Re: cdrecord DMA speed too slow error on 6.0 BETA2

[Dave Huang <khym%azeotrope.org@localhost>]

On Sat, Jun 02, 2012 at 11:12:10PM +0530, Mayuresh wrote:
> Here is from the machine where I face problem:
> 
> $ dmesg | grep -e cd0 -e atapibus0
> atapibus0 at atabus0: 2 targets
> cd0 at atapibus0 drive 1: <HL-DT-ST DVDRAM GSA-H10N, K25E57N4416, JL10>
> cdrom removable
> cd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 2 (Ultra/33)
> 
> (It doesn't seem IDE.)

That drive seems to be an IDE drive... interesting that there's no
line like the

cd0(piixide0:0:0): using PIO mode 4, Ultra-DMA mode 2 (Ultra/33) (using
DMA)

from your other machine. If it's not using DMA, that would probably
explain your burning problem. Information about your IDE controller
must be somewhere in the dmesg... atapibus0 is attached to atabus0, so
grep for atabus0 and see where that's attached. That should be your
IDE controller, so grep for that.

E.g., on one of my machines, I have:
atapibus0 at atabus2: 2 targets

and then:
atabus2 at cmdide0 channel 0

and finally:
cmdide0 at pci0 dev 11 function 0: CMD Technology PCI0646 (rev. 0x01)
cmdide0: bus-master DMA support present
cmdide0: primary channel wired to compatibility mode
cmdide0: primary channel interrupting at isa irq 14
atabus2 at cmdide0 channel 0
cmdide0: secondary channel wired to compatibility mode
cmdide0: secondary channel interrupting at isa irq 15
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