From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Clements Subject: Re: write only raid1 Date: Wed, 10 Nov 2004 10:05:34 -0500 Message-ID: <41922E3E.7050206@steeleye.com> References: <1100096418.3190.4.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1100096418.3190.4.camel@localhost.localdomain> Sender: linux-raid-owner@vger.kernel.org To: mingz@ele.uri.edu Cc: Neil Brown , linux-raid@vger.kernel.org List-Id: linux-raid.ids Ming Zhang wrote: > is there any technical issue that lead not to be implemented? No. In fact, it has been implemented. Both Peter T. Breuer and I have come up with slightly different patches to implement the write only functionality. > is there any place to find previous discussion on this? i try the google > but fail. i do no know which key word can find that. thx. Try the archives of this mailing list: http://marc.theaimsgroup.com/?l=linux-raid&r=1&w=2 This has been discussed a couple of times and patches have been posted to the list in the past. -- Paul > On Thursday November 4, mingz@ele.uri.edu wrote: > >>Hi, folks? >> >>I would like to know if current RAID1 support or willing to support a >>RAID1 with a write only device? For example, u can setup 2 disks to > > form > >>a raid1, you fork 2 writes to both disks while you only read from one. >>this will be very useful for logging purpose or replication. > > > This functionality has been discussed, but have not been implemented > in a released kernel yet. > > NeilBrown > > > - > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >