I have a Ubuntu 16.04 based VM, it sometimes boots into Emergency mode. The problem is it is not a frequent thing, once it goes into emergency mode and I issue reboot command it boots back up normally, but after few reboots it shows emergency mode again.
Just before it boots into emergency mode I can see on the console "Timed out waiting for device dev-disk-by\x2du\some\some".
After this the message dependency failed for /data. Dependency failed for local file system. Then after a few service starts. Enter root password to enter Maintenance mode or press Ctrl+D to continue.
This keeps happening on and off. I disabled squid service which was seen starting just before the dependency message but no use. The problem I am unable to find what dependency is failing. One reboot the issue > > is present the next its gone.
On checking logs via journalctl -xb. It shows local-fs.target failed.journatctl log
This is the screen just before I get the prompt for emergency mode. Disk fail before boot in emergency mode
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More information needed. Please post the full output you get when it boots into emergency mode.– Dominic MotukaMar 20, 2018 at 17:47
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@daumie I have edited the post to include the screenshot after which I get a prompt for root password to enter emergency mode. Just an FYI the squid service its trying to stop and shows a countdown, I uninstalled squid after that.– user6863772Mar 21, 2018 at 15:08
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1 Answer
My Ubuntu had a similar problem as I'd removed an USB drive without removing the /etc/fstab entry. Once I commented the usb drive line out and rebooted every thing was ok. Perhaps your drive is not ready when the VM boots. See if you can attach it after boot.
