Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 13 Oct 2001 09:51:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 13 Oct 2001 09:51:11 -0400 Received: from chabotc.xs4all.nl ([213.84.192.197]:46225 "EHLO chabotc.xs4all.nl") by vger.kernel.org with ESMTP id ; Sat, 13 Oct 2001 09:50:51 -0400 Subject: Very good results with 2.4.12 on a Dell PowerEdge 2550/PERC 3SI Raid From: Chris Chabot To: linux-kernel@vger.kernel.org Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Mailer: Evolution/0.15 (Preview Release) Date: 13 Oct 2001 15:51:14 +0200 Message-Id: <1002981074.922.4.camel@gandalf.chabotc.com> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hello All, I just installed linux kernel 2.4.12 on some test PowerEdge 2550 boxes, with a PERC 3/Si Raid card (4x 10krpm scsi u160 disks, 128Mb cache, one raid5 volume, using domsch/adaptecs aacraid driver). Previously (using 2.4.2 & 2.4.9) the raid volume had a very disapointing read spead of around 22 Mb/sec (a single disk is faster!). You can imagine my suprise when i installed 2.4.12, and the read speed went up to around 60 Mb / Sec ! I tested this speed increase with hdparm, bonnie+, and various 'real life' applications, and it truely is a lot, i repeat _a lot_ faster for me. I don't know what changed in the block layer between then and now, but please don't change it back ! ;-) -- Chris Chabot - 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/