This section discusses the types and functions of each LED on the front of the disk shelf.
The disk shelf LEDs are displayed on the front side of the disk shelf, as shown in the following illustration.
LED
|
State
|
Indicates...
|
|---|
AC--Normal indicator
|
On (green)
|
Power supply is functioning properly.
|
Off
|
Power supply failure or nonpowered up condition.
|
DC--Normal indicator
|
On (green)
|
Power supply is correctly converting AC input into the DC voltages that the disk shelf and disks require.
|
Off
|
Power supply failure or nonpowered up condition.
|
System status
|
On (blue)
|
Communication failure between the storage engine and the disk shelf.
|
Off
|
Disk shelf is connected and is communicating with the storage engine.
|
Power
|
On (yellow)
|
Disk shelf is powered on.
|
Off
|
Disk shelf is powered off.
|
Drive status
|
On (green)
|
Disk shelf drives are operating normally.
|
Off
|
One or more drives in the disk shelf are experiencing failure. Check the Drive status light on each disk drive to determine which disk drive failed.
|
Drive activity light
|
On (green)
|
Disk drive is active. The light flashes in response to activity while the drive is being accessed.
|
Off
|
Disk drive is idle.
|
Drive status light
|
On (yellow)
|
Disk drive failure.
|
Off
|
Normal operation.
|
