Win7 GPT support

Discussion in 'Windows 7' started by x86, Mar 10, 2018.

  1. x86

    x86 MDL Addicted

    Jul 8, 2011
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    I know that on a UEFI-based system, a W10 64bit fresh install will result the OS chosing GPT by default (don't know if you even get the option to opt for MBR...)

    Does anyone know from experience, what would be the case if you have a UEFI-based system, but with CSM/legacy support (enabled in BIOS) and performed a Win7 64bit installation? Would the OS still create a GPT? Or MBR? I have read that Win7 can still both read and write GPT based volumes - but can it create them during a frest installation? More importantly, can it boot from them? (if those were created beforehand)

    In other words - does GPT require a 'pure' UEFI mode in order to work? (thus, not supported by Win7)
     
  2. mehdibleu

    mehdibleu MDL Expert

    Jun 14, 2017
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    To answer your question, no GPT does not require pure UEFI to work.
    i installed win7 in UEFI with Legacy enabled on a new HD recently and i didn't need to convert the disk to GPT as i used murphy's tool that allows to detect automaically if you are using bios or UEFI then converts either on GPT or MBR automatically according to you bios configuration, so i did the installation and at the end i checked to see if the disk was in GPT and it was.
     
  3. mkuba50

    mkuba50 MDL PHP Wizard

    Nov 9, 2012
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    GPT partition table can be used only on machines supporting EFI/UEFI mode. Legacy machines can't boot from GPT disk.
     
  4. x86

    x86 MDL Addicted

    Jul 8, 2011
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    What if I don't use murphy's tool? (which I don't know what it is anyway :oops:)
    What if I did a 'stock' fresh installation? Would I still get GPT from Win7 x64 on UEFI with Legacy support enabled?
     
  5. mehdibleu

    mehdibleu MDL Expert

    Jun 14, 2017
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  6. sebus

    sebus MDL Guru

    Jul 23, 2008
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    You do not need any tool (but murphy's tool is really nice). You can do it all by hand.
    It depends how you booted the iso/usb or whatever. Default for W7 will be MBR boot & MBR disk layout (but you can make it GTP by hand). Win 7 (as stated many many times) MUST have CSM enabled, otherwise it will NOT fully boot (from any disk layout)

    Do not make such issue, where one does not exist!
     
  7. Mr.X

    Mr.X MDL Guru

    Jul 14, 2013
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