Hya,
Is this drive the only one in the lib ?
If not, you might have inverted the logical and physical configuration. Means the position of the drive, or robot drive number.
To test this, use robtest :
robtest, chose you lib (number 0 ?), validate :
? => help menu
s s => shows the slots status
find a slot with a tape
s d => shows the drive status
m sX dY => move from slot X to drive Y
This is a move based on YOUR configuration
unload dY => sould return a READY message if your configuration is OK.
if you get an error from the unload Y, try to unload another drive. Then you'll be able to move back the tape by m dY sX.
This is a good way to see if you're correct in ur config.
The unload command is a direct scsi order to the /dev/rmt/ (or Tape if Windows) device
So if you have an error, you know you have to reconfigure your drive, to specify it's correct robot drive number.
Kerk