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Re: [rdiff-backup-users] Backup not identifying changed file, even thoug
From: |
Chris Wilson |
Subject: |
Re: [rdiff-backup-users] Backup not identifying changed file, even though hash is different |
Date: |
Thu, 24 Mar 2011 20:42:39 +0000 (GMT) |
User-agent: |
Alpine 2.00 (DEB 1167 2008-08-23) |
Hi Scott,
On Thu, 24 Mar 2011, Scott Jilek wrote:
Unfortunately, I can't just touch the file because it's in use and locked by
the truecrypt process.
In that case, rdiff-backup probably won't be able to open it to back it up
either? You'll probably get an error message that the file can't be opened
when you try to back it up? And even if you could back it up, you'd
probably get an inconsistent and hence useless/corrupt backup if truecrypt
is really writing to the encrypted filesystem while a backup or rsync is
in progress.
I could try to install one of the windows rsync variants in this case,
but the whole idea of a practical backup process to me is getting
multiple snapshots in time, whereas rsync only gives me efficient
mirroring. I'm not too keen on mirroring as a backup strategy, because
corrupted files completely destroy the usefulness of mirroring. If it's
bad in the source, it becomes bad in the singular backup as soon as the
backup process runs and then you have no recovery option. With Rdiff, I
can go back in time to just before the corruption occurred and restore
the file to the last know working time. As far as I'm concerned, simple
mirroring is not a safe method of backup
You could rsync the truecrypt file to somewhere else, if that works, and
then back it up with a separate rdiff-backup command?
Or alternatively create a VSS snapshot and back that up? But Truecrypt
would probably need to be patched to be a VSS writer, or to not
reset the timestamp when it writes to the file, because you probably
can't change the timestamp in the VSS snapshot, it being a snapshot and
hence read-only.
Cheers, Chris.
--
_____ __ _
\ __/ / ,__(_)_ | Chris Wilson <address@hidden> Cambs UK |
/ (_/ ,\/ _/ /_ \ | Security/C/C++/Java/Ruby/Perl/SQL Developer |
\__/_/_/_//_/___/ | We are GNU : free your mind & your software |
- Re: [rdiff-backup-users] Backup not identifying changed file, even though hash is different, Scott Jilek, 2011/03/23
- Re: [rdiff-backup-users] Backup not identifying changed file, even though hash is different, Patrick Nagel, 2011/03/23
- Re: [rdiff-backup-users] Backup not identifying changed file, even though hash is different, Dominic Raferd, 2011/03/24
- Re: [rdiff-backup-users] Backup not identifying changed file, even though hash is different, Scott Jilek, 2011/03/24
- Re: [rdiff-backup-users] Backup not identifying changed file, even though hash is different, Dominic Raferd, 2011/03/24
- Re: [rdiff-backup-users] Backup not identifying changed file, even though hash is different,
Chris Wilson <=
- Re: [rdiff-backup-users] Backup not identifying changed file, even though hash is different, Scott Jilek, 2011/03/24
- Re: [rdiff-backup-users] Backup not identifyi ng changed file, even though hash is different, Patrick Nagel, 2011/03/25
- Re: [rdiff-backup-users] Backup not identifying changed file, even though hash is different, Patrick Nagel, 2011/03/25