[K12OSN] SOLVED: No root device found, boot has failed, sleeping forever

[Jeff Siddall]

I discovered through much head scratching that network boot failures 
resulting in "no root device found" can be caused due to a missing /proc 
directory in the client image.

This happened to me when I restored a client image backup, but because 
my backup script excludes /proc it was missing altogether in the 
restored image.  Unfortunately this causes dracut to throw up the 
significantly incorrect "no root device found" message, even if the root 
filesystem is successfully mounted.

Jeff