From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keld =?iso-8859-1?Q?J=F8rn?= Simonsen Subject: Re: [PATCH 00/18] Assorted md patches headed for 2.6.30 Date: Thu, 12 Feb 2009 10:46:04 +0100 Message-ID: <20090212094604.GA11981@rap.rap.dk> References: <20090212031009.23983.14496.stgit@notabene.brown> <20090212081148.GD9439@rap.rap.dk> <4993E82D.1020309@fairbairn-family.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: <4993E82D.1020309@fairbairn-family.com> Sender: linux-raid-owner@vger.kernel.org To: Steve Fairbairn Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Thu, Feb 12, 2009 at 09:13:17AM +0000, Steve Fairbairn wrote: > Keld J=F8rn Simonsen wrote: > > > >I would rather have functionality to convert raid10 to raid5. > >raid1 should be depreciated, as raid10,n2 for all purposes is the sa= me > >but better implementation and performance, and raid10,f2 and raid10,= o2 > >are even better. Nobody should use raid1 anymore. > > > Complete ignorance of raid10 here, but is raid10, bootable,= =20 > like raid1 is? I use raid1 on my root and boot partitions. AFAIK, raid10,n2 in default mode (superblock etc) is bootable, as it looks like two copies of a normal FS. I think this was even reported=20 on this list at some time.=20 You are not the only one that does not know much about raid10. I think most Linux administrators don't. And other system adminstrators most likely don't either. Maybe we should rename raid10 to raid1? Raid10 should just be an enhanced raid1. And I understand from Neil tha= t raid10,o2 is mostly done because it is a standard raid1 layout. So it i= s strange that it is not available with raid1 in Linux. And I also think that the raid10,f2 layout is available from some HW raid controllers, a= s their implementation of raid1. So all what is in raid10 is other places considered raid1 stuff. Or we could merge the two drivers.=20 I think we will never get people in general to know about raid10 as wel= l as they know about raid1, not even by far.=20 Best regards keld -- 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