From owner-freebsd-stable@FreeBSD.ORG Thu Jan 29 11:44:08 2009 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BF737106564A for ; Thu, 29 Jan 2009 11:44:08 +0000 (UTC) (envelope-from richardtector@thekeelecentre.com) Received: from mx0.thekeelecentre.com (mx0.thekeelecentre.com [IPv6:2001:470:1f09:16f:2::3]) by mx1.freebsd.org (Postfix) with ESMTP id 4B96E8FC1B for ; Thu, 29 Jan 2009 11:44:08 +0000 (UTC) (envelope-from richardtector@thekeelecentre.com) Received: from localhost (filter.mx0.thekeelecentre.com [217.206.238.165]) by mx0.thekeelecentre.com (Postfix) with ESMTP id 509C945033; Thu, 29 Jan 2009 11:44:07 +0000 (GMT) X-Virus-Scanned: amavisd-new at thekeelecentre.com Received: from mx0.thekeelecentre.com ([217.206.238.167]) by localhost (filter.mx0.thekeelecentre.com [217.206.238.165]) (amavisd-new, port 10024) with ESMTP id sB2Yr2wPniWy; Thu, 29 Jan 2009 11:44:05 +0000 (UTC) Received: from [10.0.2.11] (daffy.tector.org.uk [82.71.32.9]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx0.thekeelecentre.com (Postfix) with ESMTPSA id BCEC145025; Thu, 29 Jan 2009 11:44:04 +0000 (GMT) Message-ID: <49819672.1090208@thekeelecentre.com> Date: Thu, 29 Jan 2009 11:43:46 +0000 From: Richard Tector User-Agent: Thunderbird 2.0.0.19 (Windows/20081209) MIME-Version: 1.0 To: Charles Sprickman References: In-Reply-To: Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=sha1; boundary="------------ms020309030602020206020908" Cc: freebsd-stable@freebsd.org Subject: Re: 7.1, mpt and slow writes X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 Jan 2009 11:44:09 -0000 This is a cryptographically signed message in MIME format. --------------ms020309030602020206020908 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Charles Sprickman wrote: > Hello, > > I think this needs a few more eyes: > > http://lists.freebsd.org/pipermail/freebsd-scsi/2009-January/003782.html > > In short, writes are slow, likely do to the write-cache being enabled on > the controller. The sysctl used in 6.x to turn the cache off don't seem > to be in 7.x. I have two Dell 860's here also running 7.1-REL. A simple dd on one shows roughly 60MB/s writes to a mirror of 2 320GB disks on what I'm assuming is the same LSI controller card (SAS5) richard@moses:~# cat /boot/loader.conf hw.mpt.enable_sata_wc=1 Seems to work just fine for me. 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