From owner-freebsd-current@FreeBSD.ORG Sat Jun 19 00:27:17 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 2D6601065670 for ; Sat, 19 Jun 2010 00:27:17 +0000 (UTC) (envelope-from oizs@freemail.hu) Received: from fep15.mx.upcmail.net (fep15.mx.upcmail.net [62.179.121.35]) by mx1.freebsd.org (Postfix) with ESMTP id 7CA678FC0C for ; Sat, 19 Jun 2010 00:27:15 +0000 (UTC) Received: from edge04.upcmail.net ([192.168.13.239]) by viefep15-int.chello.at (InterMail vM.8.01.02.02 201-2260-120-106-20100312) with ESMTP id <20100619002714.DUHX21071.viefep15-int.chello.at@edge04.upcmail.net> for ; Sat, 19 Jun 2010 02:27:14 +0200 Received: from [192.168.0.6] ([213.222.167.104]) by edge04.upcmail.net with edge id XcTC1e04b2FUr7104cTEcU; Sat, 19 Jun 2010 02:27:14 +0200 X-SourceIP: 213.222.167.104 Message-ID: <4C1C0ED9.8090103@freemail.hu> Date: Sat, 19 Jun 2010 02:27:05 +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> <4C1B3792.9000007@freemail.hu> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Cloudmark-Analysis: v=1.1 cv=BX1z5e3lS7RAKjOkUI/uDpZ/pP4xz0N/VImyOZX9Sfk= c=1 sm=0 a=q8OS1GolVHwA:10 a=8nJEP1OIZ-IA:10 a=6I5d2MoRAAAA:8 a=WKDJjGGMSlmJLsMjeWkA:9 a=FvaffqHDPILdG-ScY0oA:7 a=qSpVFLIrDjT1hlPIIFlRcyAcjd4A: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 00:27:17 -0000 Im using the Samsung F3 disks, which can do 140MB/s sequentially. I have tried different raids raid0 will do just as bad as raid5. I even tried one disk which performed as expected 100MB/s+ reads and writes so I'm not sure anymore what could be the problem. Maybe the controller hates samsung disks? -zsozso On 2010.06.19. 0:21, krad wrote: > On 18 June 2010 10:08, oizs wrote: > > >> I've seen people with the same configuration doing 160MB/s writes and >> 250MB/s+ reads with raid5 so I still think something isn't right. And using >> raid10 with 4 disks is a rather large waste of capacity. >> >> -zsozso >> >> >> On 2010.06.18. 1:55, Chuck Swiger wrote: >> >> >>> On Jun 17, 2010, at 4:50 PM, oizs wrote: >>> >>> >>> >>>> 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) >>>> >>>> >>>> >>> Switch to using RAID-10 rather than RAID-5. It's normal for RAID-5 to >>> have worse write performance than that of a single drive. >>> >>> Regards, >>> >>> >>> >> _______________________________________________ >> freebsd-current@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-current >> To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" >> >> > what are your drives though? Are they SATA green/eco type drives or proper > SAS enterprise ones > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" > > >