LiteOn LH-18A1P Manual page 12

Configuration (B)
Current configuration:
Hard disk connected as Master device and CD-ROM or DVD-ROM connected as Slave
on the primary IDE port; nothing connected to the secondary IDE port.
Simplest setting instructions (B-1):
Set the DVD writer's jumper to Master and connect the DVD writer to the Secondary
IDE port.
Recommended setting instructions (B-2) – (for performance reasons, we do not recommend
having an optical drive on the same IDE channel as a hard disk drive):
Disconnect the CD-ROM or DVD-ROM from the primary IDE port, keep the jumper as
Slave, and re-connect it to the secondary IDE port. Set the DVD writer's jumper to
Master, and connect the DVD writer to the Secondary IDE port.
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