>>>>> "AL" == Arno Lehmann <[EMAIL PROTECTED]> writes:

[Arno: sorry...  you're going to get multiple copies of this as I messed
up my from address that the list expects me to use]

[This message is actually about an old thread I started a while back
regarding DVDs not being written properly, probably due to small writes;
Arno Lehmann kindly responded with good advice]

WH> I have it working with DVDs and the situation in question as I can
WH> tell went like this:
WH> - it was backing up the main system.
WH> - I believe it tried to store the information in: BaculaDVD0009.8.
WH> - However, the disc doesn't actually contain that part, but the log
WH> shows success:
WH> 
WH> 12-Jun 23:05 machine-sd: Ready to append to end of Volume "BaculaDVD0009" 
part=8 size=3040970041
WH> 12-Jun 23:05 machine-sd: Job write elapsed time = 00:00:04, Transfer rate = 
57.92 K bytes/second
WH> 12-Jun 23:05 machine-sd: Part 8 (233000 bytes) written to DVD.

AL> It might be that the part file in question still is in your temporary 
AL> storage directory. Do you have "Write Part After Job" set in the job 
AL> definition?

I have, in the end implemented Arno's solution which is to set Write
Part After Job on only the catalog backup that gets executed after
everything else.

However, in all of this I had 2 disks (out of 11) that failed in the way
indicated: bacula says to mount the disk but it indeed was mounted but
bacula didn't know that because the last part was missing from the
disk.  (I "fixed" these by marking them as Full, and bacula then
proceeded to desire a new volume).

So my remaining questions are that I can't find documentation for:

1) is the disk with the missing part actually missing data (I assume
   so)?

2) is the part that was supposed to be written to an older volume (say
   #8 in a pool) but couldn't be written to the new next volume (#9)
   instead or is that part "lost" as well?

3) How do I verify that the contents of a DVD match what bacula expects
   there to be on the disk.  I haven't seen a archive verification
   option anywhere?

4) assuming that some of the archives are bad, what's the best way to
   fix the issue?  Can I mark the volume as "Error" and will bacula
   automatically re-archive the files that were in that volume again on
   the next run through the various backup schedules?  (the brunt of the
   question is really: do files get re-backed up automatically when a
   volume is marked in error, or does something else need to be done).

5) Should I give up and buy a tape drive (ha ha; sigh)
-- 
"In the bathtub of history the truth is harder to hold than the soap,
 and much more difficult to find."  -- Terry Pratchett

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