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48
10.1.2
ST11950W/WD and ST12550W/WD configuration
SCSI I/O
Connector
Pin 1
J5
Figure 18. ST11950W/WD and ST12550W/WD physical interface
Figure 19 illustrates ST11950W/WD and ST12550W/WD SCSI ID and option
select jumper connectors.
J5
Position
SCSI ID = 0
SCSI ID = 1
SCSI ID = 2
SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
SCSI ID = 6
SCSI ID = 7
SCSI ID = 8
SCSI ID = 9
SCSI ID = 10
SCSI ID = 11
SCSI ID = 12
SCSI ID = 13
SCSI ID = 14
SCSI ID = 15
Remote LED Connector
Spindle Sync
SSREF
Cable Connector
J4
Position
7
Enable Drive Terminators*
Reserved
Parity Disable
Enable Motor Start
Delay Motor Start
Write Protect
Figure 19. ST11950W/WD and ST12550W/WD jumper connectors
Barracuda 1 and 2 Product Manual, Rev. C
J01
J4
DC Power
Connector
Pin 1
Connector
6
5
4
3
2
1
J5
Negative
(cathode)
Power
Positive
Connector
(anode)
Pin 1
6
5
4
3
2
1
*
Term. Power from Drive
Term. Power from SCSI Bus
*
Term. Power to SCSI Bus
*
Term. Power to SCSI Bus and Drive
*
Valid for single ended drives only.
SCSI
Pin 1
Pin 1
Pin 1
Pin 1
Pin 1
J4
J01
Pin 3
J01
Pin 1
Pin 2
Position 1
Position 2
Position 1
Position 2
Position 1
Position 2
Position 1
Position 2
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