IBM System x3200 Problem Determination And Service Manual page 23

CD-eject or DVD-eject button
Press this button to release a CD from the CD drive or a DVD from the
DVD drive.
CD or DVD drive activity LED
When this LED is lit, it indicates that the CD drive or DVD drive is in use.
(Optional) External diskette-eject button
Press this button to release a diskette from the diskette drive.
(Optional) External diskette drive activity LED
When this LED is lit, it indicates that the diskette drive is in use.
Hot-swap hard disk drive activity LED (some models)
On some server models, each hot-swap drive has a hard disk drive activity
LED. When this green LED is flashing, it indicates that the associated hard
disk drive is in use.
When the drive is removed, this LED also is visible on the hard disk drive
backplane, next to the drive connector. The backplane is the printed circuit
board behind drive bays 4 through 7.
Hot-swap hard disk drive status LED (some models)
On some server models, each hot-swap hard disk drive has an amber
status LED. If this amber status LED for a drive is lit, it indicates that the
associated hard disk drive has failed.
If an optional ServeRAID adapter is installed in the server and the LED
flashes slowly (one flash per second), the drive is being rebuilt. If the LED
flashes rapidly (three flashes per second), the adapter is identifying the
drive.
When the drive is removed, this LED also is visible on the hard disk drive
backplane, below the hot-swap hard disk drive activity LED.
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Chapter 1. Introduction