Prevent windows from splitting disk partition?

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  1. Cerawy's Avatar
    Posts : 901
    Windows 10 Home 64 bit
       #1

    Prevent windows from splitting disk partition?


    I have a single partition on my ssd that i use for everything, and it works well. However, sometimes windows will create an additional 100mb partition, which doesn't serve any purpose. How do i stop windows from doing that?
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  2. MisterEd's Avatar
    Posts : 929
    Windows 10 Pro 64-bit v21H2
       #2

    Cerawy said:
    I have a single partition on my ssd that i use for everything, and it works well. However, sometimes windows will create an additional 100mb partition, which doesn't serve any purpose. How do i stop windows from doing that?
    Windows 10 needs it so leave it alone.
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  3. dalchina's Avatar
    Posts : 33,655
    Win 10 Pro (1903) (2nd PC is 21H2)
       #3

    https://docs.microsoft.com/en-us/win...ive-partitions

    https://docs.microsoft.com/en-us/win...ive-partitions

    Info on UEFI and MBR layouts. Don't bother fighting Windows about small partitions- you might just break something. Like taking a screwdriver and spanner to a car engine and saying- I don't think I need that bit.
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  4. Ghot's Avatar
    Posts : 13,931
    Win 10 Home 10.0.19044.1387 (x64) [21H2]
       #4

    Cerawy said:
    I have a single partition on my ssd that i use for everything, and it works well. However, sometimes windows will create an additional 100mb partition, which doesn't serve any purpose. How do i stop windows from doing that?


    If left to itself, Windows will create a 100MB EFI partition, a 500MB recovery partition.
    Personally, I also think this is rather... sloppy.

    However, it's best just to get used to it. When you install Windows 10, just install it to an unallocated partition, and let Windows "do it's thing". Make sure to disconnect all other drives, except the one you are installing Windows on.
    If you don't, Windows will create those partitions anyway, and possibly place them on one of your "other" drives.

    This will cause problems, down the road.
    Last edited by Ghot; 18 Aug 2021 at 19:57.
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  5. Cerawy's Avatar
    Posts : 901
    Windows 10 Home 64 bit
    Thread Starter
       #5

    MisterEd said:
    Windows 10 needs it so leave it alone.
    For what purpose, exactly? I have everything merged in a single partition without any problems.
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  6. Ghot's Avatar
    Posts : 13,931
    Win 10 Home 10.0.19044.1387 (x64) [21H2]
       #6

    Cerawy said:
    For what purpose, exactly? I have everything merged in a single partition without any problems.

    It needs those partitions for....

    1. Recovery partition is responsible for those tools you might need at boot, if Windows won't boot.
    2. The EFI partition is the "System" partition, and usually handles the booting of Windows.
    Without the EFI partition, things like upgrading to the next operating system, don't work so well.
    There are ways around it, but it's easier to just let Windows have the EFI and Recovery partition
    3. Last of all, most tutorials here and on the web, assume you have C:\ and those two other partitions.

    And this is coming from someone who has been installing Windows on a single partition... forever.

    Also, most backup software these days, has the option to automatically back up C:\ and those two extra partitions, in one operation. I know for a fact, both Macrium and AOMEI do this. I assume other backup software does as well.
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  7. idgat's Avatar
    Posts : 1,251
    Windows 10 Pro
       #7

    Cerawy said:
    For what purpose, exactly? I have everything merged in a single partition without any problems.
    In that case, go ahead, delete it.

    Next post .... my system won't boot, how can I fix it?

    About the only partition you can delete without complications is the recovery one. Imaging is the alternative.

    If you're so desperate for 100MB of space, then a larger drive might be a better solution than tinkering with Microsoft's divine creation(s).
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  8. MisterEd's Avatar
    Posts : 929
    Windows 10 Pro 64-bit v21H2
       #8

    Should I Delete the EFI Partition?

    If you see the EFI partition and think, “There’s an extra 100 MB my computer could be using. Let’s delete it.”, don’t do that. Windows does a good job of making it hard to delete the EFI partition. But you can do it. Without the EFI, the BIOS will think Windows doesn’t exist, and the computer won’t properly start. Plus, does gaining an extra 100 MB of free drive space matter? Between cloud storage and inexpensive 1TB+ drives, we don’t need that 100 MB. Let it be.
    What Is the EFI Partition in Windows 10 and Should You Delete It?
    What Is the EFI Partition in Windows 10 and Should You Delete It?
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  9. cereberus's Avatar
    Posts : 12,602
    Windows10
       #9

    Cerawy said:
    For what purpose, exactly? I have everything merged in a single partition without any problems.
    Windows can only boot with one partition if an old legacy bios installation. It is less secure than the more modern UEFI, is limited to 4 primary partitions, and does not support secure boot.

    Many modern pcs do not support legacy bios any more, and guess what, Windows 11 requires secure boot.
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  10. Cerawy's Avatar
    Posts : 901
    Windows 10 Home 64 bit
    Thread Starter
       #10

    idgat said:
    In that case, go ahead, delete it.

    Next post .... my system won't boot, how can I fix it?

    About the only partition you can delete without complications is the recovery one. Imaging is the alternative.

    If you're so desperate for 100MB of space, then a larger drive might be a better solution than tinkering with Microsoft's divine creation(s).
    Okay. I just deleted it, and windows boots without any problems. Also, i found that having my ssd split into too many partitions causes my backup software not to know what to backup and what to recover, so it's probably best to merge them into a single partition anyway. If anyone knows how to stop windows from creating multiple partitions, please post it in this thread, thanks.
    Last edited by Cerawy; 26 Aug 2021 at 13:05.
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