Problem with SLR SCSI tape

[Olivier Nicole]

Hi,

I have had that tape drive and motherboard working hand in hand for
many years without a problem.

Lately it started to give messages like:

on a amlabel command:
Jun 27 13:02:10 amanda /kernel: (sa0:sym1:0:2:0): WRITE FILEMARKS. CDB: 10 0 0 0
 2 0 
Jun 27 13:02:10 amanda /kernel: (sa0:sym1:0:2:0): ILLEGAL REQUEST asc:50,0
Jun 27 13:02:10 amanda /kernel: (sa0:sym1:0:2:0): Write append error
Jun 27 13:02:10 amanda /kernel: (sa0:sym1:0:2:0): failed to write terminating fi
lemark(s)
Jun 27 13:02:10 amanda /kernel: (sa0:sym1:0:2:0): tape is now frozen- use an OFF
LINE, REWIND or MTEOM command to clear this state.


Jun 27 13:03:18 amanda /kernel: (sa0:sym1:0:2:0): ERASE. CDB: 19 1 0 0 0 0 
Jun 27 13:03:18 amanda /kernel: (sa0:sym1:0:2:0): ILLEGAL REQUEST asc:2c,0
Jun 27 13:03:18 amanda /kernel: (sa0:sym1:0:2:0): Command sequence error

on a dd command:
Jun 28 13:48:04 amanda /kernel: (sa0:sym1:0:2:0): extraneous data discarded.
Jun 28 13:48:04 amanda /kernel: (sa0:sym1:0:2:0): COMMAND FAILED (87 0 1).

But at same time I can do a tar without problem, I could write quite
some amount of data during a backup at night...

Error are consistant whatever new or old tape I use in the drive.

Drive is SLR 100 from Tandberg
sa0 at sym1 bus 0 target 2 lun 0
sa0: <TANDBERG SLR100 0402> Removable Sequential Access SCSI-2 device 
sa0: 40.000MB/s transfers (20.000MHz, offset 15, 16bit)

SCSI adapter is Symbios
sym1: <896> port 0xb000-0xb0ff mem 0xf8000000-0xf8001fff,0xf8800000-0xf88003ff irq 10 at device 5.1 on pci1
sym1: Symbios NVRAM, ID 7, Fast-40, LVD, parity checking
sym1: open drain IRQ line driver, using on-chip SRAM
sym1: using LOAD/STORE-based firmware.
sym1: handling phase mismatch from SCRIPTS.

Nothing has been changed in hardware and operating system lately.

Any help or direction for diagnostic is warmly welcome

Bests,

Olivier