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>> < as an aside >
>> I plan to stage backup to a second hard-drive on-line in the system,
>> and then rsync a copy to a second disk.

> Another option to consider is making the backup drive a RAID 1 volume.
> Then the mirroring is automatic and occurs at backup time.

> Matt Flaschen

True enough, but that leaves two other problems.

Theft or other loss or destruction of the mirrored drives.
In my scenario, one drive will be either off-site or protected in a
fire-proof safe. It will come on-site (or out of the safe) only to
refresh the mirror of the "live" archive.

Also, since it's not running all the time, it's lifetime should
probably be longer - though in all honesty, that's probably not much
of an issue.

I just most want to avoid losing all the copies of the backup archive
should the server get stolen or loss from fire etc. That basically
rules out a mirror of some kind - and perhaps the additional hardware
it would require.

-Greg