Date: Wed, 20 Sep 2006 21:03:55 -0700 From: John-Mark Gurney <gurney_j@resnet.uoregon.edu> To: Eric Anderson <anderson@centtech.com> Cc: freebsd-firewire@freebsd.org, mldodson@houston.rr.com Subject: Re: devfs and hot unplugging firewire device Message-ID: <20060921040355.GM23915@funkthat.com> In-Reply-To: <4511FF85.1000102@centtech.com> References: <200609191005.17015.mldodson@houston.rr.com> <200609201414.22322.mldodson@houston.rr.com> <20060920194236.GJ23915@funkthat.com> <200609201516.26497.mldodson@houston.rr.com> <4511FF85.1000102@centtech.com>
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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. 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. -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."
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