HDIO_SET_DMA failed: Operation not permitted

François Patte Francois.Patte at math-info.univ-paris5.fr
Thu May 12 10:11:45 UTC 2005


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On Jeu 12 mai 2005 15:02, John Summerfied a écrit :

>> I have some problem to read dvd with xine under FC kernel
>> 2.6.11-1.14_FC3.
>> According to xine-check, I have to try: hdparm -d1 -X34 /dev/hdc
>>
>> But the answer is:
>>
>> /dev/hdc:
>>  setting using_dma to 1 (on)
>>  HDIO_SET_DMA failed: Operation not permitted
>>  setting xfermode to 34 (multiword DMA mode2)
>>  using_dma    =  0 (off)
>>
>> What is the reason? And what can I do to solve the problem?
>
> Did you try searching with google, using text from the message, your
> drive's make/model and maybe with "linux?"

Got one message: someone has the same drive as me:

ATAPI CD-ROM, with removable media
Model Number:
SONY DVD+/-RW DW-D56A

he's running suse and the answer is:

Switch to SUSE's kerned of the day (kotd) 2.6.11.4.
Then your CD/DVD will be found as an SATA drive and
will work fine.

He did it and succeeded.

> FWIW I never use -X34, partly because I don't see a use for it, partly
> because the one time I did I had to reboot immediately afterwards.

This is not the case for me, because the command failed, I presume! But I
get the same answer with hdparm -d1 /dev/hdc

Greetings.
- --
François Patte
Ecole française d'Extrême-Orient
Université Paris 5
http://www.math-info.univ-paris5.fr/~patte

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