Public bug reported:
Ubuntu 16.10
Steps to reproduce:
1. Install Ubuntu with a BTRFS root partition (/dev/sdb2 on my system).
2. After installation, convert to RAID 1 by adding another partition to the
filesystem:
$ btrfs device add /dev/sdb3 /
$ btrfs filesystem balance /
3. Reboot.
4. Stuck at initramfs prompt.
To get the system to boot I have to edit /boot/grub/grub.cfg and replace all
instances of this:
rootflags=subvol=@
with this:
rootflags=subvol=@,device=/dev/sdb2,device=/dev/sdb3
The workaround can be applied permanently by editing /etc/grub.d/10_linux and
replace this:
rootflags=subvol=${rootsubvol}
with this:
rootflags=subvol=${rootsubvol},device=/dev/sdb2,device=/dev/sdb3
Then run update-grub
** Affects: ubuntu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1660882
Title:
Can't boot from BTRFS RAID1
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