[BackupPC-users] cpool corruption not fixed by subsequent backups

I have recently had some weird hardware or software errors on my 
backuppc filesystem. I have fixed the filesystem errors but some of my 
cpool files have been corrupted. Firstly, during a restore I was getting 
Error: padding messages like this one:

Error: padding .... to 33267797 bytes from 32505856 bytes

for quite a few files. I tried to manually decompress the files and that 
didn't work:

/usr/share/backuppc/bin/BackupPC_zcat: can't uncompress ...

So the files have been corrupted. But they are not fixed by future 
backups that use the corrupted backup as a baseline, these error lines 
are in the XferLOG file

Unable to read 3641536 bytes from 
/var/lib/backuppc/pc/XXX/new//fexpdata/RStmp got=2930688, 
seekPosn=130238464 (9728,272,10001,133169152,133881404)
Unable to read 3641536 bytes from 
/var/lib/backuppc/pc/XXX/new//fexpdata/RStmp got=2930688, 
seekPosn=130238464 (9728,272,10001,133169152,133881404)
Unable to read 1614336 bytes from 
/var/lib/backuppc/pc/XXX/new//fexpdata/RStmp got=1350656, 
seekPosn=29058048 (9216,512,10001,30408704,31531852)
Unable to read 1614336 bytes from 
/var/lib/backuppc/pc/XXX/new//fexpdata/RStmp got=1350656, 
seekPosn=29058048 (9216,512,10001,30408704,31531852)
Unable to read 1284112 bytes from 
/var/lib/backuppc/pc/XXX/new//fexpdata/RStmp got=211456, 
seekPosn=45925888 (9728,272,10001,46137344,47210572)
Unable to read 1284112 bytes from 
/var/lib/backuppc/pc/XXX/new//fexpdata/RStmp got=211456, 
seekPosn=45925888 (9728,272,10001,46137344,47210572)

At the moment what I'm doing is decompressing my entire cpool, detecting 
corrupted files and removing them from existing backups, then doing a 
nightly to remove them from the cpool. Is this a known problem or is 
there an easier way of fixing it?

Thanks.

-- 
Dr Christopher Adamson, PhD (Melb.), B Software Engineering (Hons., Monash)
Research Officer
Developmental Imaging, Critical Care and Neurosciences

Murdoch Childrens Research Institute
The Royal Children’s Hospital
Flemington Road, Parkville,Victoria, 3052, Australia
T 9906 6780
M XXXX XXX XXX
E chris.adamson AT mcri.edu DOT au
www.mcri.edu.au


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