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

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  1. Megahertz's Avatar
    Posts : 2,418
    Windows 7 HP 64 - Windows 10 Pro - Lubuntu
       #11

    jachas666, you didn't edit your profile with ALL your hardware specs as I request.
    System Specs - Fill in at Ten Forums
    If you have a look at the link you will understand why I asked.

    The main problem on your computer is that the boot sequence of your Legacy - MBR are in the two disks.
    Disk D: is active and has the system files
    Drive C: has boot loader and the OS
    Your computer boots from D: and then transfer the boot sequence to C:
    Is your C: drive Legacy or GPT?
    On Disk manager, select View (top menu) - Top

    Why you don't have the Win 10 Recovery partition?

    Please explain how was Win 10 installed. Did it came from Dell or did you installed?
      My Computers


  2. Posts : 6
    Windows 10 Home
       #12

    Disk Management


    I filled in profile with my specs as you asked. My C: drive is is Legacy which is why I was attempting to convert it to GPT. I installed Windows 10 from a bootable USB drive that I installed. To my knowledge, I installed all Windows files ony my C: drive (SSD). I am not sure why I do not have the Recovery Partition. Here is the picture you requested:MBR2GPT Not Working (Disk Layout validation failed for disk 1)-dmanager.jpg
      My Computer

  3. Megahertz's Avatar
    Posts : 2,418
    Windows 7 HP 64 - Windows 10 Pro - Lubuntu
       #13

    To convert the drive 0 to UEFI - GPT you must make it self boot able (not dependable on D:)
    - Backup your data from C: to D:
    - With Disk manager select the C: drive, right click and set it as Active.
    - Shut down, disconnect the D: drive (SATA or Power cable) and boot from drive 0.
    - Once you back to windows you can use MBRtoGPT
    Follow Convert Windows 10 from Legacy BIOS to UEFI without Data Loss

    Remember that once converted to UEFI - GPT you must set BIOS properly

    Next time you're going to do a Clean Install:
    Clean Install Windows 10
    - Detach ALL other drives (SATA or Power cable) leaving on only the target drive.
    - Boot the Win 10 installation USB drive as UEFI, Not Legacy
    - Go to install - Advanced- Delete all partitions and proceed.
    Last edited by Megahertz; 21 Apr 2020 at 15:10.
      My Computers


  4. Posts : 6
    Windows 10 Home
       #14

    I backed up my C: drive and set it as a primary partition but I can't seem to find a way to shutdown my D: drive. Could you help me with that?
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  5. Megahertz's Avatar
    Posts : 2,418
    Windows 7 HP 64 - Windows 10 Pro - Lubuntu
       #15

    Did you set the C: partition as Active?
    You have a laptop. To disconnect the D: drive you must:
    - Take the battery off
    - Open the HDD back door and take the HDD off.

    If you set the C: partition as Active, you will be able to boot from the drive 0 (don't need to take the HDD off)
    Let me know if you're able to boot from drive 0. I will give you more instructions afterwords.
      My Computers


  6. Posts : 6
    Windows 10 Home
       #16

    I followed all the steps and the error "MBR2GPT Not Working (Disk Layout validation failed for disk 1)" disappeared. Unfortunately, a new error appeared. It states: "Cannot find OS partition(s) for disk 1".

    By the way, thank you for continuing to help me with this issue. Hopefully you can help me solve it soon.
      My Computer

  7. NavyLCDR's Avatar
    Posts : 15,515
    Windows 10 Pro
       #17

    Sounds like the computer is booting from disk 1 still. It needs to be booting from disk 0.
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  8. Megahertz's Avatar
    Posts : 2,418
    Windows 7 HP 64 - Windows 10 Pro - Lubuntu
       #18

    NavyLCDR said:
    Sounds like the computer is booting from disk 1 still. It needs to be booting from disk 0.


    To be able to boot from disk 0, disk 0 must be Active and you must change boot priority on BIOS.
      My Computers

  9. NavyLCDR's Avatar
    Posts : 15,515
    Windows 10 Pro
       #19

    Megahertz said:


    To be able to boot from disk 0, disk 0 must be Active and you must change boot priority on BIOS.
    In addition, if the C: drive partition on disk 0 does not contain needed boot files, then:
    bcdboot C:\Windows /s C: /f BIOS
      My Computer


  10. Posts : 6
    Windows 10 Home
       #20

    Thank you guys for helping me, I successfully converted my C: drive to GPT and am booting through UEFI mode.
      My Computer


 
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