Dell Enterprise HDD : What is the meaning of LED on Physical Drives (PD) ?

Riepilogo: Explanation of the backplane LED indicators.

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Note: This article is part of the Server Tutorials: "Raid and Disks" available here .

On hotswap drives, the backplane provides two LED indicators per drive that transmit light to the top of their respective caddies.

The light on the left is managed by the drive itself and indicates activity on the drive.
The indicator on the right is controller by the backplane in conjunction with the storage controller and is used to indicate drive status.

This article explains the differents states possible of the physical drive:

1 . physical disk activity indicator
2 . physical disk status indicator
4 . physical disk eject button

Drive-status indicator pattern (RAID only)	Condition
Blinks green two times per second	Identifying drive or preparing for removal.
Blinks green, amber, and turns off	Predicted drive failure
Blinks amber four times per second	Drive failed
Blinks green slowly	Drive rebuilding
Steady green	Drive online
Blinks green three seconds, amber three seconds, and turns off six seconds	Rebuild aborted
Off	Ready for insertion/removal or not detected

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