From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751601AbWCBQ5b (ORCPT ); Thu, 2 Mar 2006 11:57:31 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751996AbWCBQ5b (ORCPT ); Thu, 2 Mar 2006 11:57:31 -0500 Received: from mcr-smtp-002.bulldogdsl.com ([212.158.248.8]:6416 "EHLO mcr-smtp-002.bulldogdsl.com") by vger.kernel.org with ESMTP id S1751601AbWCBQ5a (ORCPT ); Thu, 2 Mar 2006 11:57:30 -0500 X-Spam-Abuse: Please report all spam/abuse matters to abuse@bulldogdsl.com From: Alistair John Strachan To: Neil Brown Subject: Re: RAID5 initial rebuild slow, 2.6.16-rc4 Date: Thu, 2 Mar 2006 16:57:22 +0000 User-Agent: KMail/1.9.1 Cc: linux-kernel@vger.kernel.org References: <200603021648.21465.s0348365@sms.ed.ac.uk> In-Reply-To: <200603021648.21465.s0348365@sms.ed.ac.uk> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200603021657.22345.s0348365@sms.ed.ac.uk> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thursday 02 March 2006 16:48, Alistair John Strachan wrote: > Hi Neil, > > I recently purchased two SATA2 Western Digital WD2500KS (250GB) HDs to add > to a pair of Maxtor DiamondMax 10's (200GB). I planned to initialise two > 100GB RAID5 arrays spanning all four drives (the remaining 2x50GB on the > new HDs is currently used for booting). > > All the drives are connected to the same controller. I'm running mdadm > 2.3.1, which is the latest version I believe. I created the array with the > following command: > > mdadm --create /dev/md1 --auto=yes --chunk=64 --level=5 > --raid-devices=4 /dev/sda3 /dev/sdb3 /dev/sdc2 /dev/sdd2 Okay, adding --force after --auto didn't fix it, but when I ran mkfs.xfs without waiting, the restore speed jumped to 20MB/s. Expected behaviour? -- Cheers, Alistair. 'No sense being pessimistic, it probably wouldn't work anyway.' Third year Computer Science undergraduate. 1F2 55 South Clerk Street, Edinburgh, UK.