From owner-freebsd-questions@FreeBSD.ORG Sun Nov 15 18:21:52 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 8D22E106568F for ; Sun, 15 Nov 2009 18:21:52 +0000 (UTC) (envelope-from anti_spam256@yahoo.ca) Received: from web65508.mail.ac4.yahoo.com (web65508.mail.ac4.yahoo.com [76.13.9.52]) by mx1.freebsd.org (Postfix) with SMTP id 3A16C8FC0A for ; Sun, 15 Nov 2009 18:21:51 +0000 (UTC) Received: (qmail 86191 invoked by uid 60001); 15 Nov 2009 18:21:51 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.ca; s=s1024; t=1258309311; bh=3vtqYEYiOISmEPQzqzQu+7mD7dYZQIRIX6JfA7Qx7+g=; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:Cc:In-Reply-To:MIME-Version:Content-Type; b=q/JqJ9yjqsYPBahlHGz+YSGCuHjCf11JozXok241y2xRcMNYblYoW6TPErzTJ9geXzUN/Gkq5D7vQZXrnUrjAdQBkq+w8rlVYBsg3laLT7Q09U/7vdKFmqroshecowbAEZC6sVLOxwnS/11s5fnbudFL4SMlG1HR1kMvKhRYOzQ= DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.ca; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:Cc:In-Reply-To:MIME-Version:Content-Type; b=mbLKsntaCo98txkEIW99xR69ker38XDEuMccUZcBgU4Qeti0iK6THXOmopkRLuCIx3uyluxgtvUkE6nwmf7yszBgWk9dJ4nTMZy2kFK4uwzxSEK+1YnUn+ekOF0J91KevKQQ1mVLiO2LvH0YFCXVTMUgAwwpbmawo6GnknTyTkU=; Message-ID: <393905.86009.qm@web65508.mail.ac4.yahoo.com> X-YMail-OSG: ih0ZnxgVM1ni2eU_D_rCyaQMTrX4wtOjRyoaTYdfCT4FOhTac8aVjGGblzBdlLTao32eJlFttvbaP2a4ouHkDTNafC.QDEB5L0OdIs3Dsit6jFmy2ornGDqphQ6VXSjUdHZKVG.7FbN8LhS6Y2BHv_.ch9IVRglJr4DEqzc1JgS9LyvDpJt1k1aDFiQlBlZfetEkleyRRwuvVIBSi14pCg9a4EUS8WF_FBBI4JNW19vw1LN8qNgAlW.2ELXGQJ5HWE7mjSxSbcr3W74BmkQp.JWVe1oelWlmSEgYlyg5cp5sdrURQH1XmFQZheW3mAvlR2lXxIkU5W5xaI92yeSU4DuWrS4GtfB3npasP.97NPVOkDaV79nqaVPfjq.VzP_wuokl_T_7X6uG_8tBtnNlLOnxBu4LuBfisPKnt_BOqGioCzJR9fbhC6sM6.Q63yrVA6ySy._Cflm77Tyf3jvNsDGEI9a43g0cqs1gnu3dZ.EHrH4AtxfT8JqRmxr22IY8sHZ2sNJ2JW8Xl0tdBM2nMwG97neWtFNI Received: from [208.99.137.71] by web65508.mail.ac4.yahoo.com via HTTP; Sun, 15 Nov 2009 10:21:51 PST X-Mailer: YahooMailClassic/8.1.6 YahooMailWebService/0.7.361.4 Date: Sun, 15 Nov 2009 10:21:51 -0800 (PST) From: James Phillips To: freebsd-questions@freebsd.org In-Reply-To: <20091115120013.145771065724@hub.freebsd.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: CyberLeo Subject: Re: freebsd-questions Digest, Vol 284, Issue 11 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 15 Nov 2009 18:21:52 -0000 > Date: Sat, 14 Nov 2009 20:29:59 -0600 > From: CyberLeo Kitsana > Subject: [FreeBSD Questions] Filesystem image as root > To: FreeBSD Questions > Cc: CyberLeo > Message-ID: <4AFF67A7.6040109@cyberleo.net> > Content-Type: text/plain; charset=ISO-8859-1 > > I have been thinking and experimenting for weeks, but I > cannot figure > this out. > > I have an Intel SS4200 NAS that I wish to use as a ZFS NAS > with FreeBSD 8.0. > > The device has 4 SATA bays, and I don't want to use one for > a UFS root disk. > > I don't want to use up hundreds of megabytes of RAM > preloading an > mfsroot that can never shrink. > > The single IDE connector is accessible via the legacy ISA > ports, and is > thus limited to PIO modes (about 1.6MB/sec max, even with > an actual hard > drive instead of a CF card). You are off by an order of magnitude (base 2 or 10): Pio mode 0 is ~3.3 MB/s Pio mode 4 is ~16.7 MB/s http://www.pcguide.com/ref/hdd/if/ide/modesPIO-c.html You can probably set PIO mode 4 for with: # atacontrol mode ad0 PIO4 I am currently using ~ 159MB on my root partition, At 16.7MB/s that is a 10 second load time; and as you said, frequently used files will be cached. (I have a CF card that has 15MB/s symmetric read/write. Don't know how special it is.) With a CF card there should be no seek delay of ~ 10 ms (for reads anyway, deleting blocks probably takes 10ms). Regards, James Phillips My summary: maybe you are trying too hard :) __________________________________________________________________ Yahoo! Canada Toolbar: Search from anywhere on the web, and bookmark your favourite sites. Download it now http://ca.toolbar.yahoo.com.