By Brian X. Chen December 20, 2011 3:30 pm December 20, 2011 3:30 pm Seagate Technology, a major maker of hard drives, said Tuesday that it had closed on the acquisition of the hard drive business of Samsung Electronics for $1.4 billion. The merger, which was announced in April, is both a talent and product acquisition, Seagate said. The agreement gives Seagate select elements of Samsung’s hard dr