I reset BIOS SATA setting to ACHI and now can't return to RAID


  1. Posts : 248
    Windows 10 Pro
       #1

    I reset BIOS SATA setting to ACHI and now can't return to RAID


    I somehow reset my BIOS when inserting a new graphics card. My system drive is an SDD whilst I also have two HDDs connected to the motherboard which are supposed to be in RAID 0. I reconfigured my BIOS the best I could from memory and when I loaded Windows, my RAID was missing. I found a setting in the BIOS called the SATA configuration which is selectable between AHCI (default) and RAID. I presume that it was set to RAID previously in order for the HDDs to be in RAID 0 configuration so I set the SATA configuration to RAID. After doing this, Windows would no longer boot. I recall Windows having a hangup about this setting and it occurs to me that maybe Windows is okay if the setting changes from RAID to AHCI but changes itself when it detects this change and then refuses to go in the opposite direction after the setting is changed back. Does anyone know if this might be the case?
      My Computer


  2. Posts : 56,112
    Multi-boot Windows 10/11 - RTM, RP, Beta, and Insider
       #2

    THX1138 said:
    I somehow reset my BIOS when inserting a new graphics card. My system drive is an SDD whilst I also have two HDDs connected to the motherboard which are supposed to be in RAID 0. I reconfigured my BIOS the best I could from memory and when I loaded Windows, my RAID was missing. I found a setting in the BIOS called the SATA configuration which is selectable between AHCI (default) and RAID. I presume that it was set to RAID previously in order for the HDDs to be in RAID 0 configuration so I set the SATA configuration to RAID. After doing this, Windows would no longer boot. I recall Windows having a hangup about this setting and it occurs to me that maybe Windows is okay if the setting changes from RAID to AHCI but changes itself when it detects this change and then refuses to go in the opposite direction after the setting is changed back. Does anyone know if this might be the case?
    Not familiar with your MB, but you should have an option in BIOS to reset to factory defaults. On the odd chance you do not, popping the CMOS battery and reinserting will also reset. Copy down all the current settings first, so at least you have a return point. Only thing I can think of now.
      My Computers


  3. Posts : 248
    Windows 10 Pro
    Thread Starter
       #3

    f14tomcat said:
    Not familiar with your MB, but you should have an option in BIOS to reset to factory defaults. On the odd chance you do not, popping the CMOS battery and reinserting will also reset. Copy down all the current settings first, so at least you have a return point. Only thing I can think of now.
    Thanks but unfortunately, resetting the BIOS is how I got into this situation so I don't see how it could help. Resetting the BIOS will change the SATA setting to AHCI but I've already done that so I can type this message. It won't get me any closer to recovering my RAID 0!
      My Computer


  4. Posts : 809
    Win10
       #4

    I haven't found any definitive statement saying that Windows can't handle RAID->AHCI->RAID. I tried this on my system and get the INACCESSIBLE_BOOT_DEVICE error when going from RAID->AHCI and from AHCI->RAID.

    However, in both cases booting to safe mode and then rebooting back into normal mode fixes the issue.
      My Computer


  5. Posts : 2,302
    Win10 202H
       #5

    Windows 10 is pretty forgiving if you go through Safe Mode as 'Nettles said

    If you already installed under RAID, you can change to AHCI with Win 10. ( and visa versa)


    1. In Win 10, do a safemode boot by going to run (Win Key+R) => type msconfig.exe and choose => boot => safe boot.
    2. On the reboot, hit F2 or Delete and go into Bios ( before Safe Mode ) and change to AHCI/RAID as needed.
    3. Then boot into Safemode and let Win10 load the default MS drivers automatically.
    4. Open msconfig as as above change back to normal boot, then reboot.
    5. Win10 will once again load the AHCI/RAID Drivers as needed automatically ( may need a reboot
    6. Then install the Intel RST Driver or Samsung NVMe driver if needed.
      My Computers


  6. Posts : 248
    Windows 10 Pro
    Thread Starter
       #6

    Thanks, guys; restarting in safemode and switching the setting during the reboot (and then rebooting back into normal mode) fixed it! My life has improved 7%! <3
      My Computer


  7. Posts : 2,302
    Win10 202H
       #7

    only 7% ? :) rough week ?

    thanks for reporting back ....

    KB.
      My Computers


  8. Posts : 1
    Win10
       #8

    Kbird said:
    Windows 10 is pretty forgiving if you go through Safe Mode as 'Nettles said

    If you already installed under RAID, you can change to AHCI with Win 10. ( and visa versa)


    1. In Win 10, do a safemode boot by going to run (Win Key+R) => type msconfig.exe and choose => boot => safe boot.
    2. On the reboot, hit F2 or Delete and go into Bios ( before Safe Mode ) and change to AHCI/RAID as needed.
    3. Then boot into Safemode and let Win10 load the default MS drivers automatically.
    4. Open msconfig as as above change back to normal boot, then reboot.
    5. Win10 will once again load the AHCI/RAID Drivers as needed automatically ( may need a reboot
    6. Then install the Intel RST Driver or Samsung NVMe driver if needed.
    OMG!!!!!!! I spent 4 days trying to fix my problem. I spent hours searching the internet and forums and reading different suggestions and tying them all. I must have restarted my computer 1000 times and nothing worked UNTIL I stumbled this suggestion.

    It worked, and after I did as suggested above. My computer works flawlessly and I can see all my other Hard drives.
    Big big thank you. If you live in GTA. Iíll buy you coffee :):):)
      My Computer


  9. Posts : 2,302
    Win10 202H
       #9

    JustThankYou said:
    OMG!!!!!!! I spent 4 days trying to fix my problem. I spent hours searching the internet and forums and reading different suggestions and tying them all. I must have restarted my computer 1000 times and nothing worked UNTIL I stumbled this suggestion.

    It worked, and after I did as suggested above. My computer works flawlessly and I can see all my other Hard drives.
    Big big thank you. If you live in GTA. I’ll buy you coffee :):):)

    Happy to help ......lucky for you I am on the west coast :)

    KB
      My Computers


 

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