Re: [Resolved] Re: Cdrecord loses permission to write CD's...

[Emanoil Kotsev <deloptes@yahoo.com>]

Kenward Vaughan wrote:

> On Mon, 2008-10-27 at 18:31 +0100, Emanoil Kotsev wrote:
>> Kenward Vaughan wrote:
>> 
>> > On Sun, 2008-10-26 at 23:58 +0100, Jochen Schulz wrote:
>> >> Kenward Vaughan:
>> >> > On Sun, 2008-10-26 at 23:29 +0100, Jochen Schulz wrote:
> ...
>> >> Do you have DMA enabled at all? Check with 'hdparm -d /dev/$foo',
>> >> replacing $foo with your cd/dvd device and your hard disk(s).
>> >> 
>> >> J.
>> > 
>> > I've tried that at times with no luck on the CDs:
>> > 
>> > hpotter:/home/daddy# hdparm -d on /dev/hda
>> > on: No such file or directory
>> > hpotter:/home/daddy# hdparm -d 1 /dev/hda
>> > 
>> > /dev/hda:
>> >  setting using_dma to 1 (on)
>> >  HDIO_SET_DMA failed: Operation not permitted
>> >  using_dma     =  0 (off)
>> > 
>> > My HDs are SATAs, so hdparm doesn't work, written as above, at least.
>> > 
>> > Do you know whether there is a setting or series of settings in my
>> > kernel that I don't realize need to be changed??  (I roll my own.)
>> > 
>> > Thanks,
>> > 
>> > 
>> > Kenward
>> 
>> Hi, I had the same issue with activeting the GENERIC_IDE option in the
>> kernel. Look at ATA/ATAPI/MFM/RLL under Device Drivers
>>         generic/default IDE chipset support -> CONFIG_IDE_GENERIC
>>         Generic PCI IDE Chipset Support -> CONFIG_BLK_DEV_GENERIC
>> 
>> Disable them or set them to <M> this way no generic ide is setup and the
>> ata_* code takes effect which leads to u/DMA getting enabled
>> 
>> After this your drive (and/or cd/dvd) will be found as /dev/sdX
>> respectively /dev/srX
>> 
>> hope this helps for me it worked
>> 
>> regards
> 
> Emanoil,
> 
> Wonderful!  I finally got time to try this, and it worked great. The CDs
> are flying out of the tray now.
> 
> Thanks to Jochen too, for your help as well with this!
> 
> 
> Kenward

welcome,
Glad to hear that. It took me about half an year among all my other duties
to get used to the new kernel (2.6.2X) and read most of the documentation
and finally find out what is going on with my dvd recorder.

regards