BackupPC-users

Re: [BackupPC-users] Bad md5sums due to zero size (uncompressed) cpool files - WEIRD BUG

2011-10-07 05:23:06
Subject: Re: [BackupPC-users] Bad md5sums due to zero size (uncompressed) cpool files - WEIRD BUG
From: Tim Fletcher <tim AT night-shade.org DOT uk>
To: Holger Parplies <wbppc AT parplies DOT de>
Date: Fri, 07 Oct 2011 10:21:29 +0100
On Thu, 2011-10-06 at 17:54 +0200, Holger Parplies wrote:

> To be honest, I would *hope* that only you had these issues and everyone
> else's backups are fine, i.e. that your hardware and not the BackupPC software
> was the trigger (though it would probably need some sort of software bug to
> come up with the exact symptoms).

So far my scan of one of my systems has finished and has given:

758080 files in 4096 directories checked, 0 had wrong digests, of these
0 zero-length.

Another system is currently up to a/f/d of a full scan and has found the 
following errors

tim@carbon:~$ grep -v ok /tmp/pool-check.txt ; tail -n 1 /tmp/pool-check.txt
[335403] 1ef2238fe0d1e5ffb7abe1696a32ae91     (       384) != 
5c6bec8866797c63a7fbdc92f8678c1f
[397563] 2429be9ee43ac9c7d0cb8f0f4f759cd8     (       364) != 
12351030008ccf626abd83090c0e5efa
[761269] 452017085ec5f0a21b272dac9cbaf51c     (      2801) != 
b4f9ab837e47574f145289faddc38ca2
[1260873] 72ed33567c8fbda29d63ade20f13778d     (       364) != 
8521efc754784ac13db47545edb22fcd
[1380912] 7d264e0aedb7d6693946594b583643d6     (       270) != 
c15a891ef0ab8d4842196fcbaf3e6b9f
[1534431] 8a7e659dd6d0a4f45464cc3f55372323     (        58) != 
de0ac1b424d9a022b4f3415896817ec4
[1598997] 90097fdb369c0152e737c7b88c0f6ff6     (       282) != 
16d682e1c10bee80844e6966eaabbbcf
[1873732] a9d171972fca12bf03c082b7fba542d1     (       364) != 
ee42dab9abc3486325a674779beaabcc
[1940164] afd73ec3463ea92cfd509ead19f938f5     (      5102) ok

Once the scan has finished I'll do a bit more digging about when the
files where created and from which host I'm backing up.

The hardware in both cases is the same, a HP Microserver with a a raid5
disk set. 

The one without errors is running Fedora 15 32bit but with a pool that
has been moved from Ubuntu 10.04 32bit a few months ago, the pool dates
from the 20/09/2010. 

The one with errors has always been on current Ubuntu 32bit, the pool
dates back to 08/01/2010. 

-- 
Tim Fletcher <tim AT night-shade.org DOT uk>


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