Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030530AbVIJCL5 (ORCPT ); Fri, 9 Sep 2005 22:11:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030529AbVIJCL5 (ORCPT ); Fri, 9 Sep 2005 22:11:57 -0400 Received: from omta02ps.mx.bigpond.com ([144.140.83.154]:33461 "EHLO omta02ps.mx.bigpond.com") by vger.kernel.org with ESMTP id S1030530AbVIJCL4 (ORCPT ); Fri, 9 Sep 2005 22:11:56 -0400 Message-ID: <432240E9.9010400@eyal.emu.id.au> Date: Sat, 10 Sep 2005 12:11:53 +1000 From: Eyal Lebedinsky Organization: Eyal at Home User-Agent: Debian Thunderbird 1.0.2 (X11/20050817) X-Accept-Language: en-us, en MIME-Version: 1.0 To: list linux-kernel Subject: RAID resync speed X-Enigmail-Version: 0.91.0.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 726 Lines: 20 I noticed that my 3-disk RAID was syncing at about 40MB/s, now that I added a fourth disk it goes at only 20+MB/s. This is on an idle machine. Individually, each disk measures 60+MB/s with hdparm. kernel: 2.6.13 on ia32 Controller: Promise SATAII150 TX4 Disks: WD 320GB SATA Q: Is this the way the raid code works? The way the disk-io is managed? Or could it be due to the SATA controller? -- Eyal Lebedinsky (eyal@eyal.emu.id.au) attach .zip as .dat - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/