This past week I was the unfortunate victim of hard drive failure on my 1stgen Macbook Pro. After looking through my local NAS and finding that my most recent backup was done in April, I kicked myself a little bit. I have everything available to me to do regular backups, but like most people I am just too lazy. I decided that I wanted to try and get Time Machine to perform backups to a network share instead of a local drive. A simple terminal command was all that was needed to make my network volumes show up in Time Machine.
defaults write com.apple.systempreferences TMShowUnsupportedNetworkVolumes 1
Just changing this preference has worked for many other people, but I get the a message from Time Machine stating “The backup disk image could not be created.” Nothing on google or the apple support forums seems to give any good info on the situation.