Am Donnerstag, 13. Oktober 2005 08:50 schrieb Julien Cigar:
> Hello,
>
> sometimes I have "write error" messages during my full backup (on tapes) :
>
> 12-Oct 18:44 phoenix-sd: BebifFullBackup.2005-10-12_06.00.00 Error:
> block.c:552 Write error at 15:111 on device /dev/st0. ERR=Input/output
> error.
> 12-Oct 18:44 phoenix-sd: BebifFullBackup.2005-10-12_06.00.00 Error:
> Error writing final EOF to tape. This tape may not be readable.
> dev.c:1213 ioctl MTWEOF error on /dev/st0. ERR=Input/output error.

You should have a look in your /var/log/messages (supposing it is linux you
are using). Troubles on the scsi-bus get logged there (at least on my system).
This should do the trick:
# grep st0 /var/log/messages

These are the normal log entries, when bacula starts to write to tape.
---------------------------------
Oct 14 03:26:35 epistaxis kernel: st0: Mode 0 options: buffer writes: 1, async 
writes: 1, read ahead: 1
Oct 14 03:26:35 epistaxis kernel: st0:    can bsr: 0, two FMs: 0, fast mteom: 
0, auto lock: 0,
Oct 14 03:26:35 epistaxis kernel: st0:    defs for wr: 0, no block limits: 0, 
partitions: 0, s2 log: 0
Oct 14 03:26:35 epistaxis kernel: st0:    sysv: 0 nowait: 0
---------------------------------

These are error entries. If you find something similar you should have a look 
in the messages and
see what else happens around that time.
(This is the unit showing a hardware error, getting really confused and finally 
blowing its power
supply sometime later)
---------------------------------
Oct  7 12:38:06 epistaxis kernel: st0: Error with sense data: Current st09:00: 
sense key Hardware Error
Oct  7 12:38:07 epistaxis kernel: st0: Error with sense data: Current st09:00: 
sense key Hardware Error
Oct  7 12:38:07 epistaxis kernel: st0: Error with sense data: Current st09:00: 
sense key Medium Error
Oct  7 12:38:12 epistaxis kernel: st0: Error with sense data: Current st09:00: 
sense key Not Ready
---------------------------------

Also a look into the kernel message ring buffer might help. Use the command 
'dmesg' for that.
But as it is a ring buffer it gets overwritten after some time.

CU Sven


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