Re: [SLUG] Partitioning (Again?!)

From: Derek Glidden (dglidden@illusionary.com)
Date: Wed Sep 18 2002 - 10:56:55 EDT


On Tue, 2002-09-17 at 23:04, Paul Braman wrote:
>
> On Tue, 17 Sep 2002, Paul M Foster wrote:
> >
> > Now, the question is, given _this_ situation, are there any
> > liabilities to the one-partition-rsync'd-to-a-second-drive scenario?

(I'm specifically ignoring the partitioning question because nobody has
ever agreed with the way I like to partition drives.)

If the process is automated and something happens in the middle of the
night after you've left the machine but before the rsync happens, you
lose everything.

I do similar things at home, but I generally run the rsync manually to
avoid this issue. If you do it for a bit, it just becomes a habit that
"just before you log out for the night, run the rsync to back everything
up."
 
> One thing I would investigate, if you felt like it, is motherboards with
> RAID controllers built in. You could run in "whatever that RAID is that
> protects data in cast of failure, instead of for speed" and you wouldn't
> have to do the rsync yourself.

Two problems:

1) those "built-in RAID" are invariably all software-RAID that are only
supported through Windows-only drivers.

2) if there's filesystem corruption of some sort due to a software
failure scrambling the filesystem, not hardware failure, the RAID will
just mirror that failture onto both drives.

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