On Tue Mar 25, 2003 at 08:16:28AM +0100, Soeren Schmidt wrote: > It seems The Anarcat wrote: > > > hw.ata.atapi_dma="1" # Run the CD-ROM/DVD in DMA mode > > > to /boot/loader.conf. > > > > > > This should be in almost EVERY /boot/loader.conf. The default is 0 (PIO) > > > because DMA is broken on at least a few early CD readers, but it is > > > very rare to have it fail. (I've never seen it.) > > > > Can't the ata drivers detect that condition or recognize the set of > > drives that are broken instead of penalizing everyone else? > > ATAPI DMA is more likely to be broken than to be working, it is a > function of both controller chip and device, in some situations even > a function of what master/slave device combo we have.. > > There is a reason that almost all OS's out there has it disabled as default :)
Thanks for those precisions... This could be a FAQ, pertaining also to
how to enable it.
So it's enabled system-wide? Can't it be done at the bus or device
level?
A.
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