CDRW: cdrecord: No disk / Wrong disk!

[Lennart Sorensen]

On Tue, Jul 18, 2006 at 08:04:53PM -0400, Jason Spiro wrote:
> cdrecord disables DMA by default? Why?

No it doesn't.  It may claim DMA is not enabled, but it is usually
wrong.  Also with most kernels, any writes that don't use block sizes of
a multiple of 512bytes will not be allowed to use DMA, which means
burning audio or video CDs will happen without DMA on most kernels.
data CDs and DVDs always use 2048byte blocks and hence get to use DMA,
no matter what Jorg may claim in cdrecord. :)

cdrecord does disable buffer underrun protection by default because Jorg
says it makes less compatible CDs and that all good operating systems
don't need it, whatever that means.

To enable it, if your computer is a bit slow for the speed you are
writing at, add the cdrecord option 'driveropts=burnproof' (I think that
is the correct syntax).  Or you can just reduce the write speed to work
around problems or get a faster computer.

--
Len Sorensen
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