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Date:	Thu, 31 May 2007 14:19:02 -0600
From:	Andreas Dilger <>
To:	Theodore Tso <>
Cc:	Rupesh Thakare <>,,
	Kalpak Shah <>
Subject: Re: [RFC] store RAID stride in superblock

On May 31, 2007  12:21 -0400, Theodore Tso wrote:
> On Thu, May 24, 2007 at 07:45:32PM +0530, Rupesh Thakare wrote:
> > I've added "s_raid_stripe_width" parameter in superblock.
> > I've also incorporated "s_raid_stride" and "s_raid_stripe_width" 
> > parameters in tune2fs.
> > The new options can be specified using  '-E options' in both mke2fs and 
> > tune2fs.
> > Both the Man pages (mke2fs and tune2fs) are updated accordingly.
> > Patch is attached herewith.
> Thanks.  I've used a different offset for the raid_stripe_width, to
> avoid conflicting with Kalpak's mmp patch.  

Ah, we've been doing it the other way around here.  It makes sense to keep
the s_raid_stripe_width fields together.  I think this code is preliminary
enough that nobody has actually started using it yet.  Can you please post
what the end of ext2_super_block looks like (whether you decide to reorder
the fields or not).

Cheers, Andreas
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.

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