Windows XP and UDMA Problems

[SirWorksalot]

I am running Windows XP on a Tyan 510 mobo with a Western Digital 40GB ATA/100 drive as primary master. In the BIOS, the drive is recognized as ATA/100 and according to Western Digital's ATA Utility, the drive is setup for ATA/100 (UDMA Mode 5). However, in XP, the system is running the drive in PIO mode for some reason. I have set the Secondary IDE Bus up to run the drive in "DMA if available" and installed the VIA Bus Mastering IDE Drivers, but XP still runs the drive in PIO Mode. Anyone have any ideas?

 

[linney]

Maybe these windows 2000 knowledge base articles can interest you.

Device Manager Lists ATA-100 Device Incorrectly as Using PIO Instead of UDMA (Q269555)

http://support.microsoft.com/support/kb/articles/q269/5/55.asp

Support for ATA 100 (Mode 5 ) in Windows 2000 (Q260233)

http://support.microsoft.com/support/kb/articles/q260/2/33.asp

 

[OnlineGuitarist]

I believe he said he is having a problem with UDMA in windows xp, not windows 2000. Everyone knows win2k does not support UDMA Mode 5 without the proper updates, but Windows XP supports UDMA Mode 5 without any updates. Those articles are useless. Besides that, I am having the exact same problem, but only after I installed Service Pack 1 of Windows XP Professional. Sucks without UDMA. But i'll find a solution and post it later, if you have already found one, please reply to this. Oh and in case you are wandering, Udma in bios is enabled.

 

[linney]

A bit of information here.

http://groups.google.com/groups?hl=...ng+the+drive+in+PIO+mode%2Bwindows%2Bxp%2Bsp1

http://groups.google.com/groups?hl=...ng+the+drive+in+PIO+mode%2Bwindows%2Bxp%2Bsp1

Microsoft Knowledge Base Article - Q310751
Device Settings Are Hard to Find in Windows XP

http://support.microsoft.com/default.aspx?scid=KB;EN-US;q310751&