NVME SSD won't boot as internal storage - only as external

[TriMoon]

Hi and welcome to the Forum

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@daniel.3984

I had installed this system on an M.2 NVME SSD in a PC, then took it out and put it into a USB-C enclosure

This will change the device names and UUID’s used:

• The NVMe = /dev/nvme#n# with a UUID for the device.
• The HD in the USB-C enclosure will most likely become something like /dev/sda with a different UUID for the device.

That’s why the encrypted container will not be recognized, because of difference in configuration inside /etc/crypttab

• You should use a simple name in the first column instead of luks-ac7c561e-98e4-4bdb-a3d5-e2f2dfcb2e61
• Plus instead of UUID= in the second column use PARTUUID= or LABEL= or device name like /dev/nvme#n# or similar as appropriate for the device enclosure.

Ofcourse relecting the name in the first column in your fstab and maybe your kernel command line also…
See: man crypttab

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Please edit your OP to use codeblocks for the output of your commands, see:

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@daniel.3984

/dev/disk/by-uuid/a807f328-80d2-41f8-bb35-2b78ac41691a /run/media/daniel3984/a807f328-80d2-41f8-bb35-2b78ac41691a auto nosuid,nodev,nofail,x-gvfs-show,noauto 0 0

Do NOT mount under /run/media/ like that via fstab…