"HDIO_SET_DMA failed: Operation not permitted" on Kernel 2.4.28 using "hdparm -d1 /dev/hdc"

Mark Watts m.watts at eris.qinetiq.com
Thu Jan 13 09:02:01 CST 2005


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> Hello,
>
> we got a PE750 with S-ATA(no Raid version). I installed Debian Kernel
> 2.4.28-bf2.4 on it without any problem. With "hdparm -d1 /dev/hdc" I
> activated DMA-Support as well successfully. Then I upgraded to kernel
> 2.4.28. Everything worked fine, but when I tried to activate DMA-Support on
> the harddrives I got the errormessage : "HDIO_SET_DMA failed: Operation not
> permitted".

If this was an ATA only system, I'd say to make sure that you have the correct 
IDE driver for your IDE chipset and not the 'generic' IDE driver.

Mark.


>
> I also tried the image from
> "http://oregonstate.edu/~kveton/debian/debian-dell-2.4.28.iso". Again the
> same error.
>
> Any ideas ?
>
> Wolfgang Schaefer
>
>
>
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- -- 
Mark Watts
Senior Systems Engineer
QinetiQ Trusted Information Management
Trusted Solutions and Services group
GPG Public Key ID: 455420ED

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