From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Robinson Subject: Re: Question on RAID 10 setup Date: Tue, 24 Mar 2009 23:48:49 +0000 Message-ID: <49C97161.5020207@anonymous.org.uk> References: <1183FAF84E86E244938C2174EE436BAC030FBE29@NYKPCMEU306VEUA.INTRANET.BARCAPINT.COM> <3513de790903241515m2eeff929x855322a51117c45b@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <3513de790903241515m2eeff929x855322a51117c45b@mail.gmail.com> Sender: linux-raid-owner@vger.kernel.org To: Dylan Distasio Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On 24/03/2009 22:15, Dylan Distasio wrote: > Hi all- > > I would like to put together a RAID10 array utilizing 2x1TB drives and > 2x500 gig drives I have in my home Linux server. Is the best way to do > this to create 2 separate RAID1 arrays, one for each set of drives, and > then a RAID0 array made up of the RAID1 ones? I just wanted to verify > that I am going about this correctly, and also get input on whether > there are any disadvantages to this setup. I would prefer not to split > these up into two separate RAID10 arrays because I want the combined > space available under one. Thanks for any comments. I think you can mix drive sizes under md RAID-10 - much as you're proposing to above with your RAID-0 of different-sized RAID-1s - and md will just do the Right Thing. I'd go for testing that and play with layouts (near, far, offset) to suit your requirements before worrying about setting up RAID 1+0. Actually with your hardware I'd probably set up a 1TB RAID-0 with the 500G drives then make a RAID-5 from the 3 1TB devices (2 raw drives plus one md RAID-0). If you can be bothered try benchmarking that too; as well as giving you more storage I think it'll probably match the RAID-10 or RAID 1+0 for performance. Cheers, John.