From: Andreas Dilger Subject: Re: [RFC] store RAID stride in superblock Date: Thu, 31 May 2007 14:19:02 -0600 Message-ID: <20070531201902.GF5181@schatzie.adilger.int> References: <20070512020248.GQ6375@schatzie.adilger.int> <20070524114442.GA12526@schatzie.adilger.int> <46559E04.5060002@clusterfs.com> <20070531162109.GA23591@thunk.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Rupesh Thakare , linux-ext4@vger.kernel.org, Kalpak Shah To: Theodore Tso Return-path: Received: from mail.clusterfs.com ([206.168.112.78]:42739 "EHLO mail.clusterfs.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757355AbXEaUTI (ORCPT ); Thu, 31 May 2007 16:19:08 -0400 Content-Disposition: inline In-Reply-To: <20070531162109.GA23591@thunk.org> Sender: linux-ext4-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org 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.