From owner-freebsd-stable@FreeBSD.ORG Wed Mar 28 03:18:43 2007 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 3D0A216A400 for ; Wed, 28 Mar 2007 03:18:43 +0000 (UTC) (envelope-from lydianconcepts@gmail.com) Received: from ug-out-1314.google.com (ug-out-1314.google.com [66.249.92.174]) by mx1.freebsd.org (Postfix) with ESMTP id C8CA513C45D for ; Wed, 28 Mar 2007 03:18:42 +0000 (UTC) (envelope-from lydianconcepts@gmail.com) Received: by ug-out-1314.google.com with SMTP id 71so84222ugh for ; Tue, 27 Mar 2007 20:18:41 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=t8ZDS5vp0y4WOqwHefkKoQf3wwaaaZ2YTvHNZxrtzInXr9YJpnj4wCbCRY4GMcFQIBMG4GpaHsBOtKf0GY9rUT2bIBV+sk+8k7l6L3mWfZFuSjuIGbd6xsSxTcgoC0ZuI/LefiTQa97uFpVugnGmWRh2MoxE9HLNML0Mm8FDD/0= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=onU8r7hSQLQC8dlRD0RIAjY9FbBNbNrab2NgeW6qG8oTQkHo/mOS6H4xuOgwsaTqivp1P+re80wP1e/qP+kyPxQoV7iReGp6lkCUAYbbPTYl+173p6BI1Uk7UdbYjEaWvfktmxgQzu0OQtw8IU9265jjPNZwyoa9NHO0fJZj1Dc= Received: by 10.114.174.2 with SMTP id w2mr3465536wae.1175051920539; Tue, 27 Mar 2007 20:18:40 -0700 (PDT) Received: by 10.114.24.2 with HTTP; Tue, 27 Mar 2007 20:18:40 -0700 (PDT) Message-ID: <7579f7fb0703272018i68983d5cvb9fe84c79cebd473@mail.gmail.com> Date: Tue, 27 Mar 2007 20:18:40 -0700 From: "Matthew Jacob" To: "Richard Tector" In-Reply-To: <46095CE5.5080600@thekeelecentre.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <460959E8.207@thekeelecentre.com> <7579f7fb0703271102q1a866897x2d63a86e72895125@mail.gmail.com> <46095CE5.5080600@thekeelecentre.com> Cc: freebsd-stable@freebsd.org Subject: Re: Dell SAS5 Performance Issue 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: Wed, 28 Mar 2007 03:18:43 -0000 not at the momeny- it's really that I won't have time until april On 3/27/07, Richard Tector wrote: > Matthew Jacob wrote: > > It's been seen before but the fix isn't know yet. > > > > On 3/27/07, Richard Tector wrote: > >> I'm suffering from very slow write performance on a Dell PowerEdge 860 > >> with the SAS5/IR controller (mpt driver) running either 6.2-RELEASE or > >> 6.2-STABLE with sources from yesterday. The controller hosts 2 Western > >> Digital 320GB SATA disks in a RAID1 configuration. > >> Reads approach 65MB/s however writes appear extremely slow, in the > >> region of 6-7MB/s with a dd and a blocksize of 1MB all the way down to > >> about 300KB/s while extracting a ports snapshot. > >> > >> It was suggested to me that perhaps write caching has been disabled on > >> the controller however no options exist within the BIOS configuration to > >> view/adjust *any* caching options. > >> > >> Has anyone else experienced this issue? If so how did they resolve it? > >> Also, is there any way to toggle the caching settings from FreeBSD? > >> > >> Regards, > >> > >> Richard Tector > >> _______________________________________________ > >> freebsd-stable@freebsd.org mailing list > >> http://lists.freebsd.org/mailman/listinfo/freebsd-stable > >> To unsubscribe, send any mail to > >> "freebsd-stable-unsubscribe@freebsd.org" > >> > Thank you for the quick reply. > Is there any information I could obtain that would be of use to you in > tracking this one down? > > Regards, > > Richard >