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From: Tim Watts <tw_usenet@dionic.net>
Newsgroups: comp.os.linux.misc
Subject: Re: How do home users of linux protect themselves against ill-advised changes?
Date: Mon, 05 Jan 2015 21:04:04 +0000
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On 05/01/15 19:17, The Natural Philosopher wrote:

> my advice: don't bother.
>
> simply set one disk to mirror the other with rsync.
>
> setting it up to boot from one if the other goes bad is not so trivial


If doing that, you might as well tell rsync to keep the incrementals too 
(changed files) - then you have a meaningful backup system as well as 
fast disaster recovery.