Error: /sbin/mingetty: hvc0: cannot open tty: No such device or address - CentOS 6

I get this annoying error message on some of my servers which fills up the /var/log/messages file. My solution for this is to edit the /etc/sysconfig/init file, removing it on this line:

# What ttys should gettys be started on?
ACTIVE_CONSOLES="/dev/tty[1-6] /dev/hvc0"

You will need to reboot to make the messages go away! Restarting init using 'telinit u' is not enough! Or you can just create the device file using mknod!

# mknod -m 600 /dev/hvc0 c 5 1