From owner-freebsd-current@FreeBSD.ORG Fri Jun 18 22:21:57 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 629A9106566B for ; Fri, 18 Jun 2010 22:21:57 +0000 (UTC) (envelope-from kraduk@googlemail.com) Received: from fg-out-1718.google.com (fg-out-1718.google.com [72.14.220.157]) by mx1.freebsd.org (Postfix) with ESMTP id E46108FC12 for ; Fri, 18 Jun 2010 22:21:56 +0000 (UTC) Received: by fg-out-1718.google.com with SMTP id l26so334180fgb.13 for ; Fri, 18 Jun 2010 15:21:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type; bh=KFQUIkLh9o3BcWJngSpbeOSG+M9//6YW6wYvemq+S4I=; b=qWBb83bhDFewbOHA36l5DNAX0I57bPMK/BVAR1lf7LxFZUBgbLLi64MuIx2lFz8nAv 5z9VCyoUL8aChICa3xIDNxAGNgFbV4vc7L6hw9Io0oDxvWKaFQ/6st6rsSVJfEY1c1Q0 lY9edDqeld8vZivIRtPYCFJLJyAA4EQa+6rCg= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=INQI0wAmLVjsQ+H8lOH0Fag4rdH7n+5n7K+vQ1dLucc4/drrfTwvLCf3d0oO13tzkm SzEMwyBAHzK7ThSb6cvu0OhP2tW2kNqMQHjbRzroHEgSlOehThf7BbKFR4CuPOeiOpNR s9+aeE65AgQ6L5rjTCWjRl3epU9Yjk3jCcX3k= MIME-Version: 1.0 Received: by 10.239.160.132 with SMTP id c4mr109545hbd.150.1276899715474; Fri, 18 Jun 2010 15:21:55 -0700 (PDT) Received: by 10.239.165.129 with HTTP; Fri, 18 Jun 2010 15:21:55 -0700 (PDT) In-Reply-To: <4C1B3792.9000007@freemail.hu> References: <4C1AB4C0.4020604@freemail.hu> <4C1B3792.9000007@freemail.hu> Date: Fri, 18 Jun 2010 23:21:55 +0100 Message-ID: From: krad To: oizs Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-current@freebsd.org 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: Fri, 18 Jun 2010 22:21:57 -0000 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