Here is a look at what the message is giving me in the actlog when it fails.
It looks just like a plan tape error:

ANR8499I Command accepted.
01/05/02 08:58:03     ANR8300E I/O error on library MAGSTAR (OP=00006C03,

                       CC=314, KEY=05, ASC=3B, ASCQ=0E,
SENSE=70.00.05.00.00.0-

0.00.48.00.00.00.00.3B.0E.FF.02.00.A8.00.00.1E.09.01.00-

.00.00.00.00.00.00.A5.00.00.00.00.00.00.00.00.00.00.00.-

00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-

0.00.00.00.00.00.00.00.00.00.00.00.32.38.37.20.20.20.20-
                       .00., Description=The source slot or drive was empty
in
                       an attempt to move a volume).  Refer to Appendix B in
the
                       'Messages' manual for recommended action.

01/05/02 08:58:03     ANR9999D mmsscsi.c(10695): Could not move volume 1DA7D

                       from slot 31 to slot 16.

01/05/02 08:58:03     ANR8841I Remove volume from slot 31 of library MAGSTAR
at
                       your convenience.


After this the drive then goes offline.  So when the archive runs at 22:30
this is the message it gets:

01/05/02 22:41:20     ANR8447E No drives are currently available in library

                       MAGSTAR.

01/05/02 22:41:21     ANR1404W Scratch volume mount request denied - mount

                       failed.


When i look at the error message in the O/S errpt this is what i see

4865FA9B   0108012102 P H rmt1           TAPE OPERATION ERROR
476B351D   0108012102 P H rmt1           TAPE DRIVE FAILURE
0F78A011   0108011902 T H rmt1           RECOVERY LOGIC INITIATED BY DEVICE

Any ideas???

Bill Wheeler
PDM Administrator
La-Z-Boy Incorporated
(734) 242-1444 x 6170