if i'm reading this reference document which says the pxa270 should support dma mode 0 1 at least.
right now hdparm -tT /dev/hda lists 1.7 Mb/sec transfer rates. no dma or 32 bit io. everytime i tried to enable 32 bit io my z crashed. everytime i tried to enable dma (hdparm -d 1 /dev/hda) i got - HDIO_SET_DMA failed: Operation not permitted.
i'm going to keep googling about this, but has anyone out there got dma working on their z?