one more disk may be in one of the drives since there
is a spare cover,
but I'm not sure
There may be disks in the drives, but the spare cover shouldn't come from
one of them. When you load a disk into an RL, you put the cover,
upside-down,, on top of the disk pack. If you don't, the cover interlock
switch doesn't operate when you close the drive, so it won't spin up, etc.
-tony