From mboxrd@z Thu Jan 1 00:00:00 1970 From: Khelben Blackstaff Subject: Re: Alignment of RAID on specific boundary Date: Wed, 6 Jan 2010 16:44:31 +0200 Message-ID: <7b3edae11001060644j4d3d6742n2da0776480237766@mail.gmail.com> References: <7b3edae11001041130n42d053fcpc4923b22278c5671@mail.gmail.com> <4877c76c1001042257h49103054t977de11410eb65c6@mail.gmail.com> <7b3edae11001050544p4f99d7dbq83b72e385151c27@mail.gmail.com> <4B435C2E.4000201@anonymous.org.uk> <4877c76c1001051746q25df0a3dq5d9973dbdc27c583@mail.gmail.com> <7b3edae11001060500g2d63f2cav81bf8a90fc0b946b@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Return-path: In-Reply-To: <7b3edae11001060500g2d63f2cav81bf8a90fc0b946b@mail.gmail.com> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids 2010/1/6 Michael Evans : > wrote: >> Or move your partition start back by 136 sectors, or use version 0.90 or 1.0 >> superblocks which have the superblock at the end. > Indeed, that was one route I covered earlier in my message. > > However it is still a good idea improvement for mdadm to allow the > user to specify a non-default offset for the start of the > data-partition (for a number of reasons). > Yes, it will be nice if Mr. Brown implements this when he finds the time. I will use v1.0 as you both suggested till then. Since i am experimenting in Virtualbox, i tried to hexedit the superblock. I modified 0x80 (offset) from 136 to 256 and subtracted 256-136=120 from 0x88 (size). It seems to work fine :) Of course i did this because it is a test array in VB. I wouldn't mess with the real array. I just wanted to see if it will work. Thank you all for your help.