atacontrol mode D PIO4 persist across reboots

Philip M. Gollucci pgollucci at
Mon Mar 10 08:33:34 UTC 2008

Manolis Kiagias wrote:
> Have a look at man 4 ata
> Your answer is probably:
>  hw.ata.ata_dma=0
This sets it for all controllers I only want to set it for ata1 which 
contains ad2.  Thanks for the tip though.

ata0: <ATA channel 0> on atapci0
ata0: [ITHREAD]
ata1: <ATA channel 1> on atapci0
ata1: [ITHREAD]
ad0: 19092MB <WDC WD200BB-60CJA0 16.06V16> at ata0-master UDMA33
ad1: 38166MB <WDC WD400BB-53CLB0 95.04E95> at ata0-slave UDMA33
ad2: 28667MB <SAMSUNG SV3002H PV100-11> at ata1-master UDMA33

Philip M. Gollucci (pgollucci at
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