View Full Version : Back up solution suggestion

Eric Gauthier
2004-12-08, 18:17
I third this motion. I use rsync for both my digital photos and music. I
snapshotted with a friend with our machines side by side, and now we rsync
via ssh over the Internet (since the data is relatively static and rsync is
efficient this works well). We each take each others data on a spare 250GB
IDE drive.

I also have a local system rsyncing nightly in the case that I just have a
failure (not a fire or flood or whatever). Works for us, and the servers
are cheap Pentium III's built from spare parts. I don't care so much about
the music since I can recreate it (it would be a pain, but it is possible).
However, the digital photos are irreplaceable, and I don't trust DVD's or
CD's for long term storage, perhaps I am just paranoid. With the low GB
costs of HDDs today, I much prefer geographically dispersed redundant copies
to tape or CD/DVD.

I now also use a windows version of rsync (via cgywin) to mirror my music to
a USB drive attached to my laptop so I can take it all with me when I


-----Original Message-----
From: discuss-bounces (AT) lists (DOT) slimdevices.com
[mailto:discuss-bounces (AT) lists (DOT) slimdevices.com] On Behalf Of Ben Klaas
Sent: Wednesday, December 08, 2004 4:47 PM
To: Slim Devices Discussion
Subject: [slim] Back up solution suggestion

I second the motion that rsync is the way to go...

Also, take a look at a simple perl wrapper around rsync called rsnapshot

"Using rsync and hard links, it is possible to keep multiple, full
backups instantly available. The disk space required is just a little
more than the space of one full backup, plus incrementals. "

(Kevin, it ain't perfect, but this is a way to safeguard against file
deletion stupidity you mention below)

I use it to backup to an internal secondary HD for music at home, and I
use it rsyncing via ssh across a network for work backups. In both
cases, works like a charm.


Kevin Walsh wrote:
> spw [slim (AT) clock-tower (DOT) com] wrote:
>>I have been in the computer business since 1967 and have pondered on
>>the best backup solution ever since. You have two problems to
>>overcome: 1. Accidental loss of data due to hard drive failure
>>2. Loss of your PC itself due to fire, theft etc.
>>A RAID solution will not overcome the second scenario.
>>DVDs are impractical if you have a large collection (>50Gb), and I don't
>>believe in incremental backups unless you are super-organised.
> I have an old P200 server with 200GB of usable disk space. Every day
> (5:05am), this server contacts all of the other servers, in turn, and
> grabs a full system backup (mirror) using rsync. Rsync is ideal in
> that it only transfers files that have been modified since the last
> backup ensuring that, once the run has completed, the snapshot is up
> to date.
> If an original server dies then the backup is accessible. If the
> backup server dies then it can be replaced and a new backup run can be
> started. The contents of the backup server are saved to a bunch of
> DDS-4 tapes every week. It doesn't really matter how long a tape
> backup run takes (within reason) because nobody is actually "using"
> that server.
> Lastly, every server has its own RAID array. The critical system have
> hardware raid and the others have software RAID. The backup server
> has a simple software RAID mirror. This all helps recover from a
> simple disk failure.
> This is a disaster recovery system; The only thing I can't do is
> recover a file I deleted two days ago, unless it happens to be on
> tape. It's difficult to guard against stupidity. :-)
> This is a good use for an old server that you might have sitting
> somewhere, collecting dust. It doesn't take a lot of processing power
> to run a backup server, and the solution is reasonably scalable; You
> can increase the size/number of disks in the backup server or run
> multiple backup servers.
> The backup server doesn't have to be on the local LAN because
> rsync/ssh uses an encrypted link. Remote backup servers can also help
> you recover from server theft, and you can set one up wherever you can
> find a DSL line that's not in use at 5:05am.