Green
Amber
Description
On
Off
Drive tray is powered on, the hard disk drive is inactive,
and the drive should not be removed.
Blinking
Off
The hard disk drive is inactive.
The hot-swap drive can be removed safely.
On
On or Blinking
The hard disk drive is in use, and should
not be removed.
Off
Off
The drive is defective, or no power is being supplied to the drive.
The hot-swap drive can be removed safely.
Please see the LEGAL - Trademark notice.
Feel free - send a 
for any BUG on this page found - Thank you.