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back up gentoo system
\ David (6 May 2008)
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Subject:Re: back up gentoo system
Group:Gentoo-user
From:Andrew MacKenzie
Date:6 May 2008


 

+++ David [gentoo-user] [Wed, May 07, 2008 at 12:18:58AM +0200]:
> On Tuesday 06 May 2008 23:54:08 Andrew MacKenzie wrote:
> > If you're using 'dd' does that mean you're copying the entire filesystem
> > and not just the files? I believe that can run you into some issues if the
> > FS isn't read-only...
> What kind of issues? The idea is to copy the whole filesystem to another disk
> and keep it sync. And in case of "crisis" use dd from the backup to the
> original disk.
There is the possibility that something changes on disk and you've already
copied the 'references' to it in the journal or index. Thus making your
image inconsistent or corrupted. You also have files cached in memory not
yet written to disk, etc. It's also very inefficient copying all the empty
parts of your file system as well.

At the least you'll want to mount your file system read-only if you're
going to use dd to make a copy.


--
// Andrew MacKenzie | http://www.edespot.com
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// -- Dave Decot



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