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I have a Lenovo ThinkPad T440 running Windows 10 Pro 64bit in UEFI/GPT mode. The disk manager shows there are 4 partitions on the HDD. They are 1000MB WINRE_DRV (recovery) NTFS, 260MB SYSTEM_DRV (EFI System Partition) FAT32, 889GB Windows10_OS (C:) NTFS, and 14GB PBR_DRV (Lenovo Recovery) NTFS.

Under DISKPART, list volume command shows all these 4 volumes. However using command mountvol in CMD shows only 3 volumes with GUID. The 260MB SYSTEM_DRV (EFI System Partition) in FAT32 format is missing. Can somebody explain it to me why? And how to make it show up with the mountvol command?

a superuser MAOIZM in Sep 3 in this link shows that he can make it happen, how How to access efi partition on windows 10?

Thanks

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You can do the following to access the ESP in Windows:

  1. Open an Administrator Command Prompt window. (Right-clicking the Command Prompt option in the Start menu and selecting "Run as Administrator" should do this.)
  2. Type mountvol S: /S. This mounts the ESP as S:. (You can change S: to anything you like.)

The resulting mount will be valid only within that Administrator Command Prompt window, though, which can be limiting, especially if you want to use GUI file-management tools or access the ESP from GUI programs. If there's a way to access the ESP in Windows using GUI tools, I don't know what it is.

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