Please read what is in the following link, it's regards to storage input-output mode (UDMA and PIO mode).....I think you issue has something to do with operating system changing the SATA drive mode to slower speed, read on and let us know:
http://www.microsoft.com/whdc/device...e/IDE-DMA.mspx
Cheers
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AMD Athlon 3200+ 2Gig RAM, OS: XP Pro
VMWare 6.xx, Guest OS: DOS622, 98SE, Windows 2K, Windows XP Home, FreeBDS 6.2, MEPIS, CenOS44, Windows 2003 Server SBS, Windows 2003 Server Enterprise, Windows Vista Ultimate
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