If you are installing your first hard disk drive, the jumpers should already be set in the correct positions. If they are, follow the instructions under “Installing a Hard Disk in the Vertical Position,” on page B-8, to install the drive.

If the jumpers are not in the correct positions, you need to change their settings. See “Changing the Jumper Settings,” on page B-6, for instructions.

If you’ll be using two hard disk drives, see “Setting the Jumpers for Two Hard Disk Drives,” below.

Setting the Jumpers for Two Hard Disk Drives

If you install two hard disk drives in your system, you must change the jumper settings on each drive to indicate which drive is the “master” drive and which is the “slave” drive.

A master drive is the drive on which you’ll install the operating system that the computer loads into its memory each time you turn it on. You can run application programs and store data on both the master drive and the slave drive, but the operating system must be contained on the master drive.

The Setup and System diagnostics programs on the Reference diskette recognize your master drive as drive 1 and your slave drive as drive 2. The power-on diagnostics programs refer to your master drive as drive 0 and your slave drive as drive 1. Just remember that the master drive is always the lower number.

Follow the instructions in the next section to change the jumper settings on both of your hard disk drives.

Installing and Removing Disk Drives

B-5