Received: from localhost (unknown [200.46.204.183]) by postgresql.org (Postfix) with ESMTP id E487D2E0132 for ; Fri, 29 Feb 2008 18:48:28 -0400 (AST) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.183]) (amavisd-maia, port 10024) with ESMTP id 12301-03 for ; Fri, 29 Feb 2008 18:48:25 -0400 (AST) X-Greylist: delayed 00:15:00.942079 by SQLgrey-1.7.5 Received: from smtp4.clear.net.nz (smtp4.clear.net.nz [203.97.37.64]) by postgresql.org (Postfix) with ESMTP id 7762B2E00BE for ; Fri, 29 Feb 2008 18:48:25 -0400 (AST) Received: from zmori.markir.net (121-72-86-144.dsl.telstraclear.net [121.72.86.144]) by smtp4.clear.net.nz (CLEAR Net Mail) with ESMTP id <0JX000BJ5UNFOT00@smtp4.clear.net.nz> for pgsql-performance@postgresql.org; Sat, 01 Mar 2008 11:33:16 +1300 (NZDT) Date: Sat, 01 Mar 2008 11:33:10 +1300 From: Mark Kirkwood Subject: Re: 12 disks raid setup In-reply-to: To: Greg Smith Cc: Franck Routier , pgsql-performance Message-id: <47C88826.4040209@paradise.net.nz> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1; format=flowed Content-transfer-encoding: 7bit References: <1204285894.11773.33.camel@franck-gusty> <1204296705.11773.51.camel@franck-gusty> User-Agent: Thunderbird 2.0.0.9 (X11/20071203) X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200802/406 X-Sequence-Number: 28948 Greg Smith wrote: > > The only real downside of md RAID is that if you lose the boot device > it can be tricky to get the system to start again; hardware RAID hides > that little detail from the BIOS. Make sure you simulate a failure of > the primary boot drive and are comfortable with recovering from that > situation before you go into production with md. +1 I usually ensure there is a separate /boot that is setup RAID1 (with md using all the disks for the RAID1 - so the I can keep the partition map the same for all the disks, otherwise it is fiddly!) Cheers Mark