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Re: mkfs.xfs and zeroing of unwritten extents (was: TAKE - xfsprogs)

To: linux-xfs@xxxxxxxxxxx
Subject: Re: mkfs.xfs and zeroing of unwritten extents (was: TAKE - xfsprogs)
From: Nathan Scott <nathans@xxxxxxx>
Date: Tue, 25 Mar 2003 17:40:46 +1100
In-reply-to: <20030325060834.GF22572@xxxxxxxxxxxxxxxxxxxx>
References: <200303250401.h2P41L5s3043128@xxxxxxxxxxxxxxxxxxxxxxx> <20030325060834.GF22572@xxxxxxxxxxxxxxxxxxxx>
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On Tue, Mar 25, 2003 at 02:08:34PM +0800, Federico Sevilla III wrote:
> ...
> I read in the announcement about the new Debian package for xfsprogs
> that zeroing out of unwritten extents is now enabled by default in
> mkfs.xfs.  A search about unwritten extents pointed me to
> <http://oss.sgi.com/projects/xfs/todos.html>.

There has been more extensive discussion on the XFS list recently;
see the archives, I don't have a pointer handy.

> I haven't been in touch with XFS development lately[1], so please pardon
> me if this was discussed previously. Is there anything that has to be
> done for systems that were created with slightly older versions of
> xfsprogs (eg: 2.3.11)?

You can enable unwritten extents using the xfs_admin(8) -e option.

> What problems to XFS filesystems created on top
> of previously existing filesystems (eg: ext3) pose?

None at all.

cheers.

-- 
Nathan


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