[ltp] T43, DMA on DVD drive

[fire-eyes]

Wolfgang Karall wrote:
> On Fri, 2006-01-27 at 12:43 -0500, fire-eyes wrote:
> 
>>I have tried /dev dvd cdrom cdrw scd* sr* sg* sd* hd* . I run kernel
>>2.6.15.1.
> 
> 
> It should be /dev/sr0. Do you see something along the lines of
> 
> sr0: scsi3-mmc drive: 24x/24x writer dvd-ram cd/rw xa/form2 cdda tray
> Uniform CD-ROM driver Revision: 3.20
> sr 1:0:0:0: Attached scsi CD-ROM sr0
> 
> in your dmesg output? Do you have CONFIG_BLK_DEV_SR set in your kernel
> configuration?
> 
> Regards
> WK

No, I did not have that option set in the kernel. Setting it caused it
to show up as you said.

However upon trying to turn the DMA on I get a different error:

# hdparm -d 1 /dev/sr0

/dev/sr0:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Inappropriate ioctl for device


Any further ideas? Thank you for helping me progress!