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can you please hint me to a solution. I try to change the storage "controller mode" in Windows 10. Currently it is set in my Bios/UEFI to RST mode. I like to change it to AHCI.

  1. Is it right that AHCI mode supports the so called "TRIM" feature of SSD and RST does not support that?

  2. I tried to change it in Bios to AHCI but it prompted a warning saying that all data in the drive will be erased. How can I then boot to my Windows system?

  3. Any solid workaround available to change from RST to AHCI and still be able to boot your existing Windows installation?

  4. I read about restarting the pc in safe mode and after that make the switch to AHCI. I would normally do this method but when I read about the "all data will be erased" I thought to ask before doing it.

  5. What role is the Intel Rapid Storage feature playing in all of this? Would Intel still work with AHCI?

Thanks

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2
  • Does this answer your question? Changing from RAID to AHCI and Windows 7 will not boot. fyi: Intel RST is a RAID. However, I don't actually suggest you change it, since Intel RST supports TRIM. There is a reason your firmware is configured as Intel RST, but you have not specified enough information, to gleam the reason that might be the case. I strongly suggest you do not make this change (but it's still a duplicate).
    – Ramhound
    Commented Feb 28, 2020 at 15:24
  • Possible duplicate of superuser.com/questions/738722/…
    – Ramhound
    Commented Feb 28, 2020 at 17:06

1 Answer 1

Reset to default
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I'd like to answer your second question by saying that your fourth point is valid, since I've just switched a brand new Dell XPS 9310 from RST to AHCI without losing anything (AFAIKT :))
So:

  1. Boot into Windows
  2. Open a shell as administrator
  3. Run bcdedit /set safeboot minimal
  4. Reboot, enter BIOS and switch to AHCI
  5. Reboot into Windows again
  6. Open another shell as administrator
  7. Run bcdedit /deletevalue safeboot
  8. Reboot
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  • 1
    Upvoted, because it worked (before trying, I was curious if people upvoted the answer based on trying it and working or for some other reason, hence the explicit comment for future readers)
    – Martin Modrák
    Commented Aug 7 at 11:36

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