IBM x3200 M3 7327 Service Manual page 32

DVD-eject button
DVD drive activity LED
Hot-swap hard disk drive activity LED (some models)
Hot-swap hard disk drive status LED (some models)
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System x3200 M3 Types 7327 and 7328: Problem Determination and Service Guide
Press this button to release a CD or DVD from the DVD drive.
When this LED is lit, it indicates that the DVD drive is in use.
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 drive is in use.
When the drive is removed, this LED also is visible on the SAS/SATA
backplane, next to the drive connector. The backplane is the printed circuit
board behind drive bays 4 through 7 (or bays 4 through 11 on some
2.5-inch hard disk drive SAS 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 SAS/SATA
backplane, below the hot-swap hard disk drive activity LED.