address select header and the jumper
configurations that select addresses 0 through 7. Typically
the primary boot device is set to ID 0, and the subsequent SCSI
drives are jumpered in ascending order. Bus addresses 0
through 6 should be used (the host adapter usually uses
address 7). If the drive LED shows no on/off activity when the
host is trying to communicate with it, an incorrect bus address
selection at the drive should be suspected.
Pin Power
1 +12V
2 +12V RET
3 + 5V RET
2 1
4 + 5V