Windows 8 and 8.1 Forums


re-install win 8. what is uefi and do i need it

  1. #11


    Posts : 2,690
    Windows 3.1 > Windows 10


    rem == ResetPartitions-UEFI.txt ==
    select disk 0
    convert gpt

    rem == Windows RE Tools Partition 1 ==
    create partition primary size=350
    format quick fs=ntfs label="WINRE"
    assign letter="T"
    set id=de94bba4-06d1-4d40-a16a-bfd50179d6ac
    gpt attributes=0x8000000000000001

    rem == System Partition 2 ==
    create partition efi size=100
    format quick fs=fat32 label="SYSTEM"
    assign letter="S"

    rem == Microsoft Reserved (MSR) Partition 3 ==
    create partition msr size=128

    rem === Windows Partition 4 ===
    create partition primary
    shrink minimum=10240
    format quick fs=ntfs label="WIN_OS"
    assign letter="W"

    rem == Recovery Image Partition 5 ==
    create partition primary
    format quick fs=ntfs label="PBR_IMAGE"
    assign letter="R"
    set id=de94bba4-06d1-4d40-a16a-bfd50179d6ac
    gpt attributes=0x8000000000000001


    this is a common reset partition diskpart script above and below I highlighted the windows partition portion

    rem === Windows Partition 4 ===
    create partition primary
    shrink minimum=10240
    format quick fs=ntfs label="WIN_OS"
    assign letter="W"

    you notice that it says shrink - which means the windows partition was told to use all the remaining disk space and then shrink by 10GB which left room for the recovery partition..

    rem === Windows Partition 4 ===
    create partition primary size=10240
    format quick fs=ntfs label="WIN_OS"
    assign letter="W"

    in the above - I now told it to set size of windows partition to 10GB

    we can do this 124 times.. not sure why we would..

    create the recovery usb...


    rem === Windows Partition 5 ===
    create partition primary size=10240
    format quick fs=ntfs label="WIN_7"
    assign letter="F"

    rem === Windows Partition 6 ===
    create partition primary size=10240
    format quick fs=ntfs label="WIN_vista"
    assign letter="G"

    rem === Windows Partition 7 ===
    create partition primary
    shrink minimum=10240
    format quick fs=ntfs label="WIN_10"
    assign letter="H"

    rem == Recovery Image Partition 8 ==
    create partition primary
    format quick fs=ntfs label="PBR_IMAGE"
    assign letter="R"
    set id=de94bba4-06d1-4d40-a16a-bfd50179d6ac
    gpt attributes=0x8000000000000001


    And then we can modify another file resetconfig.xml to tell it where to put the recovery image and what partition to put windows
    Last edited by KYHI; 04 Dec 2014 at 16:35.

      My System SpecsSystem Spec

  2. #12


    Quote Originally Posted by KYHI View Post
    don't know for sure - haven't tested that..
    BPR creates a diskpart script for the partitions - not sure how it will be written after..

    But create a recovery stick before. then you can worry about after
    OK, doing that now!
      My System SpecsSystem Spec

  3. #13


    Posts : 209
    Windows 8.1 (HOME not Pro) 64bit


    sorry to just jump in but I'm about to install windows 8.1 64x on a m.2 ngff mini ssd card..

    I also have secureboot and uefi enabled.. don't i need to create a uefi enabled usb boot disk to install uefi.. ?
      My System SpecsSystem Spec

  4. #14


    Posts : 2,690
    Windows 3.1 > Windows 10


    Quote Originally Posted by bassfacer22 View Post
    sorry to just jump in but I'm about to install windows 8.1 64x on a m.2 ngff mini ssd card..

    I also have secureboot and uefi enabled.. don't i need to create a uefi enabled usb boot disk to install uefi.. ?
    Nothing special to do - the windows setup media disk/usb will contain the files needed to boot UEFI
      My System SpecsSystem Spec

  5. #15


    Posts : 1,925
    Windows 8.1 Pro


    UEFI is a replacement for the old BIOS.

    The old BIOS was extremely limited, and was stuck in a tiny amount of memory, and a text-only display with standard dos-like interrupts. It could only use MBR partitions, with a maximum of 4 partitions and 2TB of maximum addressability of 2TB.

    UEFI is a modern firmware that allows rich GUI interfaces, advanced functionality (there are even complete OS's that run in UEFI without having to boot the whole OS). It allows many more partitions, and much larger hard disk sizes, integrated network and RAID functionality, lightning fast POST (power-on self-test), etc...

    You want UEFI. Although it does complicate multi-boot situations, it's worth the complication.
      My System SpecsSystem Spec

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re-install win 8. what is uefi and do i need it
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