View Full Version : failed to extend <filename> Read-only file system

11th February 2014, 06:05 PM
I was backing up a VirtualBox .vdi file to a network server, and about 2 hours into the copy process I get the error in the subject line:

failed to extend VB-Win7.vdi Read-only file system

I cannot find any explanation on what this means. I have written to this location many times and can do so currently, so it isn't read-only.