Re: HDIO_SET_DMA failed: Operation not permitted

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François Patte wrote:
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Bonjour,
ullo ullo

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?"


Try that; then offer more info to the list. It's likely to be something that occurs with your model and few others; earlier today I turned DMA on for one of my drives.

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.



--

Cheers
John

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