Bacula-users

Re: [Bacula-users] How to verify an old volume

2009-08-25 13:41:01
Subject: Re: [Bacula-users] How to verify an old volume
From: Martin Simmons <martin AT lispworks DOT com>
To: bacula-users AT lists.sourceforge DOT net
Date: Tue, 25 Aug 2009 18:35:52 +0100
>>>>> On Tue, 25 Aug 2009 10:03:43 -0600 (MDT), James L Rogers said:
> 
> Hi,
> 
> I am running Bacula "Version: 3.0.2 (18 July 2009) 
> x86_64-unknown-linux-gnu redhat" on "CentOS release 5.3".
> 
> I want to verify a volume that was written several jobs ago. The volume 
> was written to a USB drive and I am afraid that the file is corrupted. The 
> volume is a differential backup that consists of 18 jobs (one job per file 
> set) from 2 different clients.
> 
> I have found several setups via google for the Verify job resource but 
> nothing with my exact situation. Here is my current job resource which 
> only tried to verify the last backup (incremental) of fileset0k and not 
> the previous differential backup of fileset0k.
> 
> Job {
>    Name = VerifyUSB
>    Type = Verify
>    Level = VolumeToCatalog
>    Messages = Standard
>    Pool = differential
> #  Client=server1.prinmath.com-fd
>    Client = server2.prinmath.com-fd
>    FileSet = fileset0k
>    Verify Job = fileset0k
> }
> 
> Here are my questions:
> 
> 1) How do I specify the "VerifyJob" resource if I want an older job than 
> the last backup of the specified fileset? Apparently a job number does 
> work here.

There is no way to do that with a VerifyJob at the moment.  It always verifies
the last matching jobid that ran.


> 2) Do I have to set up 18 Verify Jobs and run each one to verify the 
> entire volume or can I address the volume in it's entirety (remembering 
> that two clients wrote a total of 18 jobs to the volume).
> 
> 3) Can anyone point me to a solution that is similar to my situation?

You could check the low level consistency of the volume by using the bls
command line tool, which should check at least that every block matches its
checksum.

__Martin

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