When more than one hard drive is installed on a computer
system, each drive competes for control of the computer. To allow both drives to work in harmony on the same computer system, the controlling (or startup) drive is designated the master drive and the other drive is designated the slave drive. You can change this designation. The following procedure applies to any PC-compatible computer.
Difficulty: Moderately Challenging
Things You’ll Need:
Decide which hard drive will be the startup (master) drive. If this drive was the startup drive previously, or if it's a new hard drive, then the master drive designation will already be set.
Step 2To change the designation of a new drive to be a slave drive, skip to step 4.
Step 3To change the designation of an existing drive to be a slave drive: Turn off the computer, unplug the power cord, remove the drive from its drive bay, and disconnect the drive from its power cord and ribbon cable.
Check the hard drive documentation or the label on the drive itself for master/slave jumper settings.
Step 5Find the jumpers on the circuit board
of the drive. Jumpers are plastic plugs with metal sleeves that form a circuit between a pair of pins. Jumper locations are labeled on the board with a J followed by a number (such as J20).
Step 6Use tweezers or very small pliers to remove or reposition the jumpers to the configuration shown in the documentation or on the disk label.
Step 7Install (or reinstall) the hard drive in the computer. (See "How to Install a Second Hard Drive.")
Set to label on your hard drive. Different on every drive.