What do the various HP LTO Ultrium LEDs mean?

Version 1

    Solution: If the drive is sitting flat, not on its side (Neo), all LEDs are on the right side of the drive.

    Below the Unload button are four sets of LEDs. The following descriptions begin at the top and move downward.

    -- First LED GREEN = Power On/Activity (Steady, ready for use) (Flashing, activity read/write) (Off, drive is off or drive failed Post).
    -- Second LED AMBER = Drive Error (The drive suffered an unrecoverable hardware error)
    -- Third LED AMBER = Tape Error (Tape in the drive is faulty)
    -- Fourth LED AMBER = Cleaning Required (Flashing, LTO Cleaning tape is needed to clear the light)