DMA Modes in XP

I think this is Windows XP issue and that’s why I post here.

My HD is working in DMA MODE 3 instead of MODE 4 which is its maximum limit. My Motherboard is a QDI Advance 9 (VIA chipset) which natively supports DMA MODE 4. Under windows 98/ME the disk worked fine in DMA MODE 4 but I don't know what happened in Windows XP Pro. (SP1).
I use 80-pin IDE cable.
HD is Maxtor Diamondmax 8,master on first IDE channel. I try to reinstall primary IDE channel and also I install VIA 4in1 drivers but no result.

On microsoft.com says:

"Windows XP downgrades the Ultra DMA transfer mode after receiving more than six CRC errors. Whenever possible, the operating system will step down one UDMA mode at a time (from UDMA mode 4 to UDMA mode 3, and so on).

This is confusing because Win98/Me doesn’t steps down DMA modes

My question is: Is there any possibility to "fix" or revert those CRC errors to normal state or does exist any registry tweak for this problem.

 

You may try checking out the chipset vendor for a newer chipset driver for XP. I have several Dell systems and they ship with Intel based motherboards, and an Intel based chipset driver provided by Dell for XP. But I still hit up support.intel.com for the lastest chipset driver. With some of my systems it make them faster, with others, I don't see a difference.

 

A little bit of MS XP theory on DMA and how it's selected, that supports what Eric suggests.

http://www.microsoft.com/whdc/hwdev/tech/storage/IDE-DMA.mspx