I solved the problem with my SATA HD by disabling (Bios) the option "PCI IDE Bus Master".
I guess the problem could be a flag (Bios?? or Linux module??), but there is another "interesting effect" that I got by disabling "PCI IDE Bus Master" in my Intel D865PERL Bios:
I also have an IDE HD which was working at UDMA2 (33.3 MB/s) and now is now working at UDMA5 (100 MB/s).
I solved the problem with my SATA HD by disabling (Bios) the option "PCI IDE Bus Master".
I guess the problem could be a flag (Bios?? or Linux module??), but there is another "interesting effect" that I got by disabling "PCI IDE Bus Master" in my Intel D865PERL Bios:
I also have an IDE HD which was working at UDMA2 (33.3 MB/s) and now is now working at UDMA5 (100 MB/s).