From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bill Davidsen Subject: Re: Different sized disks for RAID1+0 or RAID10. Date: Thu, 11 Oct 2007 11:38:04 -0400 Message-ID: <470E435C.2090703@tmr.com> References: <2c4919c7d0aa93b6f41a7b2eb1ccd4e5@memcpy.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <2c4919c7d0aa93b6f41a7b2eb1ccd4e5@memcpy.com> Sender: linux-raid-owner@vger.kernel.org To: kbyrd-linuxraid@memcpy.com Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids Kelly Byrd wrote: > I've currently got a pair of identical drives in a RAID1 set for > my data partition. I'll be getting a pair of bigger drives in a > bit, and I was wondering if I could RAID1 those (of course) and > then RAID0 the two differently sized mds. Even better, will RAID10 > let me do this? > RAID-10 will let you do this, read past threads of this list for discussion of using the "far" option to gain performance. > I don't need to grow the current RAID1 into this new beast, I've > got a place I can copy the existing data so I can start from > scratch. > > I imagine the answer is: "sure RAID10 / RAID0 let's you do this, > but you don't get the striping performance benefit" for some of > the data", which would be ok with me until the smaller drives go > bad and I replace them. > Replacing the smaller drives could be an adventure if you plan to go to larger replacement drives. I don't recall the issues involved with using larger partitions and RAID-10, there's another issue for you to research. -- bill davidsen CTO TMR Associates, Inc Doing interesting things with small computers since 1979