Attune Systems, a Santa Clara start-up offering a way to manage network server files with virtualization technology, said it has received $14 million in a new venture funding round led by RWI Ventures.

The value of the company increased with the latest round, it said.

Also participating in the round were GF Private Equity Group as a new investor, and existing investors Alloy Ventures, QTV Capital, Rock Creek Capital and Shea Ventures.