Seagate BARRACUDA 2LP ST31250W/WD/WC/DC - Manual (Page 43)

Barracuda 2LP Installation Guide, Rev. E 41
W/WD drives
Synchronizing spindles
Use pins 11 and 12 on the J5 connector to attach the
spindle sync cable. See Figure 13.
DC Power
Connector
SCSI I/O
Connector
J5
4P 3P 2P 1P
Pin 1 Pin 1
SS
J5
Spindle sync
cable connector Spindle Sync Reference
Spindle Sync Ground
Figure 13. Spindle sync connectors