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Trying to install Debian dual boot with windows 10 on SSD but I have this error message : The attempt to mount a file system with type vfat in /dev/nvme0n1p1 at /boot/efi failed I forced EFI installation, encrypted my / so I had to make a ext4 primary /boot partition (p4) and a primary EFI ESP partition (p1)

Any idea what this could be all about ?

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I had the same error on Ubuntu. I reformatted my partitions. After I reformatted my main partition I was able to install Ubuntu. I guess try reformatting all the partitions manually. The file system may be corrupted or encrypted. My file system was encrypted from a prior installation of Ubuntu.

On Ubuntu I reformatted my main partition with ext4.

Went into terminal with ctrl alt f1

Then logged in as root sudo su

Then formatted the partition 

mkfs -t ext4 /dev/sda2
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  • How does this answer OP's question?
    – Hennes
    Commented Feb 6, 2016 at 18:54
  • View edit -> "The file system may be corrupted or encrypted. My file system was encrypted from a prior installation of Ubuntu."
    – ThomasAFink
    Commented Feb 6, 2016 at 19:16

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