I am having the same problem concerning /dev/root on Ubuntu 14.04LTS on my VPS. It worked fine when I did a trial install in a VirtualBox machine under Windows.
Creating the symlink ( /dev/xvda in my case) helped. But when I rebooted, the problem came back..
Is there a way of creating the link so it persists across boots (or have it created in a startup file)?
SOLVED I put "ln -s /dev/xvda /dev/root" into /etc/rc.local before the "exit 0" statement.
My VPS system:
(Ubuntu 14.04 LTS, Kernel 3.15.4-x86_64, Apache 2.4.7, MySQL 5.5.38, PHP 5.5.9, ISPConfig 220.127.116.11p5, Webmin, PureFTP & Quota, phpMyAdmin, postfix, dovecot, amavis, clamav, spamassassin, awstats, fail2ban, Jailkit, bind9, vlogger, webalizer)
Last edited by Nap; 23rd July 2014 at 13:42.