Seagate BARRACUDA ATA FAMILY ST320430A - Manual (Page 8)

4 Barracuda ATA Family Installation Guide, Rev. A
Master/slave jumpers
If you already have one hard drive in your computer and you are
installing a second drive, you must configure one drive as a mas-
ter and the other as a slave.
Note. If you need to change the jumpers on your existing hard
drive, see the Disk Manager online manual, look on the
drive label, or contact the drive manufacturer.
Installing a master or one drive only:
• The drive is shipped configured for a master or single-drive
installation with a jumper set on pins 7 and 8.
Note. The master drive usually defaults to being the “boot” drive
(drive C), from which the computer loads system soft-
ware when it first starts up.
Installing a slave drive:
• If you are installing your drive as the second drive on the
cable, remove all the jumpers.