Attn. SSD owners - Enabling AHCI mode AFTER Windows 10 installation.

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  1. Posts : 558
    Windows 10
       #21

    essenbe said:
    If you look in Device Manager under IDE ATA/ATAPI Controllers and at the bottom see the AHCI drivers, you are in AHCI mode. Just make sure you are connected to a port controlled by the Chipset (0-3 is usually recommended). Here is mine.

    Attachment 37238

    Here is a Tutorial on how to do it. It works in Windows 7 and Windows 8/8.1, I haven't tried it in Windows 10 yet, but it should work.

    AHCI : Enable in Windows 7 / Vista - Windows 7 Help Forums

    I don't see that option while following the tutorial
    Attached Thumbnails Attached Thumbnails Attn. SSD owners - Enabling AHCI mode AFTER Windows 10 installation.-screenshot-11-.png  
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  2. Posts : 12,725
    Windows 11 Pro
       #22

    That is not a part of the tutorial.
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  3. Posts : 558
    Windows 10
       #23

    I think it is , the tutorial shows finding the "msahci" in regedit and my system doesn't show that file.
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  4. Posts : 12,725
    Windows 11 Pro
       #24

    Look for the storahci.sys driver.
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  5. Posts : 558
    Windows 10
       #25

    essenbe said:
    Look for the storahci.sys driver.


    Unfortunately i don't seem to have that one on my system , don't know why . My system shows AHCI mode in BIOS though .
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  6. Posts : 19,208
    W11+W11 Developer Insider + Linux
       #26

    fredc said:
    Unfortunately i don't seem to have that one on my system , don't know why . My system shows AHCI mode in BIOS though .
    To show up in registry, AHCI driver has to be installed first. Probably iastor.sys
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  7. Posts : 12,725
    Windows 11 Pro
       #27

    Mike, in IDE mode, the AHCI drivers are not installed. The registry edit 'forces' Windows to load them. A start value of 3 is not loaded. Changing it to 0, makes it load them if you reboot and change the BIOS to AHCI. That's really the whole purpose of the tutorial. I have always wondered why you couldn't install Intel Rapid Storage which contains iaStorV which is the Intel AHCI driver, then change the BIOS value.Maybe you could, I have just never tried it.
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  8. Posts : 19,208
    W11+W11 Developer Insider + Linux
       #28

    essenbe said:
    Mike, in IDE mode, the AHCI drivers are not installed. The registry edit 'forces' Windows to load them. A start value of 3 is not loaded. Changing it to 0, makes it load them if you reboot and change the BIOS to AHCI. That's really the whole purpose of the tutorial. I have always wondered why you couldn't install Intel Rapid Storage which contains iaStorV which is the Intel AHCI driver, then change the BIOS value.Maybe you could, I have just never tried it.
    Not sure about Intel but have done it an AMD systems.
      My Computers


  9. Posts : 1
    Windows 10
       #29

    I just registered to say that after entering the first command and restarting the computer, it won't turn on anymore. After it posts, I get no display and basically, nothing works. I've tried switching the sides of the battery, replacing the RAM and a bunch of other stuff.
    Do NOT follow this if you don't want to risk screwing your PC up.
    If anyone had the same problem as me and found a solution, please contact me.
      My Computer


  10. Posts : 299
    Windows 10
       #30

    essenbe said:
    Mike, in IDE mode, the AHCI drivers are not installed. The registry edit 'forces' Windows to load them. A start value of 3 is not loaded. Changing it to 0, makes it load them if you reboot and change the BIOS to AHCI. That's really the whole purpose of the tutorial. I have always wondered why you couldn't install Intel Rapid Storage which contains iaStorV which is the Intel AHCI driver, then change the BIOS value.Maybe you could, I have just never tried it.


    It works exactly as you have assumed. I have done it in Windows 7 and recently in Windows 10 when I played with a raid set up and then switched back to a single SSD. Obviously I had to change my bios setting before rebooting into the single SSD mode.
      My Computer


 

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