• Linux
• Btrfs
• UbuntuExt4ToBtrfs

Linux/Btrfs/UbuntuExt4ToBtrfs

• 2021-02 Ubuntu install cant setup root btrfs.
  1. Install ubuntu from usb, on single /dev/sda2 ext4. (sda1 is efi partition)
  2. Once bootable, boot again from live usb, and convert ext4 to btrfs
     • btrfs-convert /dev/sda2

  3. Setup fstab, grub, initram-fs for boot into btrfs

     mount /dev/sda2 /mnt
     mount -t proc /proc /mnt/proc
     mount --rbind /dev /mnt/dev
     mount --make-rslave /mnt/dev
     mount --rbind /sys /mnt/sys
     mount --make-rslave /mnt/ys
     
     chroot /mnt /bin/bash
     
     mount /boot/efi
     grub-install /dev/sda
     update-initramfs -u
     # err fix uuid for / in /etc/fstab
     apt install btrfs-tools
     update-initramfs -u