From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933367AbXC0Q6H (ORCPT ); Tue, 27 Mar 2007 12:58:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933388AbXC0Q6H (ORCPT ); Tue, 27 Mar 2007 12:58:07 -0400 Received: from science.horizon.com ([192.35.100.1]:13588 "HELO science.horizon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S933326AbXC0Q6F (ORCPT ); Tue, 27 Mar 2007 12:58:05 -0400 Date: 27 Mar 2007 12:58:02 -0400 Message-ID: <20070327165802.13160.qmail@science.horizon.com> From: linux@horizon.com To: jpiszcz@lucidpixels.com, linux@horizon.com Subject: Re: Why is NCQ enabled by default by libata? (2.6.20) Cc: htejun@gmail.com, jeff@garzik.org, linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > I meant you do not allocate the entire disk per raidset, which may alter > performance numbers. No, that would be silly. It does lower the average performance of the large RAID-5 area, but I don't know how ext3fs is allocating the blocks anyway, so > 04:00.0 RAID bus controller: Silicon Image, Inc. SiI 3132 Serial ATA Raid II Controller (rev 01) > I assume you mean 3132 right? Yes; did I mistype? 02:00.0 Mass storage controller: Silicon Image, Inc. SiI 3132 Serial ATA Raid II Controller (rev 01) 03:00.0 Mass storage controller: Silicon Image, Inc. SiI 3132 Serial ATA Raid II Controller (rev 01) 04:00.0 Mass storage controller: Silicon Image, Inc. SiI 3132 Serial ATA Raid II Controller (rev 01) > I also have 6 seagates, I'd need to run one > of these tests on them as well, also you took the micro jumper off the > Seagate 400s in the back as well right? Um... no, I don't remember doing anything like that. What micro jumper? It's been a while, but I just double-checked the drive manual and it doesn't mention any jumpers.