Public bug reported:
Hi,
I have a working installation of Ubuntu Gnome 15.10 x64.
I have an external USB drive (MyBook) that is connected all the time.
The system has been working correctly for a week, and *probably* booting
correctly even when the external drive was turned off. (I can't say 100%
whether I have booted it with the drive off before today).
In order to allow this drive to be accessed and mounted/unmounted by all users
of the system I have added it to /etc/fstab.
/dev/sdc1 /media/MyBook ext4
rw,user,nosuid,nodev,relatime,data=ordered,uhelper=udisks2
molly@molly:~$ ls -l /media
total 12
drwxr-x---+ 2 root root 4096 Oct 18 11:30 charlotte
drwxr-x---+ 2 root root 4096 Oct 25 18:26 molly
drwx------ 8 molly molly 4096 Oct 25 18:44 MyBook
However, now if I turn the drive off and reboot the system Ubuntu doesn't start
correctly.
I get the Ubuntu logo with the 'spinner' and then after a couple of minutes the
emergency mode screen.
It is very hard to get any useful information about the cause of the boot
failure once you reach this point.
The journalctl -xb command gives a vast amount of information without making it
clear what the problem is.
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: mount 2.26.2-6ubuntu3
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.19.1-0ubuntu3
Architecture: amd64
CurrentDesktop: GNOME
Date: Sun Oct 25 19:24:14 2015
InstallationDate: Installed on 2015-10-16 (8 days ago)
InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Alpha amd64 (20151016)
SourcePackage: util-linux
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: util-linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug wily
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https://bugs.launchpad.net/bugs/1509858
Title:
Ubuntu 15.10 won't boot unless external USB drive is connected
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