~$ sudo update-initramfs -u
update-initramfs: Generating /boot/initrd.img-4.4.0-97-generic
cryptsetup: WARNING: failed to detect canonical device of /dev/md1
cryptsetup: WARNING: could not determine root device from /etc/fstab
W: mdadm: the array /dev/md1 with UUID d097b7cd:55b147b1:1f51fb89:78ee93fe
W: mdadm: is currently active, but it is not listed in mdadm.conf. if
W: mdadm: it is needed for boot, then YOUR SYSTEM IS NOW UNBOOTABLE!
W: mdadm: please inspect the output of /usr/share/mdadm/mkconf, compare
W: mdadm: it to /etc/mdadm/mdadm.conf, and make the necessary changes.
W: mdadm: the array /dev/md3 with UUID 55838ec0:8ea6a071:1f51fb89:78ee93fe
W: mdadm: is currently active, but it is not listed in mdadm.conf. if
W: mdadm: it is needed for boot, then YOUR SYSTEM IS NOW UNBOOTABLE!
W: mdadm: please inspect the output of /usr/share/mdadm/mkconf, compare
W: mdadm: it to /etc/mdadm/mdadm.conf, and make the necessary changes.