Is there still sufficient reason for hw.ata.atapi_dma being 0 by default?

Josh Elsasser jre at vineyard.net
Sat Jul 31 00:58:12 PDT 2004


On Fri, Jul 30, 2004 at 02:59:47PM +0300, Maxim Sobolev wrote:
> Since high-speed CD-RW/DVD-RW recorders (32x - 52x) are commodity now 
> IMO it makes sense to review hw.ata.atapi_dma default of 0, since 
> apparently PIO mode can't support necessary sustained data transfer 
> rates anymore. For example I had had problems burning RWs on 16-24x with 
> several drives in PIO mode, which gone when I've switched to DMA.

Funny, I have a cheap drive that I had problems with when using DMA,
which (mostly) went away when I switched to PIO.  Perhaps the burncd
manpage should mention that you might have to fiddle with
hw.ata.atapi_dma to burn successfully.

 -jre


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