[Solved] Converting from MBR to GPT without loosing data

Discussion in 'Windows 10' started by koma85, Feb 12, 2017.

  1. koma85

    koma85 MDL Novice

    Sep 9, 2009
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    Is it possible to migrate from MBR to GPT? I'd prefer to not reinstall everything...
    I'vce searched a little but I cannot find an howto or tool to make it simple.
     
  2. LiteOS

    LiteOS MDL Expert

    Mar 7, 2014
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  3. LatinMcG

    LatinMcG Bios Borker

    Feb 27, 2011
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    ive used Active@ boot disk then easeus partition manager to convert.. then make sure EFI folder is in root of drive (hidden or non hidden partition)
     
  4. Enthousiast

    Enthousiast MDL Tester

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    #5 Enthousiast, Feb 12, 2017
    Last edited: Feb 12, 2017
    May i be the first to ask why you want to convert, because it's only needed when you want to use a system disk >2TB or when you want to use more then 4 primary partitions on one disk.

    Separate storage disks >2TB can be GPT initiated at diskmanagement.
     
  5. Tito

    Tito Super Mod / Adviser
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  6. Tito

    Tito Super Mod / Adviser
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  7. Tito

    Tito Super Mod / Adviser
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    And the guide I mentioned above exactly does so - it helps you to convert an MBR/legacy installation to GPT/UEFI installation on the fly.
     
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  8. ahmedhelmiradi

    ahmedhelmiradi MDL Novice

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    #11 ahmedhelmiradi, Feb 13, 2017
    Last edited: Feb 13, 2017
    Yes it is possible and no data loss guaranteed. I did it many times using "MiniTool Partition Wizard" v7.5. All you have to do is choosing the disk to be converted (even if it is your one and only HD that windows already running on). It will not take a minute, ask you to restart, restart and it will be done. First boot after asking for restart don't change boot from legacy to UEFI. Second boot you must change it from legacy to UEFI, otherwise windows may not boot (windows 7 may boot, but 8.1 & 10 may not).
     
  9. Enthousiast

    Enthousiast MDL Tester

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    #12 Enthousiast, Feb 13, 2017
    Last edited: Feb 13, 2017
    That's only about basic converting any disk, for it to be able to boot uefi, there is more to do, as Tito's link will show you.

    If it is about a storage only disk, simple converting will work.

    Why would win 7 be able to boot uefi but the windows version 8.x and 10 not (they can boot uefi natively).