Yamaha CRW8824SX Series Owner's Manual page 28

Setting Up The CRW8824SX Drive
4 Power up your CRW8824SX drive first, then your computer.
Power ON
Always power up the devices in your SCSI chain before powering up
your computer. This will ensure that they are recognized by the
computer's operating system.
Do not disconnect any devices in your SCSI chain while the computer is
on.
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