manip pour passer en udma66 sous win 2000 (j'avais le meme pbm avant) :
Start Registry Editor (Regedt32.exe).
Locate the following key in the registry:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Con
trol\Class\{4D36E96A-E325-11CE-BFC1-08002BE10318
}\0000
On the Edit menu, click Add Value, and then add the following registry value:
Value Name: EnableUDMA66
Data Type: REG_DWORD
Value: 1
Quit Registry Editor.
Restart the computer.