From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: Re: expand raid10 Date: Thu, 14 Apr 2011 09:28:24 +1000 Message-ID: <20110414092824.337d3874@notabene.brown> References: <20110413111015.GA10195@www2.open-std.org> <20110413211715.286d9203@notabene.brown> <20110413123413.GA10377@www2.open-std.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20110413123413.GA10377@www2.open-std.org> Sender: linux-raid-owner@vger.kernel.org To: Keld =?ISO-8859-1?B?Svhybg==?= Simonsen Cc: Roberto Spadim , Mathias =?ISO-8859-1?B?QnVy?= =?ISO-8859-1?B?6W4=?= , Linux-RAID List-Id: linux-raid.ids On Wed, 13 Apr 2011 14:34:14 +0200 Keld J=F8rn Simonsen wrote: > On Wed, Apr 13, 2011 at 09:17:15PM +1000, NeilBrown wrote: > > On Wed, 13 Apr 2011 13:10:16 +0200 Keld J=F8rn Simonsen wrote: > >=20 > > > On Wed, Apr 13, 2011 at 07:47:26AM -0300, Roberto Spadim wrote: > > > > raid10 with other layout i could expand? > > >=20 > > > My understanding is that you currently cannot expand raid10. > > > but there are things in the works. Expansion of raid10,far > > > was not on the list from neil, raid10,near was. But it should be = fairly > > > easy to expand raid10,far. You can just treat one of the copies a= s your > > > refence data, and copy that data to the other raid0-like parts of= the > > > array. I wonder if Neil thinks he could leave that as an exersiz= e for > > > me to implement... I would like to be able to combine it with a > > > reformat to a more robust layout of raid10,far that in some cases= can survive more > > > than one disk failure. > > >=20 > >=20 > > I'm very happy for anyone to offer to implement anything. > >=20 > > I will of course require the code to be of reasonable quality befor= e I accept > > it, but I'm also happy to give helpful review comments and guidance= =2E > >=20 > > So don't wait for permission, if you want to try implementing somet= hing, just > > do it. > >=20 > > Equally if there is something that I particularly want done I won't= wait for > > ever for someone else who says they are working on it. But RAID10 = reshape is > > a long way from the top of my list. >=20 > Hi Neil! >=20 > Yes, that is how I understand your policy on contributions. >=20 > Do you by RAID10 reshaping also mean RAID10 expansion? > In my eyes this is quite important, and something that I have wanted = for > a long time. I think it is a quite common task for many Linux MD user= s. >=20 > best regards > keld Yes, by 'reshaping' I mean everything included here: http://neil.brown.name/blog/20110216044002#11 which includes size changes. NeilBrown -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html