From owner-freebsd-hackers@FreeBSD.ORG Wed Aug 15 09:18:04 2007 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 68F9E16A418 for ; Wed, 15 Aug 2007 09:18:04 +0000 (UTC) (envelope-from des@des.no) Received: from tim.des.no (tim.des.no [194.63.250.121]) by mx1.freebsd.org (Postfix) with ESMTP id 23D8F13C457 for ; Wed, 15 Aug 2007 09:18:03 +0000 (UTC) (envelope-from des@des.no) Received: from tim.des.no (localhost [127.0.0.1]) by spam.des.no (Postfix) with ESMTP id 94C1120B0; Wed, 15 Aug 2007 11:18:00 +0200 (CEST) X-Spam-Tests: AWL X-Spam-Learn: disabled X-Spam-Score: 0.0/3.0 X-Spam-Checker-Version: SpamAssassin 3.2.1 (2007-05-02) on tim.des.no Received: from ds4.des.no (des.no [80.203.243.180]) by smtp.des.no (Postfix) with ESMTP id E82BC208A; Wed, 15 Aug 2007 11:17:59 +0200 (CEST) Received: by ds4.des.no (Postfix, from userid 1001) id BD3DB8444A; Wed, 15 Aug 2007 11:17:59 +0200 (CEST) From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= To: Simon 'corecode' Schubert References: <07081411265549.-1077952816@somehost.domainz.com> <20070814030833.49a7a030@soralx> <20070814041736.4c16f41e@soralx> <07081416114656.-1077948560@somehost.domainz.com> <86r6m5231w.fsf@ds4.des.no> <46C2B709.20604@fs.ei.tum.de> Date: Wed, 15 Aug 2007 11:17:59 +0200 In-Reply-To: <46C2B709.20604@fs.ei.tum.de> (Simon Schubert's message of "Wed\, 15 Aug 2007 10\:19\:21 +0200") Message-ID: <86fy2lgnqw.fsf@ds4.des.no> User-Agent: Gnus/5.110006 (No Gnus v0.6) Emacs/22.1 (berkeley-unix) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Cc: freebsd-hackers@freebsd.org, Sven Hazejager Subject: Re: How to stop attached USB device / send IRP_MN_REMOVE_DEVICE? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 15 Aug 2007 09:18:04 -0000 Simon 'corecode' Schubert writes: > Dag-Erling Sm=C3=B8rgrav writes: > > All modern disks (since at least the early 1990s) automatically park > > their heads when they lose power. There is no need to do it in > > software. > So it seems that windows is switching off the power of the devices > when you select "eject". I can see that some users might feel more > comfortable with this behaviour. Yes, if only because it saves power and reduces noise (for USB-attached mechanical drives at least). Note that this also requires logic in the enclosure to cut power to the drive when the device is detached; not all enclosures do this. Brand name drives (Maxtor OneTouch, Western Digital Passport etc.) usually do, while cheap DIY enclosures usually don't. DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no