From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933783AbXC0RDG (ORCPT ); Tue, 27 Mar 2007 13:03:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933761AbXC0RDF (ORCPT ); Tue, 27 Mar 2007 13:03:05 -0400 Received: from lucidpixels.com ([75.144.35.66]:59604 "EHLO lucidpixels.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933688AbXC0RDE (ORCPT ); Tue, 27 Mar 2007 13:03:04 -0400 Date: Tue, 27 Mar 2007 13:03:02 -0400 (EDT) From: Justin Piszcz X-X-Sender: jpiszcz@p34.internal.lan To: linux@horizon.com cc: htejun@gmail.com, jeff@garzik.org, linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: Why is NCQ enabled by default by libata? (2.6.20) In-Reply-To: <20070327165802.13160.qmail@science.horizon.com> Message-ID: References: <20070327165802.13160.qmail@science.horizon.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 27 Mar 2007, linux@horizon.com wrote: >> 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. > The 7200.8's don't use a jumper except for "factory use" - the 7200.9s and 10s I believe have a jumper in the back to enable/disable 3.0GBps operation. Your model # corresponds with a 7200.8, so nevermind about the jumper. Justin.