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Date: Fri, 11 Sep 2009 10:21:45 +1000
From: Andrew Snow <andrew@modulus.org>
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Cc: freebsd-stable@freebsd.org
Subject: Re: gconcat file system damage
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How did you expand the filesystem onto the new volume?  UFS2 expansion 
is not supported.

> I originally created the concatted disk in two steps. First I created 
> the concat on my new mirrored disks and copied the files from my 
> existing mirror in there. Second I appended the existing mirror to my 
> concatted disk. It seemed to work fine, but now I'm seeing so much 
> errors that I can only mount the concat r/o!