IBM 8485E2U Installation Manual page 48

USB connectors
CD-eject or DVD-eject button
CD or DVD drive activity LED
(Optional) Diskette-eject button
(Optional) Diskette 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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xSeries 206m Types 8485 and 8490: Installation Guide
Connect USB devices to these connectors.
Press this button to release a CD from the CD drive or a DVD from the
DVD drive.
When this LED is lit, it indicates that the CD drive or DVD drive is in use.
Press this button to release a diskette from the diskette drive.
When this LED is lit, it indicates that the diskette 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 associated hard
disk drive is in use.
When the drive is removed, this LED also is visible on the SAS backplane,
next to the drive connector. The backplane is the printed circuit board
behind drive bays 4 through 7.
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 backplane,
below the hot-swap hard disk drive activity LED.