/home empty in decrypted partition

English Install/Boot/Login
1

Hello,

I am trying to recover the data in /home from a failed 15.2 to 15.3 upgrade.
By using the rescue disk, I can see the computer’s HDD and its 2 partitions:

/dev/nvme0n1p2, fat 16, flags: boot, esp
/dev/nvme0n1p2, encrypted lvm2 pv, mount point system, flags: lvm

I then mounted nvme0n1p2 using crypsetup luksOpen /dev/nvme0n1p2 foo

I can now access all the files in the hard drive, but the /home folder has no files in it. The HDD was messed up by the system update, and that does not delete any file in /home, so what am I missing?
How can I get access to /home again?

Any help would be greatly appreciated

2

Show /etc/fstab from your root partition.

3

“/home” is a subvolume. You will need to separately mount that subvolume to see what’s there.

4

How do I mount a subvolume? after

crypsetup luksOpen /dev/nvme0n1p2 foo

I haver tried:
mount /dev/mapper/foo/home /mnt/hdd

but it does not work, it gives the error:
special device /dev/mapper/foo/home does not exist (a path prefix is not a directory)

which address should I use for the subfolder?

5

I’m not sure of the details, as I am not using “btrfs”. That’s why you were asked for content of “/etc/fstab” for the mounted system.

It is something like:


mount -o subvol=@home /dev/nvme0n1p2 /mnt/home

where “/mnt” should be replaced by wherever you mounted the root file system. But check the “fstab” in the mounted system for other details.

6

that unfortunately generates the error unknown filesystem type ‘crypto_LUKS’
So I guess now the question is how to mount a BTRFS encrypted subvolume?

this is my fstab:


/dev/system/swap  swap                    swap   defaults                      0  0
/dev/system/root  /                       btrfs  defaults                      0  0
/dev/system/root  /.snapshots             btrfs  subvol=/@/.snapshots          0  0
/dev/system/root  /var                    btrfs  subvol=/@/var                 0  0
/dev/system/root  /usr/local              btrfs  subvol=/@/usr/local           0  0
/dev/system/root  /tmp                    btrfs  subvol=/@/tmp                 0  0
/dev/system/root  /srv                    btrfs  subvol=/@/srv                 0  0
/dev/system/root  /root                   btrfs  subvol=/@/root                0  0
/dev/system/root  /opt                    btrfs  subvol=/@/opt                 0  0
/dev/system/root  /home                   btrfs  subvol=/@/home                0  0
/dev/system/root  /boot/grub2/x86_64-efi  btrfs  subvol=/@/boot/grub2/x86_64-efi  0  0
/dev/system/root  /boot/grub2/i386-pc     btrfs  subvol=/@/boot/grub2/i386-pc  0  0
UUID=41D6-3391    /boot/efi               vfat   defaults                      0  2
7

The “fstab” info tells you:


mount /dev/system/root -o subvol=/@/home /mnt/home

except change the “/mnt” part to wherever you mounted the root partition.

8

Yes, that solved the issue, thanks a lot!