Windows 10: Help with changing active partition Solved

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  1. Posts : 2,033
    Ubuntu14.04x64 MintMate17x64 Win10Prox64
       09 Aug 2016 #11

    Now, for the record, I have two drives with active partitions as well but one is an external drive. I also have a different partition structure as shown below:
    @aardvark
    FYI, you don't have 2 drives with active partitions.
    If you install Windows with GPT partition scheme. Your Boot partition is 100MB EFI System formatted as FAT32, where your BCD (Boot Configuration Data) resides in. There's no such thing as Active partition with GPT disk. EFI firmware looks for the EFI System to boot from.

    Active partition can only be marked as Active if your disk is initialized with MBR. With GPT disk, if you try to mark "Active" on any partition with diskpart, you would get an error.

    Having said that. Your Windows was installed using GPT partition scheme, your Z drive is a MBR disk and if it is a data disk then it should not be marked as "Active". However, If your Z drive contains another OS and is MBR then it must be marked as Active in order to boot from.
    Here's an example, Windows 10 was installed on Disk 0 with GPT scheme. Windows 7 was installed on disk 1 with MBR so it must be marked as Active on the System Reserved partition. This configuration is not dual boot. In order to boot Windows 7, I must change the boot order in the BIOS or use the Boot Menu for one time boot. Hope this helps !!!
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  2. Posts : 164
    Pro x64 Desktop v1607 14393.51, Home x64 Laptop v1607 14393.51
       09 Aug 2016 #12

    @topgundcp: Thanks for flexing your technical prowess but I still maintain that I have an active partition. It doesn't actually have to say active to be active. So, I don't want to play on words here and I will provide a link to a developer (who you always make reference to as your hero of sorts) where he sums it all up in a simple sentence:

    Win 10 no active partition - Windows 10 Forums
      My ComputerSystem Spec


  3. Posts : 2,033
    Ubuntu14.04x64 MintMate17x64 Win10Prox64
       09 Aug 2016 #13

    aardvark said: View Post
    @topgundcp: Thanks for flexing your technical prowess but I still maintain that I have an active partition. It doesn't actually have to say active to be active. So, I don't want to play on words here and I will provide a link to a developer (who you always make reference to as your hero of sorts) where he sums it all up in a simple sentence:

    Win 10 no active partition - Windows 10 Forums
    @aardvark
    I am sorry but I'd never reference any body as my hero, I'd praise him if his answer is correct. However, in this case, he's dead wrong by saying it as Active. The correct answer was the post after his by genet:
    Win 10 no active partition - Windows 10 Forums
    The Boot process on a GPT disk is controlled by the EFI firmware ie. Windows Boot Manager. Period.
      My ComputerSystem Spec


 
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