From owner-freebsd-questions@FreeBSD.ORG Mon Apr 18 18:19:23 2011 Return-Path: Delivered-To: questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 78CBF1065672 for ; Mon, 18 Apr 2011 18:19:23 +0000 (UTC) (envelope-from crwhipp@gmail.com) Received: from mail-pz0-f54.google.com (mail-pz0-f54.google.com [209.85.210.54]) by mx1.freebsd.org (Postfix) with ESMTP id 43EF38FC17 for ; Mon, 18 Apr 2011 18:19:23 +0000 (UTC) Received: by pzk27 with SMTP id 27so2863943pzk.13 for ; Mon, 18 Apr 2011 11:19:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:date:from:to:cc:subject:message-id:references :mime-version:content-type:content-disposition:in-reply-to :user-agent:x-draft-info:x-sender; bh=IQxB8zPZYnVjbgdqpqMduleCisG8wo3QrfuKqCorsng=; b=BUjTb0PzS29l4bnGlxqmXXl902/V+tEXCbgzSWl1kc2hxKGrhu3uMSsCpTHJSF0OH2 LoMo3FGHXTMXHuoVukwYno1f0rsoUdDCfxSms3T7n/CrVMtGd2FCiXIG2uZGN37IZ6b6 bVFVDCI4WFwLBfwavcvvYRGr68/G930tsCqUc= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent :x-draft-info:x-sender; b=qdiCNtA60ymJNjeZZjBseoyK3ws1QzVUsWR9VSY928vCHjTva3tdI8BumEHjfKE16V oUguVE44kgeNpHHagkTLowi8PQYvUjTGzDv1/pk+SZsz+NDOXSLsMwXCrzQ0pjDMOdEC fg9ry3vaP8/kZ1336EosQzar3VqqsUyND8a40= Received: by 10.68.46.104 with SMTP id u8mr7205448pbm.276.1303149073919; Mon, 18 Apr 2011 10:51:13 -0700 (PDT) Received: from localhost (71-223-231-130.phnx.qwest.net [71.223.231.130]) by mx.google.com with ESMTPS id t7sm2429814pbh.30.2011.04.18.10.51.11 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 18 Apr 2011 10:51:12 -0700 (PDT) Date: Mon, 18 Apr 2011 10:51:10 -0700 From: Craig Whipp To: Gautham Ganapathy Message-ID: <20110418175110.GA90485@revo.domain.actdsltmp> References: Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="cNdxnHkX5QqsyA0e" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.3i X-Draft-Info: type=reply; uid=4384; folder=ZnJlZWJzZF9xdWVzdGlvbnM= X-Sender: crwhipp@gmail.com Cc: questions@freebsd.org Subject: Re: ZFS on USB / Sound on alienware m11x 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: Mon, 18 Apr 2011 18:19:23 -0000 --cNdxnHkX5QqsyA0e Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, 18 Apr 2011 16:58:28 +0000, Gautham Ganapathy wrote: > Hi > > I am trying out FreeBSD on ZFS using the PC-BSD 8.2 installer. I have > it installed on a Western Digital USB HDD connected to an Alienware > m11x laptop. It seems to work well except that once in a while, any > application performing a write freezes for a few seconds (around 15=20 > or > so) and looking at top shows their states to be in zio. Is this > because it was installed on a USB drive? > I've experienced the same behavior on my external USB WD drive. I found that many of the Western Digital external drives will spin-down after some period of time. The wait you're experiencing is probably the time it takes to spin-up. WD has a utility to disable the spin-down feature. It's windows only, however. http://support.wdc.com/product/download.asp?groupid=3D304&sid=3D17&lang=3D= en - Craig --cNdxnHkX5QqsyA0e Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (FreeBSD) iQEcBAEBAgAGBQJNrHoOAAoJEKpOrBlBNtKl3VkIANKHxyaffy5n6jpJU4EgQDPl ydFosgRhpeXx5lLeXn4BWQD5e/YZZ8h988rQJ99z1aqhVjMh8ml9ABrBUKvVuy8k IaTYKH2HW/8ejkGRd+P86iuAGL/7mgYVm0wmm5OPr6l4XyATs/wkoqguDz0MHz6B yCdek1tiD/Y5bMlR67dCS+IAaEy6xQ+4GwXgKckzWrBzkBfe+NKOIQ6oCEOkxqOb vzp2q2+9Li9pzdH6H9pYR7eN/C6DpTA+7hE54mJUHUBKJ7WPFetIBrMpbHorK+B2 ekmtG26wQ4/lBunIc3D6wCIUeM7Rc6uQbLM20LFR8zVTIsG524cGPoTcLAk4hMA= =lY89 -----END PGP SIGNATURE----- --cNdxnHkX5QqsyA0e--