Having trouble with proper detection of UDMA/33 hdd

[IronCityPA]

Hi all. Not too long ago I upgraded my system with the following components: Athlon 950mhz cpu, Shuttle ak31 rev3.1 mobo, 256mb ddr-sdram, and a 40gig maxtor 7200rpm hdd. When I upgraded I did a fresh install of win98SE and then upgraded to winxp pro. I tried installing the via 4-in-1 drivers and they have errors such as not being able to detect the scsi devices (i have 2 scsi-3 cd-rom and rW drives and an adaptec 2902I pci card) and also it detects my 7200rpm drive but not the udma/33 drive which is set to master on channel 2. Supposedly I don't even need the via drivers with winxp? Anyhow.. my 7200rpm drive works perfectly but for some reason my udma33 drive is being detected in windows as PIO mode 4 drive. The bios is correctly detecting it as a udma33 device.... any ideas why windows has it set to pio mode 4? It was bugging me too much until today when I extracted 50 10mb rar files from my udma33 drive to another folder on the same drive.... and it took MUCH longer than if on the 7200rpm drive and also cpu utilization was at 100% (pio uses more cpu utilization correct?)

I'd appreciate any help!

Thanks.

 

[JustinLerner]

You don't need to install Win 9x to install the XP upgrade for 9x. There may be some inherent problems with upgrading as opposed to just installing XP from the CD on a blank/unformatted HD. (Just insert the 98 CD when asked).

I've seen many people complaining about similar problems with DMA/PIO mode selection in XP. I don't know what the cause is, but I suspect that 98 did something in it's detect, installation, setup and XP did something to compensate for compatibility in the upgrade.