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MBR2GPT

Tuyet Posted messages 466 Status Member -  
bazfile Posted messages 58497 Registration date   Status Moderator Last intervention   -

Hello ,

We are unable to cover MBR to GPT because there is a message indicating "MBR2GPT is not recognized either internally or externally." thank you for helping us yes, we had an excellent afternoon.

regards ,

10 answers

  1.
    fabul Posted messages 42164 Registration date   Status Moderator Last intervention   6 066
     

    Hi,

    Did you boot again in recovery mode?

    Settings
    Update & Security
    Recovery
    Restart

    In recovery mode
    Troubleshooting
    Command Prompt

    mbr2gpt /validate
    mbr2gpt /convert

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  2. Tuyet Posted messages 466 Status Member 11
     

    Hello fabul,

    Thank you for replying fairly quickly. The startup in recovery mode, how do you start it?!

    We start and press F2. Then select MS DOS.

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    1. brucine Posted messages 24901 Registration date   Status Member Last intervention   4 177
       

      Hello,

      The F2 key (or another) is specific to a particular PC brand, and it is not known whether it starts in the recovery environment or on the DOS command prompt which should not be confused.

      MBR2GPT is launched by default from the recovery environment as suggested by Fabul in <1> or by many other methods:
      https://www.malekal.com/demarrer-options-depannage-recuperation-windows-10-11/

      or inside the Windows command prompt by the FullOS switch as specified in Bazfile’s link in <4>

      Other reasons for the indicated message may be that the executable is not located in a default Windows path (unlikely except for very old Windows 10 versions since otherwise it is built-in by default), that it is not executed in the Windows command prompt as administrator, or still in this latter case that third-party security software prevents it.

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  3. flo88 Posted messages 28491 Registration date   Status Contributor Last intervention   Ambassadeur 5 170
     

    Hi

    A few little things to know about MBR2GPT

    First, it will only convert a system disk, not a data disk, so Windows 10 exclusively since the command does not exist in earlier editions and under Windows 11 it does exist but is not needed since disks are GPT by default.

    Next, the command works under Windows, no need to do billions of manipulations, just open PowerShell as admin, then run MBR2GPT with the command, it’s a very simple tool.

    See this tutorial (at the bottom of the article)

    How to Convert a MBR Disk to a GPT Disk Without Data Loss Under Windows 10 - Tech Tribune France

    Signature
    Waiting for other answers; I attract Trolls....

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  6. Tuyet Posted messages 466 Status Member 11
     

    Hello,

    We would like to thank you for your responses

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  7. Tuyet Posted messages 466 Status Member 11
     

    Hello everyone ,

    In the MS-DOS command, you enter the command "mbr2gpt /validate /allowfullos". As soon as you validate, the message "MBR2GPT is not recognized as an internal or external command" appears.

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  8. Tuyet Posted messages 466 Status Member 11
     

    If you type

    mbr2gpt /validate disk:<disk0 /fullos

    mbr2gpt /convert disk:<disk0 /fullos

    The file cannot be found

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    1. brucine Posted messages 24901 Registration date   Status Member Last intervention   4 177
       

      Apart from any other consideration, your syntax is incorrect:

      mbr2gpt /convert /disk:n /allowfullos

      run as administrator where n is the disk number.

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  9. bazfile Posted messages 58497 Registration date   Status Moderator Last intervention   20 273
     

    See https://www.malekal.com/resoudre-les-erreurs-mbr2gpt-pour-convertir-un-disque-en-gpt/

    If nothing works, repair Windows, since you did not specify your Windows version, here are the repair procedures for Windows 10 and 11.

    If you are under Windows 11.

    Do a repair of Windows 11:

    To do this you need to download the Windows 11 disk image (ISO) see this page.

    Then once the ISO is downloaded, repair Windows 11 see this page.

    If you are under Windows 10.

    Do a repair of Windows 10 without data loss (everything is preserved), despite what is shown on the screens, this is indeed a repair, not a Windows installation.

    Download this Microsoft tool open the tool and do as shown below:

    Make sure to leave checked as in the photo.

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  10. Tuyet Posted messages 466 Status Member 11
     

    Hello Bazille,

    Thank you, we have Windows 10 and we are going to upgrade to Windows 11

    Ah! You have to type it like this "C:\Windows\system32>mbr2gpt /validate /disk: 0 /allowFull0S" .

    We typed disk two times . . .

    C:\Windows\system32>mbr2gpt /validate disk:<disk: 0 /allowFull0S

    We don’t know if Diskpart is needed afterwards

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    1. bazfile Posted messages 58497 Registration date   Status Moderator Last intervention   20 273
       

      So fix Windows 10.

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  11. Tuyet Posted messages 466 Status Member 11
     

    Hello everyone,

    brucine is right, the syntax is incorrect: .

    You should type like "mbr2gpt /convert /disk:n /allowfullos

    Anyway, thank you everyone, the problem is solved. It only remains to prepare Windows 11

    We wish you an excellent day

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