Update to previous comment: I have the following sata devices:
/dev/sr0 DVD /dev/sda Old250 /dev/sdb OS install disk with EFI,Boot,root,Home /dev/sdc1 MyBook external USB hard disk If /dev/sdc is unplugged Ubuntu does not boot to UI - OS disk is at /dev/sdb as it should be, partitions are mounted, however X does not start. If /dev/sda is unplugged Ubuntu does not boot to UI - OS disk is mounted as /dev/sda instead If /dev/sda is switched to a different (empty) hard disk Ubuntu boot properly. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to util-linux in Ubuntu. https://bugs.launchpad.net/bugs/1509858 Title: Ubuntu 15.10 won't boot unless external USB drive is connected Status in util-linux package in Ubuntu: New Bug description: 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1509858/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
