Installation guide

DC Power

Connector

Pin

1P

2P

3P

Power

+12V

+12V ret

+ 5V ret

+ 5V

1P2P3P4P

68 Pin SCSI I/O

Connector

J1-Auxiliary

18 Hawk 4 (Wide) Family Install Guide, Rev. A

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Figure 1. DC power connection, 68 pin SCSI I/O

connector

ST15230WC and ST15230DC model drives receive

power from the host computer through the 80 pin

combined SCSI I/O and power connector (not shown,

since a separate DC power cable not required). No

separate DC power connector is provided on the drive.

SCSI address selection

On "W" and "WD" model drives, make sure that the

SCSI bus address jumper plugs are properly set for the

bus address assigned to the drive. In some systems, a

cable plugs into either J6 or J1auxiliary, so drive ID can

be set at some remote location. See Figures 3a and 3b

showing the bus address select header and the jumper

configurations that select addresses 0 through 15. ID 7

has the highest priority during bus arbitration on (both

8 and 16 device systems). Bus arbitration priority

decreases to ID 0, then ID 15 down to ID 8. ID 8 is the

very lowest priority. Typically the primary boot device is

set to ID 0 the host is ID 7, and the subsequent SCSI

drives are jumpered as appropriate for the particular

system involved.