[ltp] How does /proc/acpi/ibm/bay work

[Nils]

This is really interesting, which kernel version do you use ?
I boot my thinkpad with an ultrabay battery and then I try to use a dvd-rom, 
but I have no success with enabling dma.
Can you try to boot your thinkpad without the DVD-RW drive and then after 
inserting the DVD-RW drive try to enable dma ?
(you can also boot with a second battery, but not everybody has this 
possibility)
Thanks,
Nils

Am Freitag, 1. April 2005 18:27 schrieb Tony Whitmore:
> Stefan Schmidt wrote:
> > Hello.
> >
> > On Thu, Mar 31, 2005 at 08:49:30AM -0500, Theodore Ts'o wrote:
> >>I can swap my DVD/CD-RW drive, as well as an additional IDE hard
> >>drive.
> >
> > Do you can use DMA after re-insert the DVD/CD-RW drive?
>
> Yes. I disable it before I remove the drive and re-enable it after
> inserting. "hdparm -d" reports it as being on.
>
> I should perhaps test the validity of this by trying to play back a DVD
> (which struggles without DMA on.)
>
> Tony