It seems Vadim Belman wrote: > > > Bruce Cran wrote: > > > Your CD drive should indeed support UDMA33 - my DVD drive supports > > UDMA33, and my CDRW supports multi-word DMA, even though my BIOS only > > ever configures it for PIO4, and my DVD for UDMA33. FreeBSD only ever > > configures them for PIO during bootup, but, using the atacontrol > > program, it configures them both for maximum speed, even knowing they > > _can_ only do UDMA33,WDMA2. > > If you have a look at sysctl hw.ata tree, it'll give you the clue on > how to overcome this behaviuor. In simple words, what you need is to poot > > hw.ata.atapi_dma=1 > > in your /boot/loader.conf and have the nirvana of automatic DMA > detection...
And remember the warning that it does not always work as expected, ATAPI DMA is a many headed monster... -Søren To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-current" in the body of the message