I think that Windows Vista and later and Linux operating system from kernel 2.6.19 have full support of AHCI by default. You don’t need to choose AHCI driver installation separately in this case. However if you are using the older OS like Windows XP, in that case the drivers should be written by the host bus adapter vendor in order to support AHCI. For Windows XP, you will need a vendor-specific driver even if AHCI is available on the host bus adapter. The obvious reason for this is, Windows XP is released earlier. I don’t know about Windows XP SP3 installation.
However in Windows 7 Msahci driver disabled by default. So you have to enable it, if you have already installed the OS using different interface or different mode. It can be done by editing the registry key. First of all open Registry editor and Locate and then click the following registry subkey:
Code:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci
Right pane, right-click Start in the Name column, and click Modify. Type 0 Value data box and click OK. Now reboot the system, Enter into BIOS, make the changes from IDE to AHCI and finally the system restarts after exit from BIOS.
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