HDIO_SET_DMA failed: Operation not permitted

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HDIO_SET_DMA failed: Operation not permitted

HDIO_SET_DMA failed: Operation not permitted

2006-01-27 - By Biswajit Nayak

Back

Reply: 1 2 3 4 5 6 7 8

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

2. How to make sure that the controller/drive does not
permit dma
?

Thanks
Biswajit

--- Rick Stevens <rstevens@(protected)> wrote:

> On Fri, 2006-01-27 at 16:42 -0800, Biswajit Nayak
> wrote:
> > Hi Experts,
> > I want to enable the DMA on my linux server. I
> got
> > the following error "HDIO_SET_DMA failed:
> Operation
> > not permitted ". Any take on this ?
> >
> > [root@(protected) ocsperf]# /sbin/hdparm -d1
> /dev/hda
> >
> > /dev/hda:
> > setting using_dma to 1 (on)
> > HDIO_SET_DMA failed: Operation not permitted
> > using_dma = 0 (off)
> > [root@(protected) ocsperf]#
>
> Did you boot the system with "nodma" set? Check the
> output of
> "cat /proc/cmdline" to see. If you did, you'll have
> to reboot the
> system WITHOUT that option.
>
> It's also possible that your controller (or drive)
> doesn't permit DMA.
>
>
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
> - Rick Stevens, Senior Systems Engineer
> rstevens@(protected) -
> - VitalStream, Inc.
> http://www.vitalstream.com -
> -
> -
> - "Do you suffer from long-term memory loss?" "I
> don't remember" -
> - -- Chumbawumba,
> "Amnesia" (TubThumping) -
>
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>
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