Vetch wrote at about 00:14:06 +0100 on Wednesday, July 22, 2009:
> Hi Matthias,
>
> Thanks for your help on this...
>
> See replies below...
>
> On Tue, Jul 21, 2009 at 6:40 PM, Matthias Meyer <matthias.meyer AT gmx DOT
> li>wrote:
>
> > Vetch wrote:
> >
> > >
> > > Ok - I tried direct restores back into the original directories over the
> > > network - and it came up with successful restores for all the home
> > > directories...
> > > Does this mean that the data has been fully successfully restored?
> >
> > Probably. But as I said, BackupPC didn't check file consistency.
> >
>
> Ok... So it could be that the files are corrupt in the database...
> Though given the positive e2fsck results, that seems unlikely...
>
>
> >
> > > I think I have about 1000 files missing (out of about 35000)...
> >
> > You think? Do you really miss one of this 1000 files?
> >
>
> No - I haven't noticed any missing files, so I'm not too worried
> (realistically, I tend to keep numerous versions of any important document
> I'm working on anyway, so...)
>
> > Now, this wouldn't be the end of the world, but I'd be interested to know
> > if when it reports success, it has definitely brought back the entire
> > dataset...
>
> Yes. But possible not all the files YOU expected in the backup dataset.
> >
>
> Ok... so backuppc managed to restore all the data it has available...
> ... but perhaps I didn't count properly, or alternatively, didn't backup
> properly in the first place...
>
>
> >
> > > ... and if so... do you have any suggestions as to why I may have
> > > different numbers of files?
> > >
> >
> > How do you measure the file counts?
>
>
> I took the somewhat unscientific approach of using an offline backup and
> using windows to count the files based on the properties...
> Essentially, I had one of the folders stored as an offline backup (the one
> with 35000-ish files in) which I synchronise most days...
> I used the windows properties to count files in the folder (36026) and then
> I took an archive (zip) copy of my offline directory which also 36026 files
> in it, based on the archive file count...
> I then connected to the server, synchronised and used the windows properties
> on it again...
> It showed (I can't remember now exactly), but I believe it was around
> 35200...
> I then restored the archive and now the folder properties report 36093 (I
> attribute the extra files to being ones which are not offline synchronisable
> using the Windows XP offline files (e.g. .pst files, etc)...
> Now, potentially, I guess that means that there could have just been more
> files on my offline copy (I expected about 14 since the offline synch
> claimed that 14 files had changed and needed to be synchronised)...
> Equally, possibly there were files on my offline copy that couldn't be
> copied to the server through synch and I didn't know...
> ... though I would have expected to have noticed previously...
> Equally, it's possible that the backuppc user didn't have rights on the
> server to backup all files on the server, but I was ssh-ing in and sudo-ing
> the command, so I believe that should give it root access for the rsync
> command...
> I don't know - it just seems like there should have been more files...
>
> Like I say, I'm not particualarly bothered, as I think it's highly unlikely
> any of the files I genuinely need have been completely lost, but still...
> I'd be interested in knowing what caused the discrepancy - if it's my
> counting, my setup, my configuration or the system behaving strangely...
Well, with Windows there can be all kinds of reasons for mismatches
including:
1. Busy files that can't be backed up (not just .pst files but also
other open files and various registry and system files)
2. Permissions/acl issues - even with ssh as admin/root there may
still be files you can't access. I'm not a Windows guru but I know
it's not as simple as linux where root can read everything
3. Junctions can end up being double counted
4. Other weird Windows detritus - I have at times had weird ntfs files
that hang around and are non-deletable (until I boot into Linux)
Maybe I'm biased, but I always find Windows to be way more cumbersome,
obscure, and unpredictable than the simple metaphors of *nix
filesystems.
>
>
> >
> > > I've just tried this - I booted to a live CD and e2fsck-ed the device...
> > > On first scan, it reported clean... I'm now running a e2fsck -f to force
> > > it to check, but assuming that it reports the device as clean, then can I
> > > assume that the backups are not corrupted?
> >
> > Yes!
>
>
> Excellent... Well, that's good news...
>
> >
> >
> > > In which case, I have to wonder about the missing files...
> > > Am I just worrying unneccessarily?
> > >
> > Probably. We didn't know yet if really files are missing or if your
> > measurement is wrong.
> >
>
> Heh - it's probably my measurement, isn't it? ;)
> Oh well - let's hope so ;)
>
> Once again many thanks,
>
> Jx
>
>
> > br
> > Matthias
> > --
> > Don't Panic
> >
> >
> >
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> >
>
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