From owner-freebsd-stable@FreeBSD.ORG Tue Feb 9 15:16:15 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B0E36106568D for ; Tue, 9 Feb 2010 15:16:15 +0000 (UTC) (envelope-from tevans.uk@googlemail.com) Received: from mail-ew0-f211.google.com (mail-ew0-f211.google.com [209.85.219.211]) by mx1.freebsd.org (Postfix) with ESMTP id 41EDC8FC0C for ; Tue, 9 Feb 2010 15:16:14 +0000 (UTC) Received: by ewy3 with SMTP id 3so4676200ewy.13 for ; Tue, 09 Feb 2010 07:16:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=NphJEjZcHKGqbOF4ClyNCPhHXPBe13PdLBhccs5VAvU=; b=FZBX6lNH59pUhpbBexr4hyRJNbPjjOxazVejB06HOJOkJMeBeRbNgG+fTwNwAZW1kR RZOCud0t/TrxchBNFGXWQBwL22j39x9rL8LqZ9zxuJ8Up4SN3tdd8ScAw8wUp9o6as1P 1hwce3c5Qh6TFZ4vg+XuhLbGFozPhrRg2+P0Y= 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:content-transfer-encoding; b=HcJsRRIHYZ34Q7EgrIj4PGAeWLQsAhEdfexdCsbv3CBtMSJfgzvacCt/WROQ8vWA9c KDEoyz7i5TQVo7FAdv/hrJ4Imb9hESIVWSFctkY86uPtkYhGirM6vZC3pa/5NuYVzwta 5TFUNKYBvq+ZOqIUeDqyHOuTvsMrFYjlmm4po= MIME-Version: 1.0 Received: by 10.213.44.3 with SMTP id y3mr2492640ebe.62.1265728573978; Tue, 09 Feb 2010 07:16:13 -0800 (PST) In-Reply-To: References: <4B6F9A8D.4050907@langille.org> <2e027be01002090451w2b4506a0ofb5ab55c647540a@mail.gmail.com> <2e027be01002090609y28be404dl1bb610d047b15f9b@mail.gmail.com> Date: Tue, 9 Feb 2010 15:16:13 +0000 Message-ID: <2e027be01002090716y77213c45pb937e22151a2c238@mail.gmail.com> From: Tom Evans To: Dan Langille Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Cc: Charles Sprickman , FreeBSD Stable Subject: Re: hardware for home use large storage X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Feb 2010 15:16:15 -0000 On Tue, Feb 9, 2010 at 3:01 PM, Dan Langille wrote: > > On Tue, February 9, 2010 9:09 am, Tom Evans wrote: >> On Tue, Feb 9, 2010 at 1:45 PM, Dan Langille wrote: >> One thing to point out about using a PM like this: you won't get >> fantastic bandwidth out of it. For my needs (home storage server), >> this really doesn't matter, I just want oodles of online storage, with >> redundancy and reliability. > > > A PM? =C2=A0What's that? > > Yes, my priority is reliable storage. =C2=A0Speed is secondary. > > What bandwidth are you getting? > PM =3D Port Multiplier I'm getting disk speed, as I only have one device behind the PM currently (just making sure it works properly :). The limits are that the link from siis to the PM is SATA (3Gb/s, 375MB/s), and the siis sits on a PCIe 1x bus (2Gb/s, 250 MB/s), so the bandwidth from that is shared amongst the up-to 5 disks behind the PM. Writing from /dev/zero to the pool, I get around 120MB/s. Reading from the pool, and writing to /dev/null, I get around 170 MB/s. Cheers Tom