From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: with ECARTIS (v1.0.0; list xfs); Wed, 27 Jun 2007 22:08:58 -0700 (PDT) Received: from larry.melbourne.sgi.com (larry.melbourne.sgi.com [134.14.52.130]) by oss.sgi.com (8.12.10/8.12.10/SuSE Linux 0.7) with SMTP id l5S58otL004645 for ; Wed, 27 Jun 2007 22:08:52 -0700 Date: Thu, 28 Jun 2007 15:08:37 +1000 From: David Chinner Subject: Re: Fastest Chunk Size w/XFS For MD Software RAID = 1024k Message-ID: <20070628050837.GG989688@sgi.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: xfs-bounce@oss.sgi.com Errors-to: xfs-bounce@oss.sgi.com List-Id: xfs To: Justin Piszcz Cc: linux-raid@vger.kernel.org, xfs@oss.sgi.com, Alan Piszcz On Wed, Jun 27, 2007 at 07:20:42PM -0400, Justin Piszcz wrote: > For drives with 16MB of cache (in this case, raptors). That's four (4) drives, right? If so, how do you get a block read rate of 578MB/s from 4 drives? That's 145MB/s per drive.... Cheers, Dave. -- Dave Chinner Principal Engineer SGI Australian Software Group