Unable to use MBR2GPT, shrinking the partition fail even manually.

  1.    #1

    Unable to use MBR2GPT, shrinking the partition fail even manually.


    I am trying to convert my system from MBR to GPT in Windows 10 Recovery Mode Command Prompt but sadly I am getting the following error when I try to do so:

    MBR2GPT: Attempting to convert disk 0
    MBR2GPT: Retrieving layout of disk
    MBR2GPT: Validating layout, disk sector size is: 512 bytes
    MBR2GPT: Trying to shrink the system partition
    MBR2GPT: Trying to shrink the OS partition
    Cannot find room for the EFI system partition.
    MBR2GPT: Conversion failed

    There is 37 GB of free space available on C drive and 73 on D drive. I only have two drives.

    Then I started Windows and went into Disk Management and tried to shrink my C drive from there and I got the following error:
    Click image for larger version. 

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    A screenshot of my Disk Management:
    Click image for larger version. 

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    I am running Windows 10 Pro Version 1809, clean installed.
      My ComputerSystem Spec

  2.    #2

    What are you trying to accomplish by converting the drive to GPT?
      My ComputerSystem Spec

  3.    #3

    NavyLCDR said: View Post
    What are you trying to accomplish by converting the drive to GPT?
    UEFI Boot.
      My ComputerSystem Spec

  4.    #4

    lolcocks said: View Post
    UEFI Boot.
    You don't need to convert the drive to GPT to boot in UEFI mode. You just need to recreate your system reserved partition to FAT32 and have boot files in compatible with UEFI booting. It is a very commonly believed, but false, myth that the drive must be GPT to boot in UEFI mode.
      My ComputerSystem Spec


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