Can't boot from newly cloned SSD drive

  1. Posts : 1
    Windows 10

    Can't boot from newly cloned SSD drive

    Hi, most common topic probably, sorry !

    I'll try to spare the details, but I've got the point where I have successfully cloned my old 250GB NVME SSD OS drive to a new 1TB NVME SSD drive and got it to boot in my old PC, but cannot get it to boot or even be spotted in BIOS of new motherboard.

    Old system MBR.
    So I formatted new SSD as MBR and migrated old to new using Macrium Reflect in WinPE mode.
    Checked and booted ok in old system.
    Put in new system, not visible.
    Changed from MBR to GPT using Disk Manager and still not visible in new system.

    I know the problem is with partitions and FAT32 format for boot partition.....? yes? can you tell me this is the right actions :-

    Can't boot from newly cloned SSD drive-image3.jpg

    DISK0 = my current MBR OS system on 250GB drive
    DISK7 = the newly cloned OS system from disk0. This booted OK in old system. Now changed format to GPT (DiskGenius). Not booting yet in new system (UEFI).
    DISK8 = i have another drive with Win11 that boots OK in the new PC (with UEFI).

    I can see the partitions don't match. Partly due to Win10 and Win11 differences I guess? and I see partition formats (MBR/GPT) are not all the same.

    • Is this right ?
    • Is the first partition 1, not 0?
    • Do I do this all in WinPE environment?
    • Do i resize other partitions as well?

    select disk 7
    select par 1
    del par override
    create partition EFI size=100
    format quick fs=FAT32
    assign letter=Z

    Next, rebuild BCD, type:
    bcdboot D:\Windows /s Z: /f UEFI
    mountvol Z: /D

    BIG THANKS !!!!!!!!!!!!!
      My Computer

  2. Posts : 43,241
    Win 10 Pro (22H2) (2nd PC is 22H2)

    For reference:
    Convert Windows 10 from Legacy BIOS to UEFI without Data Loss

    Your disk 7 which you say is meant to be a UEFI bootable disk doesn't yet have an EFI partition.

    When it does (you appear to be aware of how to create one) then post a screenshot of that disk using
    Minitool Partition Wizard (free) - not Disk Management. Much more informative, and will show if a small partition typically 16Mb is present or not.. not shown by DM.

    Feel free to research the numerous comparable threads.
      My Computers


  Related Discussions
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd
All times are GMT -5. The time now is 13:52.
Find Us

Windows 10 Forums