David Earle Roberson

David E. Roberson has served as a Class A Director since the consummation of our initial public offering in December 2005. Since May 2007, Mr. Roberson has served as senior vice president and general manager of the StorageWorks Division of Hewlett-Packard Company. Prior to that, he served as president and chief executive officer and as a member of the board of directors of Hitachi Data Systems from April 2006 until May 2007. From April 2004 until April 2006, Mr. Roberson served as president and chief operating officer of Hitachi Data Systems, and from April 2000 until April 2004 he served as its chief operating officer. Mr. Roberson received a bachelor's degree in Social Ecology from the University of California, Irvine and a law degree from Golden Gate University School of Law in San Francisco, California. Mr. Roberson also studied financial management at Harvard Business School.