MBR2GPT Not Working (Disk Layout validation failed for disk 1)

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  1. Posts : 9
    Windows 10 Pro
       #1

    MBR2GPT Not Working (Disk Layout validation failed for disk 1)


    I've been trying to convert my boot drive from legacy to UEFI but I keep getting the same error all the time (Disk Layout validation failed for disk 1)

    My partitions:
    Attached Thumbnails Attached Thumbnails MBR2GPT Not Working (Disk Layout validation failed for disk 1)-5n5wl6e.png  
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  2. Macboatmaster's Avatar
    Posts : 1,367
    11, 10, 8.1 and 7 all Professional versions, and Linux Mint
       #2

    See this
    Convert Windows 10 from Legacy BIOS to UEFI without Data Loss
    MOST LIKELY the cause the is that there is no free space to create the FAT EFI partition
    see post 46 on that link
    It will not work without some unallocated space on Disk1
      My Computer

  3. Megahertz's Avatar
    Posts : 3,296
    Windows 7 HP 64 - Windows 10 Pro - Lubuntu
       #3

    Drive 0 has a System reserved partition set as Active and drive 1 has no Active partition

    It seems that you're booting from drive 0 partition 1 and transferring the boot sequence to drive 1 partition 1.
    To confirm, shutdown and detach drive 0 (SATA or power cable) and try to boot.
    If you confirm it can't boot, I'll give you instructions on how to fix it.
      My Computers


  4. Posts : 9
    Windows 10 Pro
    Thread Starter
       #4

    Megahertz said:
    Drive 0 has a System reserved partition set as Active and drive 1 has no Active partition

    It seems that you're booting from drive 0 partition 1 and transferring the boot sequence to drive 1 partition 1.
    To confirm, shutdown and detach drive 0 (SATA or power cable) and try to boot.
    If you confirm it can't boot, I'll give you instructions on how to fix it.
    I disconnected the power from my HDD and tried to boot and it cannot boot.
      My Computer


  5. Posts : 39,151
    windows 10 professional version 1607 build 14393.969 64 bit
       #5
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  6. Megahertz's Avatar
    Posts : 3,296
    Windows 7 HP 64 - Windows 10 Pro - Lubuntu
       #6

    Lets rebuild your boot loader on drive 1
    Open a CMD window as administrator and type:
    diskpart
    select volume c
    active
    exit
    bcdboot C:\Windows /s C: /f BIOS
    exit

    Shutdown, detach drive 0 (unplug SATA or power supply cable), make sure drive 1 is first on the Boot priority and try to boot.

    If it boots normally, pen a CMD window as administrator and type:
    MBR2GPT /validate (to find out if you able to convert to GPT. Don't convert - Wait for instructions)

      My Computers



  7. Posts : 9
    Windows 10 Pro
    Thread Starter
       #7

    Megahertz said:
    Lets rebuild your boot loader on drive 1
    Open a CMD window as administrator and type:
    diskpart
    select volume c
    active
    exit
    bcdboot C:\Windows /s C: /f BIOS
    exit

    Shutdown, detach drive 0 (unplug SATA or power supply cable), make sure drive 1 is first on the Boot priority and try to boot.

    If it boots normally, pen a CMD window as administrator and type:
    MBR2GPT /validate (to find out if you able to convert to GPT. Don't convert - Wait for instructions)

    When entering the command bcdboot C:\Windows /s C: /f BIOS i get this error:

    BFSVC Error: Could not open the BCD template store. Status = [c000000f]
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  8. SIW2's Avatar
    Posts : 2,360
    trying to install win10
       #8

    Did you use adminstrator cmd ?
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  9. Posts : 9
    Windows 10 Pro
    Thread Starter
       #9

    SIW2 said:
    Did you use adminstrator cmd ?
    Just tried again and it worked, i was sure i started it with adminstator
    will see if it boots now

    Edit:
    The computer boots but when entering the command MBR2GPT /validate i get this error:
    Cannot find room for the EFI system partition.
      My Computer

  10. Megahertz's Avatar
    Posts : 3,296
    Windows 7 HP 64 - Windows 10 Pro - Lubuntu
       #10

    Leave the drive 0 detached.

    With Disk Manager (C:\Windows\System32\diskmgmt.msc), shrink the C: partition by 120MB. Leave the space as unallocated and run MBR2GPT /validate. Don't convert - Wait for instructions
      My Computers


 
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