I managed to get the Btrfs RAID1 working (will update above post later).
But after reboot, I boot fails me yet again (I waited >10 minutes and then gave up).
I suppose at this stage it is just easier to boot from LiveUSB and see what went wrong now.
/dev/disk/by-uuid/e1d4963d-…
is the root=
disk in GRUB.
lsblk -f
after
mkdir --parents /mnt/rootfs
cryptsetup open /dev/disk/by-uuid/1a45a072-[…] rootfs
cryptsetup open /dev/disk/by-uuid/c82fca05-[…] rootfs2
nvme0n1
= Goodram SSD (a.k.a. the SSD1 that was in the laptop from the beginning)nvme0n1p1
=UUID=B33A-4C29
= EFInvme0n1p2
=UUID=1a45a072-[…]
= LUKS partition with Btrfs in RAID1UUID=e1d4963d
= Btrfs in RAID1
nvme0n1p3
=UUID=2d90af35-[…]
= LUKS partition with Swap
nvme1n1
= Samsung SSD (a.k.a. the newly added SSD2)nvme1n1p1
=UUID=44D2-04AD
= backup EFI (to be rsync’d from actual EFI)nvme1n1p2
=UUID=c82fca05-[…]
= LUKS partition with Btrfs in RAID1UUID=e1d4963d
= Btrfs in RAID1
nvme1n1p3
=UUID=2e91342f-[…]
= LUKS partition with Swap
btrfs filesystem usage -T /mnt/rootfs
after
mount /dev/mapper/rootfs /mnt/rootfs