From owner-freebsd-current@FreeBSD.ORG Sat Jun 19 09:07:32 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 11FB01065670 for ; Sat, 19 Jun 2010 09:07:31 +0000 (UTC) (envelope-from svein-listmail@stillbilde.net) Received: from mail.stillbilde.net (unknown [IPv6:2002:51af:3dc3:0:20c:29ff:fece:79f3]) by mx1.freebsd.org (Postfix) with ESMTP id 79D108FC0A for ; Sat, 19 Jun 2010 09:07:31 +0000 (UTC) Received: from [IPv6:2002:51af:3dc3:0:19f4:72db:b8ac:23a] (unknown [IPv6:2002:51af:3dc3:0:19f4:72db:b8ac:23a]) (Authenticated sender: svein-listmail) by mail.stillbilde.net (Familien Skogens mail) with ESMTPSA id 10A0B7C for ; Sat, 19 Jun 2010 11:07:45 +0200 (CEST) Message-ID: <4C1C88CD.3000506@stillbilde.net> Date: Sat, 19 Jun 2010 11:07:25 +0200 From: "Svein Skogen (Listmail Account)" User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.10) Gecko/20100512 Lightning/1.0b1 Thunderbird/3.0.5 MIME-Version: 1.0 To: freebsd-current@freebsd.org References: <4C1AB4C0.4020604@freemail.hu> In-Reply-To: <4C1AB4C0.4020604@freemail.hu> X-Enigmail-Version: 1.0.1 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig42F10D6CA89CBAA2908658F2" 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 09:07:32 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig42F10D6CA89CBAA2908658F2 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 18.06.2010 01:50, oizs wrote: > Hi, >=20 > 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. >=20 > 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) >=20 > As far as I know this controller should be as fast as on other systems.= > (Freebsd.org mx1 has one of these cards.) >=20 > 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 --=20 --------+-------------------+------------------------------- /"\ |Svein Skogen | svein@d80.iso100.no \ / |Solberg =D8stli 9 | PGP Key: 0xE5E76831 X |2020 Skedsmokorset | svein@jernhuset.no / \ |Norway | PGP Key: 0xCE96CE13 | | svein@stillbilde.net ascii | | PGP Key: 0x58CD33B6 ribbon |System Admin | svein-listmail@stillbilde.net Campaign|stillbilde.net | PGP Key: 0x22D494A4 +-------------------+------------------------------- |msn messenger: | Mobile Phone: +47 907 03 575 |svein@jernhuset.no | RIPE handle: SS16503-RIPE --------+-------------------+------------------------------- If you really are in a hurry, mail me at svein-mobile@stillbilde.net This mailbox goes directly to my cellphone and is checked even when I'm not in front of my computer. ------------------------------------------------------------ Picture Gallery: https://gallery.stillbilde.net/v/svein/ ------------------------------------------------------------ --------------enig42F10D6CA89CBAA2908658F2 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (MingW32) iEYEARECAAYFAkwciNEACgkQODUnwSLUlKSKvwCfUbpJGbWsjHONYeh3oUuBfRm5 +LkAn3vz/ahFyr01eF+wgz0tRSqmO85G =OSIK -----END PGP SIGNATURE----- --------------enig42F10D6CA89CBAA2908658F2--