Loosing drive in IBM3583

Environment: Server W2K SP2, TSM version 4.2.1.7.

This is what I get in the activitylog:

        2002-05-01            8302     ANR8302E I/O error on drive LB6DR0

   12:00:24.000000                      (\\.\TAPE0) (OP=READ, Error
Number=1235,   
                                        CC=0, KEY=2B, ASC=4B, ASCQ=00,

 
SENSE=F0.00.2B.00.00.80.00.1C.00.00.00.00.-
 
4B.00.00.00.00.00.00.00.00.00.00.00.00.00.-
 
00.00.00.2A.00.00.96.6F.00.00.00.00.00.00.-
                                        00.00.00.00.00.00

        2002-05-01            8302     ANR8302E I/O error on drive LB6DR1

   12:00:24.000000                      (\\.\TAPE1) (OP=WRITE, Error
Number=1117,  
                                        CC=0, KEY=04, ASC=44, ASCQ=00,

 
SENSE=F0.00.04.00.00.80.00.1C.00.00.00.00.-
 
44.00.00.00.00.00.00.00.00.02.00.00.00.00.-
 
00.00.00.13.00.00.EF.70.01.00.00.00.00.00.-
                                        00.00.00.00.00.0

        2002-05-01            1227     ANR1227E BACKUP STGPOOL: Process 65

   12:03:02.000000                      terminated - internal server error

                                        detected.

This is what I get when I query the drives:

Library Name     Drive Name       Device Type     On-Line            
------------            ------------    -----------
-------------------
-------------------
LB6                     LB6DR0           LTO                 Yes
LB6                     LB6DR0           LTO                 Yes

LB6                     LB6DR1           LTO                 Unavailable
Since  2002.04.17 12:00:24

This is what I get in the eventlogg on the server:

The driver detected a controller error on \Device\Tape1. 


After I have restarted the server everything works alright for one week
until the next wednesday at 12:00. I don´t have any schedules starting at
this time in TSM or on the server. It´s not the same drive that gets
unavailable every time. Any one who has a clue whats wrong?

Thanks in advance.

/Larsa


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