Regedit to change from IDE to AHCI on Windows 10

Discussion in 'SSDs & Data Storage' started by JustinSane, Aug 1, 2015.

  1. JustinSane

    JustinSane 2[H]4U

    Jun 29, 2005
    Does anyone know if it's safe to use the regedit to change from IDE to AHCI on Windows 10? I just realized today that I should be using AHCI and I went to change it and got a Inaccessible Boot Device error.

    Also if anyone knows of a guide to do it that's safe and could hook me up with a link that would be awesome. There's a lot of guides that do different things and I'm not sure which to follow.

  2. morningreis

    morningreis [H]ard|Gawd

    Aug 10, 2005
    I had this problem with 8.1 and I tried a TON of fixes on the internet and none of them worked. The quickest most surefire solution is to just reinstall in my opinion. There is no easy way to switch this.
  3. Anemone

    Anemone Gawd

    Apr 5, 2004
  4. iolair

    iolair Limp Gawd

    Oct 27, 2001
    Ok, I tried three methods with WIN10:

    1. Click the Restart Button with Shift key for Safe Boot

    2. MSConfig for safe boot

    3. Registry entries

    BIOS - ICH SATA Control Mode - IDE/ACHI - Set it to ACHI

    No luck.....but I missed one entry in BIOS not shown in the videos.

    My drive is on channel number 6 and I noticed there was also this CTRL mode entry.

    GSATA 6_7 IDE CTRL Mode - IDE/ACHI - Set it to ACHI

    I used the Click the Restart Button with Shift key for Safe Boot method and it worked.

    Don't know now if the other methods would have worked as well.

  5. Aesma

    Aesma [H]ard|Gawd

    Mar 24, 2010
    My method works on all windows (and probably other OS too) as long as you have two SATA controllers.

    1/ make sure the 2nd controller is activated and its drivers installed
    2/ shut down, put your boot drive on that controller
    3/ start up, change the main controller to AHCI or RAID or whatever you need
    4/ boot Windows, install drivers according to the new mode
    5/ shut down, put your boot drive back on the main controller

    You're good to go.

    Been doing this for more than 10 years, when RAID0 was all the rage.

    BTW, are you sure your drive isn't on that second controller ? I would put my main drive on port 0 or 1 to be on the safe side.