Parallel Iron [NPE] filed four separate suits against Bluearc, Hitachi, LSI, NetApp, and Oracle, alleging that the defendants’ file storage systems infringe a patent related to storing data across multiple servers.  Parallel Iron has filed three prior suits since January 2011 against over ten defendants including Amazon, AOL, Groupon, Hulu, IBM, Samsung, and Twitter.  The patent-in-suit was previously owned by Ring Technology before being assigned to Parallel Iron in March 2010.  4/19, District of Delaware, no judge yet assigned, 1:2012cv00500; 1:2012cv00501; 1:2012cv00502; 1:2012cv00503.