From owner-freebsd-scsi@FreeBSD.ORG Wed Dec 16 15:14:06 2009 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 359741065676 for ; Wed, 16 Dec 2009 15:14:06 +0000 (UTC) (envelope-from 000.fbsd@quip.cz) Received: from elsa.codelab.cz (elsa.codelab.cz [94.124.105.4]) by mx1.freebsd.org (Postfix) with ESMTP id E74078FC14 for ; Wed, 16 Dec 2009 15:14:05 +0000 (UTC) Received: from localhost (localhost.codelab.cz [127.0.0.1]) by elsa.codelab.cz (Postfix) with ESMTP id 0547319E044; Wed, 16 Dec 2009 15:57:30 +0100 (CET) Received: from [192.168.1.2] (r5bb235.net.upc.cz [86.49.61.235]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by elsa.codelab.cz (Postfix) with ESMTPSA id 65AA319E047; Wed, 16 Dec 2009 15:57:27 +0100 (CET) Message-ID: <4B28F557.6000305@quip.cz> Date: Wed, 16 Dec 2009 15:57:27 +0100 From: Miroslav Lachman <000.fbsd@quip.cz> User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.1.4) Gecko/20091017 SeaMonkey/2.0 MIME-Version: 1.0 To: Daniel Braniss References: <4B281279.6060706@quip.cz> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-scsi@freebsd.org, freebsd-stable Stable Subject: Re: iSCSI initiator and Dell PowerVault MD3000i X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Dec 2009 15:14:06 -0000 Daniel Braniss wrote: >> Hi all, >> I am playing with iscsi_initiator on FreeBSD 7-STABLE and Dell >> PowerVault MD3000i. This is the first time I am testing iSCSI... >> >> Does anyone have FreeBSD's iSCSI initiator in production / heavy load? >> Or does somebody have experiences with Dell MD3000i? >> >> One thing is "poor performance" ~ 60 - 70MB/s depending on RAID level >> used. (poor performance compared to plain SATA disk which have 110MB/s - >> both tested for reading as it is our planned load - multimedia streaming >> and downloads) >> >> >> The other thing is some problem with compatibility of initiator and Dell >> MD3000i. >> >> If I setup RAID 5 'Disk Group' consisted of 4x 1TB SATA drives (in >> MD3000i) and then created for example 2 'Virtual Disks', both are >> detected by iscontrol and added to /dev/ as da0 and da1, but da1 spams >> log with messages like this: [...] >> Can somebody advice some tweaks to get better performance and solution >> of the errors above? > > hi Miroslav, > firstly, in case you haven't yet, get the latest from: > ftp://ftp.cs.huji.ac.il/users/danny/freebsd/iscsi-2.2.3.tar.gz > the slowness is probably due to the scsi errors, which I need some scsi expert > (hence the cc to scsi@freebsd.org, hint, hint). > In the mean time, and if you can/want, you can allow me access to an iscsi > partition > so that I can better debug the issue. > oh, and yes, we use it here. > > danny Hi Danny, thank you for your reply. I will test iSCSI 2.2.3 and if it fails, I will give you an access to the machine to let you debug the errors. Thank you again! Miroslav Lachman