From owner-freebsd-hackers Thu Jan 2 2:47:14 2003 Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A915637B401 for ; Thu, 2 Jan 2003 02:47:13 -0800 (PST) Received: from mail.webjockey.net (mail.webjockey.net [208.141.46.3]) by mx1.FreeBSD.org (Postfix) with ESMTP id E528543EA9 for ; Thu, 2 Jan 2003 02:47:12 -0800 (PST) (envelope-from gary@outloud.org) Received: from ancient-iw4w1dr.outloud.org (wv-mrtnbrg-cmts1a-a-21.shphwv.adelphia.net [68.67.224.21]) by mail.webjockey.net (8.12.6/8.12.6) with ESMTP id h02Akw4u081090; Thu, 2 Jan 2003 05:46:59 -0500 (EST) (envelope-from gary@outloud.org) Message-Id: <5.2.0.9.2.20030102054201.027840f0@208.141.46.254> X-Sender: ancient@208.141.46.3 X-Mailer: QUALCOMM Windows Eudora Version 5.2.0.9 Date: Thu, 02 Jan 2003 05:48:08 -0500 To: "Sean Hamilton" , From: Gary Stanley Subject: Re: ATA RAID performance In-Reply-To: <000501c2b241$21927560$31dfe8d8@slugabed.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG >I have tried using both atacontrol and ccdconfig to create stripes and >mirrors of various sizes, and have found that in all cases, read performance >*decreased*. Have you formatted your filesystem to the correct fragment/blocksizes? This usually helps on raid controllers in conjunction with the correct stripe size. "man tuning" for more information. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message