Seagate BARRACUDA 2LP ST31250W/WD/WC/DC - Manual (Page 38)

36 Barracuda 2LP Installation Guide, Rev. E
N/ND drives
Synchronizing spindles
Use pins 5 and 6 on the J4 connector to attach the spindle
sync cable. See Figure 8.
Figure 8. Spindle sync connectors
J2
J4
Spindle sync
cable connector
J4
Pin 1
Pin 1
Spindle Sync Reference
Spindle Sync Ground
(front view of J4)
Pin 2
Pin 1