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Date: Tue, 2 May 2006 11:15:55 -0500 (CDT)
From: Philip Hallstrom <freebsd@philip.pjkh.com>
To: dick hoogendijk <dick@nagual.st>
In-Reply-To: <20060502111316.GA1267@arwen.nagual.st>
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Cc: freebsd-questions <freebsd-questions@freebsd.org>
Subject: Re: backup system rsync <-> dump
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> I have two disks; one is the fbsd system drive, the other is for backup
> purposes.
>
> I'm in doubt about what to use: dump or rsync
>
> I guess I can do something like:
> mount /dev/ad1s3a /backup/root
> mount /dev/ad1s3d /backup/var
> mount /dev/ad1s3f /backup/usr
> /usr/local/bin/rsync -avHxS --delete /usr /backup/usr
> for /usr / and var

If you do go with rsync, watch the "-delete".  If for some reason you blow 
away /usr/local/etc and then run your backup you'll blow away your backed 
up /usr/local/etc as well.  Probably not what you want :)

With the right settings of --backup --backup-dir you can easily create a 
week (or two or three or whatever) archive of the "daily" changed files. 
So, for example..

/backup/usr - contains identical copy
/backup/dailys/usr/Mon - contains files that changed on /usr on Monday.

Then just set things up to rotate/expire the old copies and you have an 
easy way to get files back you deleted that you didn't mean to.

I can post the whole script if you're interested...

-philip