ST12450W/WD Installation Guide, Rev. B | 25 |
Synchronizing spindles
in multiple drive configurations
If you are installing two or more Barracuda drives, you may (optionally) want to synchronize their spindles to reduce the latency associated with switching from one drive to another.
Spindle sync cables are used to connect the drives.
Use pins 11 and 12 on the J5 connector to attach the spindle sync cable. Pin 11 provides the reference index signal (REFSIG+) and pin 12 provides ground (GND). See Figure 7.
SCSI I/O |
| DC Power | |
Connector | Pin 1 | ||
Connector | |||
| J5 | ||
|
| ||
Spindle Sync Cable Connector (SSC) | SSC | ||
| |||
These pins are used to connect a | J5 | ||
spindle sync cable. |
|
| |
Spindle sync reference index signal (REFSIG+).
Ground (GND).