Hot/Warm swap for laptop devices

[Noah Dain]

On Thu, 25 Nov 2004 07:39:45 +1000, Senectus . <senectus at gmail.com> wrote:
> On Wed, 24 Nov 2004 16:28:28 -0500, Brian Puccio <brian at brianpuccio.net> wrote:
> 
> 
> > On Wed, 2004-11-24 at 19:08 +0000, paul marwick wrote:
> > > I have a couple of IBM Thinkpads, a T20 and a T23. Both work well with
> > > Ubuntu. However, I'm wondering about support for swapping items in
> > > their swap bays - is it possible to (for instance), eject the DVD drive
> > > and replace it with the floppy without shutting down? If so, how does
> > > it need to be set up?
> >
> > I have an R51 (1836BDU to be exact) and removing the built-in
> > CD-RW/DVD-ROM causes the computer to hardlock.
> 
> are you unmounting it first?
> 
> --
> Ubuntu Warty 4.10
> 
> 
> 
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take a look in /usr/share/doc/hdparm/contrib , paritcularly the idectl script.

On my R40, I've had success with using idectl to prep the hotswap bay
and then yank out the cdrom and replace it with a battery.  I have
then been able to put the cdrom back in ( no need to prep the bay for
battery ejection ) and run idectl to re-activate the bay's ide-atapi
interface to bring the cdrom back online.

one caveate is that I have been unable to boot the machine with an
empty bay ( or with a battery ) and then get the cdrom working.

All this may also require tpctl and the thinkpad-modules compiled and
modprobed in.  I can't remember with 100% certaintly, but I do have
both installed here.

-- 
Noah Dain