 | | | HDIO_SET_DMA failed: Operation not permitted | HDIO_SET_DMA failed: Operation not permitted 2006-01-31 - By Biswajit Nayak
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Thanks a lot. I switced the machine to Windows. I will
try to reinstall linux and try to fix the DMA issue.
Biswajit
--- Andrew Bowden <Andrew.Bowden@(protected)>
wrote:
> > On Fri, 2006-01-27 at 17:49 -0800, Biswajit Nayak
> wrote:
> > > No I do not think i did with nodma . Here is the
> > > output of
> > >
> > > [root@(protected) ocsperf]# cat /proc/cmdline
> > > ro root=/dev/VolGroup00/LogVol00 rhgb quiet
> >
> > Ok, so you didn't disable DMA there. You are,
> however, using LVM.
> > Are you using hardware or software RAID? If so,
> then you can't just
> > turn DMA on on one drive, but on all drives that
> make up the RAID.
> >
> > We also need to know a bit more about your
> hardware. What motherboard
> > are you using? What kind of drives?
> >
> > > 2. How to make sure that the controller/drive
> does not
> > > permit dma
> > > ?
> >
> > Again, it could be an interaction between RAID (if
> used), LVM and your
> > controller.
>
> Hi, I'm a long time reader, first time poster ;)
> I think that I had this problem about a week ago
> when I was rebuilding
> my kernel on a new Debian box. It turned out that
> the problem was that
> if you compiled the kernel with ide_generic enabled,
> this module
> 'knocked' off any specific ide controller (this was
> with kernel 2.6.12 -
> I think).
>
> The way that I ended up fixing this was to do lspci
> and work out what
> chipset was controlling the ide channel (from memory
> it was a VIA) and
> then enabling this in the kernel and disabling the
> ide_generic module.
>
> This worked for me, I am not guaranteeing anything
> for you - but if you
> break it you get to keep both the pieces :)
>
> Andrew Bowden
>
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