Windows 8 and 8.1 Forums

UEFI

  1. #11


    Posts : 1,121
    Windows 8.1 x64


    Quote Originally Posted by jds63 View Post
    About a few weeks back i bought a SSD was 512GB and i did a clean installl of Windows 8.1 Pro 64bit on it.
    Recently i noticed my BIOS Mode is UEFI. Before this upgrade to the SSD i had a 2 WD 1TB HDD and it was in Legacy Mode then.

    I know i made no changes to my BIOS, before or during this upgrade to the SSD. Just wondering what made this automatically do this, change to UEFI.
    In order for you to get the configuration you show, the install media had to have been booted into the UEFI mode.

    If you feel your bios was not set to force that option, what bios settings are you looking at to make you think it was not set to a UEFI only boot option?

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  2. #12


    N.Y.
    Posts : 2,214
    Windows 10 Pro 64bit


    Thank you i understand that part, but how did it switch ? I know system has UEFI.

    I looked for a setting in the BIOS, but i do not find one. Originally as said when i did clean install of Win8.1 with a WD HDD if i went to system information then, i saw Legacy Mode, when i go now i see UEFI. Never saw this UEFI in Boot manager then.

    Seems i do not recall doing anything different this time then last time. But i do not know as much, why i am here asking you guys.TY
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  3. #13


    N.Y.
    Posts : 2,214
    Windows 10 Pro 64bit


    Quote Originally Posted by topgundcp View Post
    O.k. i seen it where you told me to look, your are right. What is the unallocated 128MB used for ? Mine in Volume says 1MB.
    128MB is Microsoft reserved for future use. In order to see it, you have to use diskpart from the command prompt.
    Win+X->Command Prompt(Admin) then type diskpart, select disk 0, list partition
    Now tellling me another good reason have this is making more partitions ? Seems sort of useless being people did this more for HDD because took them longer to read larger partitions. SSD are much faster, seee no need for it.
    Windows and GPT FAQ (Windows Drivers)
    Thanks for the link, i had been doing some reading since i noticed this on my system.
      My System SpecsSystem Spec

  4. #14


    Posts : 1,121
    Windows 8.1 x64


    Quote Originally Posted by jds63 View Post
    Thank you i understand that part, but how did it switch ? I know system has UEFI.

    I looked for a setting in the BIOS, but i do not find one.
    All bioses seem to have different configurations for setting a UEFI or Legacy or Both boot option. It may have a CSM option, which is disabled for Windows 8 Secure boot. If it is enabled, you can still set a UEFI only boot, as you might do for Windows 7. If you have a Secure Boot setting, it might give you options for UEFI only booting.

    The H61 chipset was earlier than the Windows 8 introduction, so depending if it has been upgraded, you may see different options, or options which might even been changed by bios updates. The UEFI bios version, does make a difference also as to what options might be available. I have a Z68 motherboard which does UEFI fine, but is also not Windows 8 Secure Boot capable.
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  5. #15


    Quote Originally Posted by jds63 View Post
    BTW Thanks for responding.
    O.k. i seen it where you told me to look, your are right. What is the unallocated 128MB used for ? Mine in Volume says 1MB.

    I booted with the OS DVD and next to it was UEFI : DVD Drive. So basically by somehow selecting this, my system switched itself to UEFI ? My system unfortunately does not support secure boot.

    Now tellling me another good reason have this is making more partitions ? Seems sort of useless being people did this more for HDD because took them longer to read larger partitions. SSD are much faster, seee no need for it.

    Just trying figure out if this benefits me to keep it this way. And if i do, is it better for my EFI system.
    Well with that big of an SSD I think I would create a D:\ partition of about 1/2 of your disk space. There I would put programs and the library's Music, Download, documents pictures etc.
    one good reason is refreshing your system drive is not a problem because your data is on D: Faster back ups and images of C: creating and restoring.
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  6. #16


    N.Y.
    Posts : 2,214
    Windows 10 Pro 64bit


    Thanks for all the replies, but i looked through the BIOS with a fine toothed comb, i see nothing that i know of that will change this to Legacy. Although one option i question months back was i believe not having to do with this was PCI ROM in Legacy, have to check this again make sure i worded it right.

    Readings says should be a choice in boot order , when i press F8 at boot, for either say UEFI for DVD or one without it.

    Basically i choice this i would say, somehow by accident, why i came to ask if it is best just left alone for Windows 8.1 Pro 64bit.
    I did not choose it so i could want more partitions, reading about it is most peoples reasons to choose GPT.
    Whether MBR or GPT either seems o.k. on UEFI, i know MBR is old standard.

    Last BIOS update was 2012, long story go into, but also no major improvements to try any, most will say do not flash a BIOS unless there is any. As said, do not support Secure boot, which be good with i assume GPT also.

    Now when i put DVD in i do not think i saw another option for DVD Drive, without UEFI, could look again, this would be only if i am looking to go back to the way it was with a HDD before without GPT.
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  7. #17


    N.Y.
    Posts : 2,214
    Windows 10 Pro 64bit


    Alright i did check the boot options during booting by pressing F8 with OS DVD in.

