ASUS CDRW 52X32X52 RETAIL BLACK CRW-5232AS/BLACK/QUIET 사용자 설명서

Set the jumpers to configure the drive as either master or slave mode before
installing it into the computer chassis. Refer to next page for an explanation of each
drive mode. Select your desired mode by placing the jumper cap over the pins.

Put the jumper caps properly over the pins to avoid damage to the drive.