I was swapping disks in my Ubuntu Zesty and forgot to remove the
/etc/fstab entry for the old disk.
The reboot process hung for a moment when trying to mount the missing disk, then resumed, went through the NICs configuration and halted when it was unable to raise a
It asked to either go into maintenance mode (busybox) by giving the root password, or continue the boot process (which did not continue but hung indefinitely).
I did not make the link initially, but commenting out the missing disk in
/etc/fstab fixed the issue. This is reproducible every time.
There is therefore a hard (stopping) dependency between the availability of a disk and the ability to start a network bridge.
- what could there be a reason to have one?
- how can I check where it is configured?