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From: Andreas Dilger <adilger@clusterfs.com>
Date: Tue, 3 Sep 2002 11:04:16 -0600
To: Ulrich Windl <Ulrich.Windl@rz.uni-regensburg.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: ext2 anomaly when making filesystem?
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On Sep 03, 2002  08:22 +0200, Ulrich Windl wrote:
> Being curious, I dumped the metadata after creation and found some odd 
> thing: For several allocation groups there was a gap in the free 
> blocks. First I thought it is intentional; maybe to put administrative 
> data in the moddle of the allocation group, but then I found that other 
> groups had no such gap. I'll attach the dump at the end.
> 
> If it's intentional, maybe add some documentation about the layout to 
> the manual pages; if it's a bug, it would be nice to see it fixed.

It _is_ intentional.  The groups which have a gap do not have a backup
superblock or group descriptor table.

Cheers, Andreas
--
Andreas Dilger
http://www-mddsp.enel.ucalgary.ca/People/adilger/
http://sourceforge.net/projects/ext2resize/

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