    DVD Drive
    DVD Drive w/OS DVD
    boot manager
    Generic Multicard
    Crucial SSD
    UEFI: DVD drive

    So when i did this clean install i most likely chose the UEFI: DVD Drive, reason it switched the BIOS Mode to UEFI.
    As i believe said by other members here.

    Again, nothing in BIOS pertaining to this, on EZ Mode screen see the boot order as UEFI Boot Manager, Crucial SSD and DVD Drive.

    Does not seem to boot any faster in this way. Shutdown pretty quick, say less then 10 sec., cold boot or restart takes 35-40 sec.
    this could depend on other factors also.

    Well figured how i got here. Oh that thing i mentioned before PCI ROM Priority, set to Legacy ROM, other choice is EFI Compatible ROM. Not sure what this is anyway or has to do with this topic.
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  8. #18


    Quote Originally Posted by jds63 View Post
    Thanks for all the replies, but i looked through the BIOS with a fine toothed comb, i see nothing that i know of that will change this to Legacy. Although one option i question months back was i believe not having to do with this was PCI ROM in Legacy, have to check this again make sure i worded it right.

    Readings says should be a choice in boot order , when i press F8 at boot, for either say UEFI for DVD or one without it.

    Basically i choice this i would say, somehow by accident, why i came to ask if it is best just left alone for Windows 8.1 Pro 64bit.
    I did not choose it so i could want more partitions, reading about it is most peoples reasons to choose GPT.
    Whether MBR or GPT either seems o.k. on UEFI, i know MBR is old standard.

    Last BIOS update was 2012, long story go into, but also no major improvements to try any, most will say do not flash a BIOS unless there is any. As said, do not support Secure boot, which be good with i assume GPT also.

    Now when i put DVD in i do not think i saw another option for DVD Drive, without UEFI, could look again, this would be only if i am looking to go back to the way it was with a HDD before without GPT.
    Well one way to look at it is this, BIOS MBR is considered Legacy now! All new equipment is coming UEFI GPT! some of the UEFI interfaces have very friendly graphical BIOS like options. Its not new, new equipment has been being put out UEFI since at least 2012 my first experience with it and available since 2009 at least as per my Asus P7P MB. I put in a 3TB HD and it automatically put it GPT. Technology keeps moving along and we adapt.
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  9. #19


    N.Y.
    Posts : 2,214
    Windows 10 Pro 64bit


    Quote Originally Posted by Clintlgm View Post
    Quote Originally Posted by jds63 View Post
    Thanks for all the replies, but i looked through the BIOS with a fine toothed comb, i see nothing that i know of that will change this to Legacy. Although one option i question months back was i believe not having to do with this was PCI ROM in Legacy, have to check this again make sure i worded it right.

    Readings says should be a choice in boot order , when i press F8 at boot, for either say UEFI for DVD or one without it.

    Basically i choice this i would say, somehow by accident, why i came to ask if it is best just left alone for Windows 8.1 Pro 64bit.
    I did not choose it so i could want more partitions, reading about it is most peoples reasons to choose GPT.
    Whether MBR or GPT either seems o.k. on UEFI, i know MBR is old standard.

    Last BIOS update was 2012, long story go into, but also no major improvements to try any, most will say do not flash a BIOS unless there is any. As said, do not support Secure boot, which be good with i assume GPT also.

    Now when i put DVD in i do not think i saw another option for DVD Drive, without UEFI, could look again, this would be only if i am looking to go back to the way it was with a HDD before without GPT.
    Well one way to look at it is this, BIOS MBR is considered Legacy now! All new equipment is coming UEFI GPT! some of the UEFI interfaces have very friendly graphical BIOS like options. Its not new, new equipment has been being put out UEFI since at least 2012 my first experience with it and available since 2009 at least as per my Asus P7P MB. I put in a 3TB HD and it automatically put it GPT. Technology keeps moving along and we adapt.
    So your saying i am better off with this setup then MBR ? I read enough about it. No great advantages, except if want a bigger drive then 2TB, or ability to make more partitions, booting from UEFI instead of BIOS.

    Not much of it right now is to my advantage, something i read about being more secure with how it rights tables on drive compared to MBR, something about writing 2 so if one gets corrupted.
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  10. #20


    Posts : 4
    windows 8.1 x64


    I've got a problem, I tried to install win 8.1, but my laptop has UEFI BIOS, so I made my USB bootable as ept for uefi bios (according to rufus' tutorial), I also had to disable uefi boot mode in bios (or something like that), I booted windows installation from usb, and I formatted my only partition (there are only left system and samsung_rec partitions) and it said "on efi system windows can only be installed to gpt disks" and I can't click on next button.
    Please help me, what should I do? I am a total noob, so I'm going to need as simpler as possible tutorial
      My System SpecsSystem Spec

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