IBM 8685 xSeries 255 Installation Manual page 38

Reset button: Press this button to reset the server and run the power-on self-test
(POST).
ACT (activity) LED: This green LED is on when there is activity on the server.
INFO (system information) LED: When this amber LED is on, the server power
supplies are nonredundant, or some other noncritical event has occurred. The event
is recorded in the Error log. Check the Light Path Diagnostics panel for more
detailed information.
FAULT (system-error) LED: This amber LED is on when a system error occurs. An
LED on the Light Path Diagnostics panel will also be on to further isolate the error.
Hard disk drive activity LED: Each hot-swap drive has a hard disk drive activity
LED. When this green LED is flashing, the drive is being accessed.
Hard disk drive status LED: Each hot-swap drive has a hard disk drive status
LED. When this amber LED is on continuously, the drive has failed. If an optional
SCSI or RAID adapter is installed in the server, when the LED flashes slowly (one
flash per second), the drive is being rebuilt. When the LED flashes rapidly (three
flashes per second), the controller is identifying the drive.
Diskette drive activity LED: When this LED is on, it indicates that the diskette
drive is in use.
Diskette-eject button: Press this button to release a diskette from the drive.
CD-ROM drive activity LED: When this LED is on, it indicates that the CD-ROM
drive is in use.
CD-eject button: Press this button to release a CD from the drive.
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IBM xSeries 255 Type 8685: Installation Guide