fat32 efi partition on OS disk and bootloader showing in bios

  1. m0nk3n's Avatar
    Posts : 142
    windows 10 Pro x64
       #1

    fat32 efi partition on OS disk and bootloader showing in bios


    after i put a friends laptop hd in my computer and fixed his. i have a strange little 99MB fat32 efi volume\partition on the OS disk. and i never saw it before. and i have 2 boot loaders in bios. wont boot without one of them being selected.

    is it supposed to be there? can i remove it?

    and what can i do about the boot loaders? does fixmbr work?
    Last edited by m0nk3n; 05 Jul 2016 at 17:40.
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  2. m0nk3n's Avatar
    Posts : 142
    windows 10 Pro x64
    Thread Starter
       #2

    is it safe to use the delete volume override in diskpart on the hidden 99mb fat32 on the os drive? that's my closest thought. since it's the os drive and i like this computer i wont do anything i dont know can damage it :)
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  3. NavyLCDR's Avatar
    Posts : 13,226
    Windows 10 Pro
       #3

    Do you still have two hard drives connected? Also, you need to post a screenshot of disk management so we can see what you have. Be sure to widen the columns so we can see all the information in the columns.

    Disk Management - How to Post a Screenshot of - Windows 10 Forums
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  4. m0nk3n's Avatar
    Posts : 142
    windows 10 Pro x64
    Thread Starter
       #4

    what do you mean with 2 hard drives connected? i'm just done with using samsung migration software to clone the ssd 840 series over to a ssd 840 evo. here is a screen shot of disk management. while you read this i will reboot and unplug all the drives which is not the OS hd and see if it will boot only with the ssd with the OS
    .fat32 efi partition on OS disk and bootloader showing in bios-disk-management.png

    Edit: it booted with only the os ssd.
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  5. m0nk3n's Avatar
    Posts : 142
    windows 10 Pro x64
    Thread Starter
       #5

    also i got this for you if it's interesting :)
    fat32 efi partition on OS disk and bootloader showing in bios-cmd-diskpart.png
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  6. NavyLCDR's Avatar
    Posts : 13,226
    Windows 10 Pro
       #6

    The 99mb FAT32 partition is where the computer is booting from - it has to stay there. The partition marked as "system" contains the boot files. The partition marked as "boot" contains the operating system that is loaded by the boot files. I know - Microsoft labeled them bass ackwards, in my humble opinion.
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  7. Kyhi's Avatar
    Posts : 3,108
    Windows 3.1 to Windows 10
       #7

    diskpart is showing 1 gpt disk

    disk management is showing 6 of them....

    but as stated the disk is GPT and has the windows OS - so yes the partition has to be there...
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  8. m0nk3n's Avatar
    Posts : 142
    windows 10 Pro x64
    Thread Starter
       #8

    the cmd windows is from after i disabled all the other hdd's. thought of something. this is not a laptop. this is my pc. is there always a recovery partition? since i didn't make one. i had a clean install and i can't remember having that until after i fixed my friends laptop. i put his laptop hdd in the computer. and on windows 10 is the efi-partition "included"?(i guess it is) :)

    and what can i do with the 2 boot manager present in bios? never saw them there before.
    without selecting either of the boot manager in bios called "boot manager" as first i can't boot.
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  9. NavyLCDR's Avatar
    Posts : 13,226
    Windows 10 Pro
       #9

    A clean install of Windows 10 will create a recovery partition. The "boot manager" entry in UEFI is the EFI System Partition that the computer boots from.

    EasyUEFI will help you identify and rename what the UEFI boot entries are:
    UEFI boot manager, Windows To Go Creator, All-in-One Microsoft Windows Setup software - The EasyUEFI Development Team
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