System migration from MBR to UEFI

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  1. Posts : 138
    Windows 7 Ultimate x86
       #1

    System migration from MBR to UEFI


    Greetings.
    One of my machines has been acting up lately, and is no longer able to reliably detect the MBR disk on which a W7x64 ultimate system is installed. Is there a way to migrate the MBR system to a UEFI setup, either in situ or to a new disk?
    Many thanks and best regards,
      My Computer


  2. Posts : 3,772
    win 8 32 bit
       #2

    You say it's not detected is that BIOS or windows? Have you tried another port and cable and run check disk? We need to know the state of the disk if it's got lots of bad blocks then a new disk and a clean install is the only sensible option
      My Computer


  3. Posts : 6,021
    Win 7 HP SP1 64-bit Vista HB SP2 32-bit Linux Mint 18.3
       #3

    Hi goopy,

    samuria said:
    . . . and run check disk? We need to know the state of the disk if it's got lots of bad blocks then a new disk and a clean install is the only sensible option
    As samuria has suggested please do the following . . .

    Under the heading chkdsk [Check Disk] - ALL Parameters . . ., please run CHKDSK.bat, Options [2] and [5] from here => BATCH PROGRAMS [Standalone] and then upload the results using the tutorial at the bottom of the above link [Upload to SevenForums . . .] and someone will look at it for you.

    INFORMATION: I have written quite a few batch scripts in order to streamline processes, avoid possible typing errors, and save time hunting around for specific Windows and tabs etc. It is just quicker and easier for users to run the batch script[s] and then upload the results for us to look at.

    I hope this helps!
      My Computer


  4. Posts : 7,349
    Windows 7 HP 64
       #4

    A boot able UEFI - GPT disk can only be used on a computer with UEFI BIOS.

    If the disk can't be seen by BIOS, it has probably died.
    Do you hear it spinning? Does it make any click noise?
      My Computers


  5. Posts : 138
    Windows 7 Ultimate x86
    Thread Starter
       #5

    Megahertz07 said:
    A boot able UEFI - GPT disk can only be used on a computer with UEFI BIOS.
    ...
    Uhmm...that sounds most sensible, and rather obvious, wont you agree?
    Perhaps something more helpful, like, er....How to migrate OS from MBR to UEFI?
    Many thanks and best regards,
    [btw, I've read many of posts on installation. They've been most useful. Thank you,]
    Last edited by goopy; 14 Oct 2019 at 22:58.
      My Computer


  6. Posts : 565
    Windows 7 Ultimate x32 With Sp1 + Vista Ultimate x32 with Sp1 & Sp2 !!
       #6

    Hi All,
    Greets,

    @goopy :

    1. The Pro versions of good Imaging & Partitioning tools are available for free trial OR AOMEI Backupper Professional 5.3 - Free License . AOMEI Pro is able to make even a Universal Restore.

    2. Also you can use AOMEI Backupper Free/Standard to do the thing as here :
    Restoring MBR System Image to GPT/UEFI

    3. If you ever feel that there is a problem with the disk, first of all clone/Image the disk & then only go for chkdsk, etc. Because in the process, you can lose your data and/or system. The modern age softwares apply methods that give you a good chance to get it all back & working on a new disk.
    Even I have seen times when people Imaged/cloned the faulty disk. Then they applied repairs to the faulty disk & the faulty sectors were mapped & well recognized by the system,etc. Then they restored the clone/image back on the same disk, writing only on the good sectors & sections of the same disk, with full functionality. And certainly they replaced that disk soon

    Let me know.

