Seagate BARRACUDA 2LP ST31250W/WD/WC/DC - Manual (Page 22)

20 Barracuda 2LP Installation Guide, Rev. E
*This mounting procedure does not apply to WC or DC
model drives. To mount a WC or DC drive, plug the drive
into the system's single connector attachment (SCA)
position on the system's back panel.
SCSI ID jumpers
Each device on the SCSI chain must have a unique SCSI
ID. The host system’s SCSI controller usually uses the
highest-numbered ID available; therefore the lower-num-
bered SCSI IDs are normally used for the other SCSI
devices such as this Barracuda disc drive.
Note. Most SCSI controllers (host adapters) allow you to
skip a SCSI ID. For example, you can have ID0,
ID1, and ID3 (skipping ID2). Other controllers do
not allow this so be sure to refer to your system or
controller user’s manual for details about its re-
quirements for proper SCSI device installation.
Most Barracuda disc drives are factory set with the SCSI
ID set at 0. To change the SCSI ID, refer to the appropri-
ate drive section for your model.
If, after completing the installation process, the drive’s
LED does not show on/off activity when the host is trying
to communicate with the drive, a duplicate SCSI ID may
be the problem. If this is the case, change the ID so that
each device on the SCSI chain has its own unique ID.