Windows 8 and 8.1 Forums


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

  1. #1

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


    I just got a Dell desktop with 8.1 installed.

    I would rather have multiple partitions, so i plan to do a clean install.

    I've done plenty of installs with MBR but this is the first tike I've seen UEFI, what a slew of partitions.

    Before I blow it all away, what benefit is there in having UEFI?

    I may want an SSD someday does that make UEFI useful?

    thanks

      My System SpecsSystem Spec

  2. #2


    Posts : 2,690
    Windows 3.1 > Windows 10


    you can have 128 partitions on a GPT UEFI disk
    4 partitions on a MBR

    run the setup disk - it will create 4 partitions - with the forth being your windows partition

    divide that partition up how you want it.. leave the other 3 alone - they have to be in that order and must be there

    350mb - 100mb - 128mb - and the windows partition
      My System SpecsSystem Spec

  3. #3


    Is the purpose of UEFI to allow all those partitions?

    What Setup disk are you referring to? The microsoft DVD won't have UEFI will it?
      My System SpecsSystem Spec

  4. #4


    Posts : 2,690
    Windows 3.1 > Windows 10


    if you look at the setup file on the disk - you will see two files - bootmgr - bootmgr.efi and also a folder "efi"

    you windows setup disk has it and if your pc supports uefi (which I know for sure it does)- it will use it instead of standard bios support

    uefi is a newer firmware version of basic BIOS

    may first suggestion is to - create a recovery drive - control panel - recovery - create recovery drive

    this will write your factory setup to a usb stick.. This is known as a "Bare Metal Reset" recovery drive..

    meaning you can write the factory image to a blank drive.. A lot of people do not do this - start messing with things - and then ask what I do wrong.. That recovery usb can prevent a lot of head acke

    we can even modifiy the reset scripts two create extra partitions and still keep the factory setup..

    when you create the recovery usb - you will find a PBR_diskpart. txt file.. this tells windows how to create the BMR bare metal reset partitions.. we just change that script to what ever we want the partition to be.. then boot the recovery usb - reset our partitions and write the factory image to the windows 8.1 partition.

    No fuss No muss - simple really
      My System SpecsSystem Spec

  5. #5


    Canada
    Posts : 1,950
    windows 8.1 Update 1 Pro 64bit


    This in a nutshell is what UEFI is. Most computers today come equipped with it::

    What is UEFI? - Windows Help

    and

    What You Need to Know About Using UEFI Instead of the BIOS
      My System SpecsSystem Spec

  6. #6


    thanks
    Quote Originally Posted by KYHI View Post
    we can even modifiy the reset scripts two create extra partitions and still keep the factory setup..
    I suppose I could just shrink the windows partition and then create the other partitions I wanted.
    will the administrative tools create additional partitions compatible with UEFI?
      My System SpecsSystem Spec

  7. #7


    Quote Originally Posted by Nuccii View Post
    This in a nutshell is what UEFI is. Most computers today come equipped with it::

    What is UEFI? - Windows Help

    and

    What You Need to Know About Using UEFI Instead of the BIOS
    thanks
      My System SpecsSystem Spec

  8. #8


    Posts : 2,690
    Windows 3.1 > Windows 10


    you are using uefi - so everything you do will be uefi

    you shrink the windows partition to create other partitions - yes.

    BUT, it will force your recovery part farther back in the partition layout. so what we'll do (if you want to keep the recovery partition) is run this command - reagentc /disable - from admin prompt.. and then reregister the recovery image later
      My System SpecsSystem Spec

  9. #9


    Quote Originally Posted by KYHI View Post
    you are using uefi - so everything you do will be uefi

    you shrink the windows partition to create other partitions - yes.

    BUT, it will force your recovery part farther back in the partition layout. so what we'll do (if you want to keep the recovery partition) is run this command - reagentc /disable - from admin prompt.. and then reregister the recovery image later
    so if I shrink and create partitions will the rcovery partition reflect the systems s it was before I repartitioned or will it get updated?
      My System SpecsSystem Spec

  10. #10


    Posts : 2,690
    Windows 3.1 > Windows 10


    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
      My System SpecsSystem Spec

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