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The EFI system partition (ESP) is a partition on a data storage device (usually a hard disk drive or solid-state drive) that is used by computers adhering to the Unified Extensible Firmware Interface (UEFI). What that means is that the EFI Partition is an interface for the computer to boot windows off of. its like a step taken before it runs ...
As a reference, Ubuntu installer name the partition EFI System Partition, while Windows 10 names it EFI system partition, with lowercase s and p. Some vendors using pre-made HDD images also label the underlying FAT32 filesystem as SYSTEM. ESP is another reasonable filesystem label (just avoid EFI). And remember that, as @RodSmith pointed out ...
REM Choose the appropriate disk number from the list. If you're unsure, you can open diskmgmt.msc; the numbers will be the same. sel disk 0. list part. REM Perform the following only if you need to shrink a partition to make space for the EFI partition. REM Choose the appropriate partition from the list.
Open an Administrator Command Prompt window by right-clicking the Command Prompt icon and selecting the option to run it as Administrator. In the Command Prompt window, type mountvol P: /S. (You can change P: to any unused drive letter; that's arbitrary.) Use the Command Prompt window to access the P: (EFI System Partition, or ESP) volume.
For Linux, in terminal, run sudo fdisk -l to find out the sector size of your storage drive. Since the EFI partition is formatted as FAT32, the minimum partition size of FAT32 drive is calculated as sector_size x 65527. For modern storage that is 512 bytes x 65527 = 32 MiB. The EFI boot manager executable is around 125 KiB, so the 32 MiB ...
If the partition contains an EFI/Microsoft/Boot directory with a bootmgfw.efi file, that's Windows. If it doesn't contain such a file, it definitely is not used by Windows. Now that you know which partition is the Windows one, you can use fdisk or gdisk or cfdisk to delete partitions from the other disk.
Some users choose to put the EFI partition at /boot, making configuration a little bit easier for Linux-only systems. But when dualbooting – even if it's two different Linux distros – I suggest having the EFI partition at /boot/efi. A separate /boot is usually unnecessary.) The EFI partition is required if you want to boot your system in ...
Start →Right click Powershell → Run as administrator. Open diskpart: diskpart. Identify the EFI partition showing up in Explorer: list volume. Select the EFI partition (replacing the X with the correct drive letter): select volume X. Remove the EFI partition's drive letter (replacing the X with the correct drive letter):
BitLocker must use a system partition that is separate from the Windows partition. The system partition: Must be configured as the active partition. Must not be encrypted or used to store user files. Must have at least 100 megabytes (MB) of space. Must have at least 50 MB of free space. May be shared with a recovery partition.
DISKPART> list disk -- List disks. DISKPART> sel disk 1 -- Choose disk. DISKPART> list part -- List partitions. DISKPART> det disk -- List partitions again, to make sure. DISKPART> sel part XYZ -- Choose a partition. DISKPART> del part override -- Delete it. Share. Improve this answer.