I have a system running netbsd (macppc-current, if that's relevant).  One of
the IDE channels is attached to a removable hard drive sled.  It's the
"InClose Mobile Dock":

http://www.westec-net.com/products/MobileDocks/MobileDocks.html

Removing the drive without powering down the machine works, but any attempts
to access that device afterwards seem to really irritate the pciide driver.
A couple of minutes and several console messages later, it gives up on the
drive and things start working again.

How difficult would it be to add real support for hot-swap in the pciide
driver?  I expect there would be limitations (probably only one drive per
channel, etc.), but would it be possible to make it work?

Just curious,
-- monroe
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Monroe Williams                                  monroe@criticalpath.com