How to set SATA hard disk AHCI mode after Win10 system installation?

SATA hard disk can work in traditional IDE and AHCI mode. The latter has many advantages over the former. The most obvious is to shorten the hard disk seek time and speed up. File read speed. However, only when you turn on AHCI mode in the BIOS, the system will install the required driver and enable it when you install the system. If you do not switch to AHCI before installation, directly enabling AHCI in the BIOS after installation will cause the system to fail to start properly.

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Of course, this does not mean that the user must reinstall the system. To open AHCI at this time, please refer to the following steps. This method does not need to modify the registry:

&bull First, follow the second method of how to set up win8/win8.1 to enter safe mode with 9600 version. Add Win10 security mode to the system startup menu;

• Restart, view The menu has been added normally and attempts to enter safe mode to make sure it can enter normally.

• Restart the computer and press the keyboard shortcut to enter the BIOS setup. Different brands of computers enter the BIOS settings differently, generally F1F2, F10, Del and other buttons.

• Find the hard disk controller mode setting option in the BIOS (look for the setting options including SATA, IDE, AHCI) and change the hard disk mode from IDE to AHCI.

For example, when a computer starts, press F1 to enter the BIOS, then select Devices→ ATA Drives Setup→ Configure SATA as→ AHCI, as shown below, and finally press F10 to save and exit the BIOS.

• Save changes and restart your computer. Be sure to enter safe mode first!

• After successfully entering the safe mode, restart the computer and select normal startup. Under normal circumstances, it can be started normally. At this point, the hard disk mode is switched from IDE to AHCI.

If you cannot start normally after following the above steps, you can switch back to the IDE. Then try to modify the registry's method conversion mode.

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1. Click the "Start" button, type "ldedit" in the search box (Figure 1) Press the Enter key to open the “Registry Editor” 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 (above Figure 2), click &ldquo ; OK & rdquo; button.

4. Close the "Registry Editor" window and restart your computer.

5. When restarting the computer, enter the BIOS setup interface and change the hard drive to AHCI mode. For example, for the author's computer, press the F1 key to enter the BIOS when starting the computer, select Devices→ ATA Drives Setup→ Configure SATA as & rarr; AHCI (Figure 3), and finally press F10 to save and exit the BIOS.

After you modify the registry as described above and open the hard disk AHCI mode without having to reinstall the system can properly started. 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. Different motherboards enter the BIOS shortcut keys and the location of the AHCI item in the BIOS is different. You can read the manual attached to 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, which is a technology led by Intel. It can improve the speed of SATA hard disk to a certain extent, it is recommended to open it.

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.