problem with UDMA mode on XP1000

[Andrew Gallatin]

Jarkko Santala writes:
 > I suppose no checking explains the performance. ;) But good to know
 > anyway. Any reason why it gets enabled by default if its not safe?

The ata code just enables the highest available mode by default.

I'm no expert, but I don't think PIO is safe either.  I think it just
stresses things so much less than DMA that its assumed to be safe.

Drew