From owner-freebsd-stable@FreeBSD.ORG Mon Jun 1 05:45:12 2009 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 4A0EF1065673 for ; Mon, 1 Jun 2009 05:45:12 +0000 (UTC) (envelope-from uqs@spoerlein.net) Received: from acme.spoerlein.net (cl-43.dus-01.de.sixxs.net [IPv6:2a01:198:200:2a::2]) by mx1.freebsd.org (Postfix) with ESMTP id CFDD38FC34 for ; Mon, 1 Jun 2009 05:45:11 +0000 (UTC) (envelope-from uqs@spoerlein.net) Received: from acme.spoerlein.net (localhost.spoerlein.net [127.0.0.1]) by acme.spoerlein.net (8.14.3/8.14.3) with ESMTP id n515jAwe015171 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 1 Jun 2009 07:45:10 +0200 (CEST) (envelope-from uqs@spoerlein.net) Received: (from uqs@localhost) by acme.spoerlein.net (8.14.3/8.14.3/Submit) id n515jAeg015170; Mon, 1 Jun 2009 07:45:10 +0200 (CEST) (envelope-from uqs@spoerlein.net) Date: Mon, 1 Jun 2009 07:45:10 +0200 From: Ulrich =?utf-8?B?U3DDtnJsZWlu?= To: Dan Naumov Message-ID: <20090601054510.GH18676@acme.spoerlein.net> Mail-Followup-To: Dan Naumov , freebsd-stable@freebsd.org References: <20090531160533.GF18676@acme.spoerlein.net> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.5.19 (2009-01-05) Cc: freebsd-stable@freebsd.org Subject: Re: ZFS on top of GELI / Intel Atom 330 system 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: Mon, 01 Jun 2009 05:45:12 -0000 On Sun, 31.05.2009 at 19:28:51 +0300, Dan Naumov wrote: > Hi > > Since you are suggesting 2 x 8GB USB for a root partition, what is > your experience with read/write speed and lifetime expectation of > modern USB sticks under FreeBSD and why 2 of them, GEOM mirror? Well, my current setup is using an old 2GB CF card, so read/write speeds suck (14 and 7 MB/s, respectively, IIRC), but then again, there are not many actual read/writes on / or /usr for my setup anyway. The 2x 8GB USB sticks I would of course use to gmirror the setup, although I have been told that this is rather excessive. Modern flash media should cope with enough write cycles to get you through a decade. With /var being on GELI+ZFS this point is mood even more, IMHO. A recent 8GB Sandisk U3 stick of mine manages to read/write ~25MB/s (working from memory here), so this is pretty much the maximum USB 2.0 is giving you. Cheers, Ulrich Spörlein -- http://www.dubistterrorist.de/