With reference to the wiki at ubuntu.com,
Edit /etc/modules:
For an intel cpu put the lines
piix
ide-core
above the line ide-cd
For an amd cpu put the line
amd74xx
above ide-cd
For a VIA Chipset put
via82cxxx
above ide-cd
my hdparm parameters
hdparm -c1 -d1 -X70 /dev/hda
-c1 enables 32bit IO
-d1 enables DMA
-X70 sets DMA to UDMA6
that’s all folks.