Windows7 can open AHCI method

WIN7 without reinstalling. How to open AHCI function without reinstalling the system? I encountered a problem of asking for help, so I thought that I also encountered when I started AHCI after installing Windows7. Such a problem, now share the solution with everyone.






























The result is to return to WIN7, the discovery of the tragedy, can not enter, and only change back to the IDE, so it will be troublesome to toss. Fortunately, I found a way to change ACHI directly without reinstalling the system.
Workaround:
Open the AHCI mode after modifying the registry
1. Click the "Start” button, type “regedit” in the search box, press the Enter key to open “ Table Editor & rdquo; window. Although Windows 7 does not display the "Run" command by default in the "Start" menu, the search box can be used instead of this function (or press the Windows key + R key again).
2. In the "Registry Editor" window title bar, navigate to the HKEY_LOCAL_MACHINE\\SYSTEM\\ CurrentControlSet\\services\\msahci branch, then in the right window, double-click “Start”.
3. In the "Edit DWORD Value" dialog box that opens, change the value in the "Value data" box from 3 to 0, and click the "OK" button.
4. Close the "Registry Editor" window and restart the computer.
5. When restarting the computer, enter the BIOS setup interface and change the hard disk to AHCI mode. For example, for the author's computer, press F1 to enter the BIOS when starting the computer, select Devices→ ATA Drives Setup→ Configure SATA as→ AHCI, and finally press F10 to save and exit the BIOS.
After modifying the registry and enabling the hard disk AHCI mode as described above, you can start it normally without reinstalling the system. Although the startup speed of the computer will not change, when you copy a large number of files, you can see that there is a certain acceleration effect.
Summary:
Of course, everyone has some points to pay attention to when doing specific operations.
The different motherboards enter the BIOS shortcut keys and the location of the AHCI item in the BIOS is different. You can read the manual provided with the motherboard to confirm.
Under normal circumstances, the BIOS is enabled by default in the IDE mode of the hard disk, and AHCI is the abbreviation of Advanced Host Controller Interface, which means the advanced host controller interface. It is a technology led by Intel and can be certain. To improve the speed of SATA hard drives, it is recommended to open.
In Windows Vista SP1 and later systems, the driver is automatically installed after the BIOS changes the hard disk to AHCI mode. But if you are using the operating system before Vista SP1, you need to manually load the AHCI driver through the Windows installation CD when you start the computer. If there is no installation CD for Windows system, please change back to IDE mode, download and install AHCI driver after booting the computer, then enter BIOS to change hard disk to AHCI mode.