Udev/Upgrade Guide

This page only lists changes, which you need to consider before updating or will break your system.

udev 181
Since this version udev depends on files in. If you have on a separate partition, you must boot your system with an initramfs which pre-mounts.

There are many tools to create such a initramfs:
 * genkernel
 * Dracut
 * See the initramfs article for more solutions

External resources

 * http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken