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Can I use MBR to boot Windows 10

Discussion in 'Operating Systems' started by greeny187, Jul 15, 2019.

  1. greeny187

    greeny187 New Member

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    I have a M.2 installed on my MSI motherboard. Can I use MBR to run the OS or must I have to use GPT format. Need some advice.

    Thanks.
     
  2. anticupidon

    anticupidon Ancient Guru

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    You could.
    But for an M.2 SSD GPT is what the doctor said.
     
  3. Astyanax

    Astyanax Ancient Guru

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    MBR is fine for sub 3TB disks.
     
  4. RealNC

    RealNC Ancient Guru

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    It's rare to find motherboards these days that still have UEFI booting bugs, so I'd recommend GPT nowadays.
     

  5. greeny187

    greeny187 New Member

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    Thanks for all the suggestions guys.

    Basically, my system configurations -

    * Intel i5-9600K with 16G ram
    *Z390-A-Pro
    *MSI RTX 2070
    *Boot drive is a Adata NVMe ADATA SX8200PNP
    *3 X 4TB Toshiba HDDs

    With the above, can I format the Adata using MBR with the rest of the HDDs in GPT format?
    Or, use all the drives in MBR format.
     
  6. Athlonite

    Athlonite Maha Guru

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    Is there some reason you need to have your boot drive in MBR rather than GPT
     
  7. epguy19

    epguy19 Active Member

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    GPT for 64bit Win10 AND UEFI [PCs & motherboards made in late 2012 or newer]
    MBR for 32bit Win10 with traditional/legacy BIOS (or UEFI-CSM)
    MBR for 64bit Win10 and legacy BIOS (non-UEFI) - I have some really old PCs running Win10 with this config that don't use UEFI
     
  8. Watcher

    Watcher Ancient Guru

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    I was wondering the same thing?
     
  9. RealNC

    RealNC Ancient Guru

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    Buggy mainboard firmware that doesn't do garbage collection on the EFI variables. Long story, but this results in not being able to boot when an OS writes new boot entries. Happened to me in the past after a Windows update. Modern mainboards should be fine though.
     
  10. Watcher

    Watcher Ancient Guru

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    If this is the Motherboard https://www.asus.com/ca-en/Motherboards/TUF-Z390-PRO-GAMING/ that greeny187 is referring too, there is no reason this motherboard wouldn't boot from a GPT formatted disk?

    Windows and GPT FAQ

    https://docs.microsoft.com/en-us/previous-versions/windows/hardware/design/dn640535(v=vs.85)#gpt_faq_is_uefi_required

    Should you select MBR or GPT when you install a new drive?

    https://archive.techarp.com/showarticle83f6.html?artno=812&pgno=0
     
    Last edited: Jul 17, 2019

  11. rvail623

    rvail623 New Member

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    The Windows installation (USB thumb drive) media may limit the ability to install the operating system in one of two UEFI bios mode settings:
    1. CSM enabled: required for "Legacy" (MBR) partition mode.
    2. CSM disabled: required for GPT partition mode.
    If the free 3rd party software "Rufus" is used to create the Windows installation media, then certain options need to be selected, in order to assure creating a bootable USB thumb drive in CSM enabled vs. CSM disabled mode.
    If a bootable burned DVD is created from the Windows .iso file, then it should be able to cope with either CSM enabled or CSM disabled mode.
     

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