jacob@Gandalf:/boot$ sudo dpkg -P linux-image-extra-3.16.0-77-generic
(Reading database ... 295355 files and directories currently installed.)
Removing linux-image-extra-3.16.0-77-generic (3.16.0-77.99~14.04.1) ...
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 3.16.0-77-generic /boot/vmlinuz-3.16.0-77-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.16.0-77-generic /boot/vmlinuz-3.16.0-77-generic
update-initramfs: Generating /boot/initrd.img-3.16.0-77-generic
W: mdadm: the array /dev/md125 with UUID 7b3fb0a7:e397b9d3:54c21b45:4a87d6d4
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.
run-parts: executing /etc/kernel/postinst.d/pm-utils 3.16.0-77-generic /boot/vmlinuz-3.16.0-77-generic
run-parts: executing /etc/kernel/postinst.d/unattended-upgrades 3.16.0-77-generic /boot/vmlinuz-3.16.0-77-generic
run-parts: executing /etc/kernel/postinst.d/update-notifier 3.16.0-77-generic /boot/vmlinuz-3.16.0-77-generic
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 3.16.0-77-generic /boot/vmlinuz-3.16.0-77-generic
Generating grub configuration file ...
grub-probe: error: disk `mduuid/7b3fb0a7e397b9d354c21b454a87d6d4,1' not found.
run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 1
dpkg: error processing package linux-image-extra-3.16.0-77-generic (--purge):
 subprocess installed post-removal script returned error exit status 1
Errors were encountered while processing:
 linux-image-extra-3.16.0-77-generic
jacob@Gandalf:/boot$