[Bug 174322] Re: S-ATA cannot be set to use DMA and 32-bit mode

[Jonathan Rogers]

I could be mistaken, but I've been firmly under the impression that
setting most performance-related modes like 32-bit transfers and DMA is
not necessary for SATA devices, since the host interface should take
care of tuning to a much greater extent than was possible for legacy
parallel ATA. I have a Western Digital Raptor connected to the SATA
inteface on my Asus motherboard using the sata_via driver and "sudo
hdparm -c 1 -d 1 /dev/sda" also fails for me, though performance is
great: dparm measures almost 70MB/sec reading.

Of course, if you aren't able to use hdparm to set those values for a
parallel ATA device (which may also be called /dev/sd? if it's provided
by a libata driver), that's a completely different issue.

-- 
S-ATA cannot be set to use DMA and 32-bit mode
https://bugs.launchpad.net/bugs/174322
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