    Thanks & Regards. ...
    Last edited by Vineet Garg; 22 Nov 2019 at 09:53.
      My Computer


  7. Posts : 7,349
    Windows 7 HP 64
       #7

    To convert a MBR data disk to a GPT disk is quite simple. Many partitions software like Aomei or Mini tool can do it.
    Convert MBR Disk to GPT Disk in Windows 10 | Tutorials

    But to convert a Legacy-MBR boot able disk to a UEFI-GPT isn't that simple.
    A UEFI-GPT has a Fat32 partition that has the boot loader(s) that isn't on the Legacy-MBR disk. This partition has to be created by the OS.
    Win 10 has a function to convert Legacy-MBR boot able disk to a UEFI-GPT and it creates the Fat32 boot loader(s) partition.
    Convert Windows 10 from Legacy BIOS to UEFI without Data Loss | Tutorials
    MBR2GPT | Microsoft Docs

    Win 7 does not have this app.
      My Computers


  8. Posts : 138
    Windows 7 Ultimate x86
    Thread Starter
       #8

    Vineet Garg said:
    Hi All,
    Greets,

    @goopy :

    I never did it myself but there is no risk as you can always choose to clone/Image the disk & then play with the clone/ image & not the real disk & system!

    1. The Pro versions of good Imaging & Partitioning tools are available for free trial. Those can do the thing for you!

    2. Also you can use AOMEI Backupper Free/Standard a reputed free software to do the thing as here :
    Restoring MBR System Image to GPT/UEFI

    3. If you ever feel that there is a problem with the disk, first of all clone/Image the disk & then only go for chkdsk, etc. Because in the process, you can lose your data and/or system. The modern age softwares apply methods that give you a good chance to get it all back & working on a new disk.
    EDIT : Even I have seen times when people Imaged/cloned the faulty disk. Then they applied repairs to the faulty disk & the faulty sectors were well recognized by the system,etc. Then they restored the clone/image back on the same disk, writing only on the good sectors & sections of the same disk with full functionality.
    And certainly they replaced the disks soon

    Hope it helps!

    Thanks & Regards. ...
    Greetings Vineet Garg, thanks for the kind reply.

    1. Can't find on the linked page how to create the FAT32 EFI partition on the target disc. Does AOMEI/Macrium provide such functionality?
    2. Any tools/commands to generate the EFI partition?
    3. Or is it possible to clone an existing EFI partition and use it together with MBR system partition?

    Many thanks and best regards,
      My Computer


  9. Posts : 138
    Windows 7 Ultimate x86
    Thread Starter
       #9

    Megahertz07 said:
    To convert a MBR data disk to a GPT disk is quite simple. Many partitions software like Aomei or Mini tool can do it.
    Convert MBR Disk to GPT Disk in Windows 10 | Tutorials

    But to convert a Legacy-MBR boot able disk to a UEFI-GPT isn't that simple.
    A UEFI-GPT has a Fat32 partition that has the boot loader(s) that isn't on the Legacy-MBR disk. This partition has to be created by the OS.
    Win 10 has a function to convert Legacy-MBR boot able disk to a UEFI-GPT and it creates the Fat32 boot loader(s) partition.
    Convert Windows 10 from Legacy BIOS to UEFI without Data Loss | Tutorials
    MBR2GPT | Microsoft Docs

    Win 7 does not have this app.
    Greetings Megahertz07, thanks for the kind reply.

    1.So it's just a simple matter of running the following elevated command in W10, where disk 1 is the MBR disk to be converted?
    Code:
    mbr2gpt /convert /allowfullOS /disk:1
    2. It says on the linked page that Offline conversion of system disks with earlier versions of Windows installed, such as Windows 7 are not officially supported. What sort of problems can one encounter?

    Many thanks and best regards,
      My Computer


  10. Posts : 7,349
    Windows 7 HP 64
       #10

    I have never used mbr2gpt so I can't say how to use.
    Make a disk image and save to an external disk before you try anything.
    Download and make a WinPE rescue USB disk. Run the mbr2gpt from it.
    Windows 10 Recovery Tools - Bootable Rescue Disk Solved - Windows 10 Forums
    Detach (power or SATA cable) of all other disks
    Make sure you select the proper disk:
    Diskpart
    list disk (take note of your win 7 disk)
    exit
      My Computers


 
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