IBM 71P7285 manual Setting the configuration jumpers

Step 3. Setting the configuration jumpers

You can configure your drive as master «1¬, slave «2¬, or cable-select «3¬, as shown.

Use the following guidelines to determine the correct configuration for your DVD-ROM drive.

vConfigure the DVD-ROM drive as a master if it will be the only device that is connected to an IDE cable. This is the preset configuration.

vConfigure the DVD-ROM drive as a slave if it will be the second device on an IDE cable. Be sure to configure the other device as a master. In some cases, a hard disk drive might require a ªmaster with slave presentº jumper setting when another device on the same cable is configured as a slave. For more information on setting configuration jumpers on other devices, refer to the documentation that comes with your computer device.

vSome non-IBM computers use special ATA cables with two wires reversed in the device connectors so that the drives can be configured by the cable instead of by jumper position. Use the cable-select position only for computers that are equipped with these special cables. See the documentation that comes with your computer to determine if your ATA adapter requires that you place the jumpers in the cable-select position.

If you place the jumpers in the cable-select position, the IDE cable automatically assigns the master and slave settings based on the position of the drive on the cable. You must use the cable-select setting for this cabling system whether the DVD-ROM drive is the only device or the second device connected to the cable. The drive closest to the IDE controller is automatically the master drive. Any other devices on the IDE cable must also be set to cable-select.

Installation and user's guide 1-5