Seagate Technology, the world's largest maker of hard drives, said Monday it is shuttering one of two manufacturing facilities in Northern Ireland, resulting in a cut of 780 employees, about 1.5 percent of the company's global work force. The company is closing a 10-year-old plant in Limavady in County Derry that manufactures substrate materials used in disks for hard drives, Seagate spokesman Woody Monroy said. Monroy did not know how much money the company would save from the move but said it is part of Seagate's ongoing effort to streamline operations. "It's no longer competitive from a business standpoint" to keep the Limavady plant open, Monroy said.