hw.ata.atapi_dma in 5.4-RELEASE-p1

[Janet Sullivan]

>>When I put hw.ata.atapi_dma="1" in /boot/loader.conf and reboot, I'm
>>still stuck in PIO4.  What am I doing wrong?

> The drives probably don't support any UDMA modes. WDMA modes aren't enabled 
> for atapi devices because there's a very large number of devices which don't 
> implement them right or not at all, yet claim to support them.

That was it.  The drives only support WDMA modes.  Thanks!