A month ago, Network Appliance sued Sun Microsystems, alleging the server and software company's ZFS file system infringes seven NetApp patents. Sun on Thursday fired back with a suit that claims NetApp violates 12 of Sun's.
Sun's suit also argues that NetApp's patents are invalid and that it doesn't infringe them anyway. And it requests an injunction prohibiting the company from selling any products that infringe Sun's patents.
Patent suits are often expensive and acrimonious proceedings, and they're particularly unpleasant when fought among Silicon Valley rivals who often share mutual customers and sometimes … Read more