Need some help creating a new EFI Systeam Partition

  1.    10 Aug 2018 #1

    Need some help creating a new EFI Systeam Partition

    Current OS: Windows 10
    Currently my windows has a 100 MB efi system partition, however, I would like to create a bigger one instead (550 MB) so that when I install Archlinux as a dual boot, I could utilize systemd-boot as a simple way of booting both operating systems. However, because doing it this way, a minimum size of 550 MB is recommended for the EFI system partition because arch's linux kernel as well as initrd will be put onto the partition as well.

    so far i have created a new efi system partition of 550 mb by using diskpart in windows, and it's properly formated as fat32, however while browsing the web for the next step, i came across two methods found in another thread.
    Moving / recreating EFI partition - Page 2 - Windows 10 Forums

    in which one guy said to use bcdboot X:\windows /s S:
    (where X is the volume letter where window OS resides, and S: is where the newly created efi system partition just created)

    whereas, another person said to use xcopy to copy the stuff from the old efi system partition to the newly created efi system partition

    do they both work? which would you guys recommend? and furthermore, say i've properly managed to create this new efi system partition and delete the old one, is there even any way to reclaim that 100 MB that was used for the old efi system partition?

    or should i use easyuefi? it seems to have the ability to move efi system partition, but without knowing whether it works or not and how reliable it is, i'm afraid to use it.

    here is a picture showing window's Disk Management:
    Click image for larger version. 

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    80.00 GB is what i allocated for archlinux
    the 550 MB EFI system partition is the newly created
    100 MB is the old EFI system partition
    C: 151.75 GB is where my windows OS resides
      My ComputerSystem Spec

  2. Caledon Ken's Avatar
    Posts : 12,316
    Windows 10 Pro x64 Build 1809
       10 Aug 2018 #2

    Hi formos. Welcome to the TenForums @formos

    I would follow Kyhi's instruction from first link moving / recreating EFI.

    Kyhi very much knows what he is doing.

    Before executing please ensure you have a full system Image available should something go south.
      My ComputerSystem Spec

  3.    11 Aug 2018 #3

    I would just use the bcdboot command. You can use a program such as MiniTool Partition Wizard Free to delete the old 100mb EFI system partition and then add the unallocated space to the front of C: drive ... depending on where the hidden MSR partition is, though.
      My ComputerSystem Spec


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