There is a new MP added to the downloads section that will monitor file shares on a Windows Server.   The MP is designed to discover any file shares on the server (not including the hidden $ shares) and monitor the availability of the shares.  The monitors are initially disabled so you will need to override the monitor to activate it. 

We would like to thank and credit Jaime Correia for creating this MP and sharing it with Systemcenterforum.org!

You can retrieve this MP from the downloads section or from here.