I invariably get errors of the following kind when I try to append to a 
previously written tape following a reboot:-
31-May 23:48 bacula-dir JobId 234: Start Backup JobId 234, 
Job=BackupHomeDir.2010-05-31_23.48.54_04
31-May 23:48 bacula-dir JobId 234: Using Device "SLR7"
31-May 23:49 bacula-sd JobId 234: Volume "Week3-Tape001" previously 
written, moving to end of data.
31-May 23:52 bacula-sd JobId 234: Error: Unable to position to end 
of data on device "SLR7" (/dev/nst0): ERR=dev.c:1
396 ioctl MTFSF error on "SLR7" (/dev/nst0). ERR=Input/output error.

31-May 23:52 bacula-sd JobId 234: Marking Volume "Week3-Tape001" in 
Error in Catalog.
31-May 23:56 bacula-sd JobId 234: Job 
BackupHomeDir.2010-05-31_23.48.54_04 waiting. Cannot find any appendable volum
es.
I can write to a newly initialised tape without problem, and can append so long 
as the PC is not rebooted - even after stopping & restarting Bacula.  Tapes are 
new, the btape test program runs 100% successfully and I can read from the 
tapes even after they are in error.

Tape device is Tandberg SLR7.  Driver options (set using mt) are: buffer-writes 
async-writes read-ahead two-fms can-bsr.  Device settings in bacula-sd.conf are:
   Block Positioning = no
   Hardware End of Medium = No # defaut is Yes
   Backward Space Record = no
   Backward Space File = no
   Fast Forward Space File = No # This line required if above HEOM is 
set to "No"
   BSF at EOM = Yes # Default is no
   Two EOF = Yes #  Minimum Block Size = 512


My backup schedule is weekly full, followed by nightly incremental.  Bacula 
version is 3.0.3.  OS is Fedora 12 (kernel 2.6.32.12-115.fc12.x86_64).

I have seen numerous postings about this on this forum & elsewhere - one post 
here had recommended settings which seemed to fix the problem for a few days 
before it resumed.  I have tried numerous combinations of driver and Bacula 
settings but always get this error (or a similar one with "MTEOF").  It seems 
the tape is either writing a marker it shouldn't, or *not* writing something it 
should, when the system is rebooted.  How do I correct the tape drive behaviour 
and/or configure Bacula to handle it?

Any ideas gratefully received.

Andrew

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