From owner-freebsd-firewire@FreeBSD.ORG Thu Sep 21 12:58:46 2006 Return-Path: X-Original-To: freebsd-firewire@freebsd.org Delivered-To: freebsd-firewire@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 497F016A403 for ; Thu, 21 Sep 2006 12:58:46 +0000 (UTC) (envelope-from mldodson@houston.rr.com) Received: from ms-smtp-02.texas.rr.com (ms-smtp-02.texas.rr.com [24.93.47.41]) by mx1.FreeBSD.org (Postfix) with ESMTP id A2CC443D53 for ; Thu, 21 Sep 2006 12:58:45 +0000 (GMT) (envelope-from mldodson@houston.rr.com) Received: from localhost.houston.rr.com (cpe-24-167-77-130.houston.res.rr.com [24.167.77.130]) by ms-smtp-02.texas.rr.com (8.13.6/8.13.6) with ESMTP id k8LCwghd023934; Thu, 21 Sep 2006 07:58:43 -0500 (CDT) Received: from localhost (localhost [[UNIX: localhost]]) by localhost.houston.rr.com (8.13.8/8.13.6/Submit) id k8LCwaMZ008381; Thu, 21 Sep 2006 07:58:36 -0500 (CDT) (envelope-from mldodson@houston.rr.com) X-Authentication-Warning: localhost.houston.rr.com: bdodson set sender to mldodson@houston.rr.com using -f From: "M. L. Dodson" To: John-Mark Gurney Date: Thu, 21 Sep 2006 07:58:36 -0500 User-Agent: KMail/1.9.4 References: <200609191005.17015.mldodson@houston.rr.com> <4511FF85.1000102@centtech.com> <20060921040355.GM23915@funkthat.com> In-Reply-To: <20060921040355.GM23915@funkthat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200609210758.36433.mldodson@houston.rr.com> X-Virus-Scanned: Symantec AntiVirus Scan Engine Cc: freebsd-firewire@freebsd.org Subject: Re: devfs and hot unplugging firewire device X-BeenThere: freebsd-firewire@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: mldodson@houston.rr.com List-Id: Firewire support in FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 Sep 2006 12:58:46 -0000 On Wednesday 20 September 2006 23:03, John-Mark Gurney wrote: > Eric Anderson wrote this message on Wed, Sep 20, 2006 at 21:57 -0500: > > On 09/20/06 15:16, M. L. Dodson wrote: > > >On Wednesday 20 September 2006 14:42, John-Mark Gurney wrote: > > >>M. L. Dodson wrote this message on Wed, Sep 20, 2006 at 14:14 -0500: > > >>>More experimental results on firewire disks and hot unplugging: > > >>> > > >>>Transcripts of two sessions can be retrieved from > > >>>http://siegfried.utmb.edu/bdodson/firewire.on.histidine.txt and > > >>>http://siegfried.utmb.edu/bdodson/firewire.on.serine.txt > > >> > > >>doh, I think I know what your problem is... you need to do three > > >>or so fwcontrol -r's before the device will disappear... This is > > >>necessary, since each plug causes a rescan, and you don't want > > >> devices disappearing when you add your cd drive... It looks like > > >> adding a timeout would be a good thing to the device orphan... If > > >> the device has been orphaned for more than a minute, drop it, or > > >> three or so resets... > > > > > >That worked. Thanks again! > > > > It's too bad firewire doesn't act more like USB storage in this case - > > you can yank and plug in the same or similar storage using the same > > adapter many many times without issue - I've done this many times. > And that is the behaviour I expected. I did not appreciate the differences between a chain and a tree. I'm a scientist, but not a computer scientist. I have been somewhat verbose in these emails to document my experiences for the archives. Thanks to you all. > USB is a tree w/ hubs... If you have a chain of devices, and need to > pull one in the middle, you'd loose the end devices if firewire > behaved this way... > > /me notes that each have their advantages and disadvantages. -- M. L. Dodson Email: mldodson-at-houston-dot-rr-dot-com Phone: eight_three_two-56_three-386_one