Hello,
this reached my mail address only, and I suppose it was meant for the
list...
Arno
On 3/10/2006 1:13 AM, Christopher Mills wrote:
I see this as a fundemental issue with file storage. With tape, you have
a selection of separate media that various "versions" of backed-up files
end up residing on. With file storage you have to make the concious
decision to design backups that reside on physically different media.
Its easy to end up just backing everything up to one physical disk. I am
designing a system of "mirrored" backups with Bacula where each host
being backed up is backed up using identical jobs except for using two
independent file storage devices on two independent storage daemons. I
believe in a backup rule of threes. Important data should always be
copied in at least three places: normally the original and two
independent backups. As an example, if you are going to rebuild the
machine the original data is on, then make a third copy before your
reformat the hard drive. It is only in unexpected crisis that there
should ever be less than three copies. I came to this rule after having
seen backups fail in crisis a couple of times. Regular recovery tests
from backups are also important.
This doesn't help you now, I know. Sorry about that (I am new to Bacula
so I probably can't help you through this.). Don't mean to throw salt on
the wound.
Arno Lehmann wrote:
Hello,
On 3/9/2006 10:59 AM, Joerg Staedele / Computer Plus GmbH wrote:
Dear list,
i'm getting grey hair from debugging a strange problem with bacula.
I do have lots of grey hair, but still I feel with you :-)
...
I ran a bscan on all Volumes ... Vol1 was OK, Vol2 was OK, Vol3 was OK,
Vol4 is broken ->
bscan: butil.c:266 Using device: "FileStorage" for reading.
09-Mär 10:42 bscan: Ready to read from volume "Harddisk4" on device
"FileStorage" (/home/bacula).
bscan: bscan.c:469 VOL_LABEL: OK for Volume: Harddisk4
bscan: bscan.c:563 Could not find SessId=59 SessTime=1140960629 for EOS
record.
bscan: bscan.c:477 70643 "errors" ignored before first Start of Session
record.
09-Mär 10:49 bscan: bscan Error: block.c:305 Volume data error at
4:1731764368!
Block checksum mismatch in block=62155 len=64512: calc=c9f38ba6
blk=9607b9cb
That looks bad, I'd guess it's something serious. Might be a disk
error, file system corruption, or something like that.
Have you had a look into the system log to see if the OS notices lower
level errors than Bacula reports?
Apart from that, unfortunately I don't have advice how to restore from
the broken files.
I'd suggest checking the disks with a tool like badblocks,
smartmontools, or the manufacturers test program.
Records would have been added or updated in the catalog:
1 Media
1 Pool
91 Job
875106 File
Vol5 was OK again but Vol6 is broken too ->
...
I really dont know where this problems come from. All i want is a
As stated above, I'd assume hardware problem.
working backup for our servers :(
Well, we all do, I think :-)
Some more advice, though also no real help in recovering the files you
need - copy all the volume files to another disk, and think about
doing this on a regular basis if you want to use disks as storage media.
Hopefully someone can help me with that issue...
Not me, not really...
Arno
Regards,
Joerg
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