devfs and hot unplugging firewire device

[John-Mark Gurney]

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...

Instead of fwcontrol -r, you can plug/unplug another device, and a
couple times will cause the device to fall off the bus..

Are you putting a different drive into the same enclosure?  If you
are, then the disk 'reappears', and apparently geom tastes w/ some
of the old info..  if you do: true > /dev/da4 it will force a retaste
and the bogus entries should go away...

-- 
  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."