From owner-freebsd-current@FreeBSD.ORG Sat Jun 19 09:58:56 2010 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id F21C6106564A for ; Sat, 19 Jun 2010 09:58:56 +0000 (UTC) (envelope-from oizs@freemail.hu) Received: from fep14.mx.upcmail.net (fep14.mx.upcmail.net [62.179.121.34]) by mx1.freebsd.org (Postfix) with ESMTP id 3969A8FC1B for ; Sat, 19 Jun 2010 09:58:55 +0000 (UTC) Received: from edge01.upcmail.net ([192.168.13.236]) by viefep14-int.chello.at (InterMail vM.8.01.02.02 201-2260-120-106-20100312) with ESMTP id <20100619095854.SJSM8381.viefep14-int.chello.at@edge01.upcmail.net> for ; Sat, 19 Jun 2010 11:58:54 +0200 Received: from [192.168.0.6] ([213.222.167.104]) by edge01.upcmail.net with edge id Xlys1e08W2FUr7101lytQE; Sat, 19 Jun 2010 11:58:54 +0200 X-SourceIP: 213.222.167.104 Message-ID: <4C1C94D4.7040302@freemail.hu> Date: Sat, 19 Jun 2010 11:58:44 +0200 From: oizs User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.10) Gecko/20100512 Thunderbird/3.0.5 MIME-Version: 1.0 To: freebsd-current@freebsd.org References: <4C1AB4C0.4020604@freemail.hu> <4C1C88CD.3000506@stillbilde.net> In-Reply-To: <4C1C88CD.3000506@stillbilde.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Cloudmark-Analysis: v=1.1 cv=M71sKKeyFebLYdq5hFNIGMR02ATQkL1qNhm49ttUYSY= c=1 sm=0 a=q8OS1GolVHwA:10 a=8nJEP1OIZ-IA:10 a=6I5d2MoRAAAA:8 a=LqlliF7G4zm9AMZb3lIA:9 a=ixs2dUwmwN7ia3oIe1u0jbMYLDUA:4 a=wPNLvfGTeEIA:10 a=SV7veod9ZcQA:10 a=HpAAvcLHHh0Zw7uRqdWCyQ==:117 Subject: Re: Dell Perc 5/i Performance issues X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 19 Jun 2010 09:58:57 -0000 I tried almost everything raid 0 1 5 10 with all kind of stripes 32/64/128 and settings direct io/cached/read-ahead/wt/wb/disk-cache but nothing seems to work. I changed the card to another dell perc 5 which had an older firmware. Tried 4 kind of motherboards even tried changing the os to linux and windows xp/7. In windows I got some funny results 1.3MB/s with write-back and 150MB/s reads with 5 disks in raid0. I just wanted to have a hw raid with no problems since the motherboard 88sx7042 and bsd did not like eachother. -zsozso On 2010.06.19. 11:07, Svein Skogen (Listmail Account) wrote: > On 18.06.2010 01:50, oizs wrote: > >> Hi, >> >> I've bought a Dell Perc 5/i because I couldn't make the onboard marvell >> 88sx7042 work with 8.0/8.1 or current, but as lucky as I am, the best I >> can do with 4x1.5tb samsung in raid5 is 60MB/s writes and 90MB/s reads, >> with bbu/write-back/adaptive-read-ahead. >> >> I was expecting at least twice of that, and I'm not sure what can I do >> to get that speed. (I've read man 7 tuning with no success) >> >> As far as I know this controller should be as fast as on other systems. >> (Freebsd.org mx1 has one of these cards.) >> >> I'm hoping somebody on the list reads this and helps because I can't >> afford to buy another card. >> > I've lost track of what actual boards Dell has OEMized to make the > various PERCs, but if I remember somewhat correctly, the PERC5 is > basically an LSI Megaraid SAS 8308elp with different labels and firmware? > > If so, I've got that exact controller (minus the dell labels and > firmware) in my primary storage box here, and yes, you SHOULD be able to > get more performance out of it. What's your strip sizes and logical disk > layout? > > (I've got the same board running on 8x 1T5 Seagates in RAID5+0, and that > setup easily pulls 5 times the values you're seeing, and by all logic > you should see about half of what I'm seeing) > > //Svein > >