Most of the hard disk drive industry, which has seen over 200 companies, has vanished through bankruptcy or mergers and acquisitions. The surviving manufacturers are Seagate, Toshiba and Western Digital, with HGST Inc. and Maxtor subsidiary companies. Drives manufactured by Fujitsu, Toshiba, Samsung and IBM are still in common use.
Seagate Technology PLC
They are an American data storage company, that was incorporated in 1978 as Shugart Technology. It is currently incorporated in Dublin, Ireland, with their main executive office in Cupertino, California, USA. Seagate developed the first 5.25″ hard disk drive in 1980, the 5MB ST-506. Much of Seagate’s growth has come from the acquisition of competitors, including Maxtor in 2006 and Samsung’s hard disk drive business in 2011.
Maxtor were founded in 1982, an American manufacturer of computer hard disk drives. They were acquired by Seagate Technology PLC in 2006, and now operate as a subsidiary of Seagate. Maxtor targeted both the server and desktop market, concentrating on disk capacity more than disk speed for desktops.
Fujitsu Ltd. is a Japanese multinational information technology equipment and services company, with their headquarters in Tokyo, Japan. In 2009, the Fujitsu HDD business was acquired by Toshiba.
Toshiba, whose headquarters are in Tokyo, Japan, are a multinational electronics conglomerate. In January 2009, Toshiba acquired the hard disk drive business from Fujitsu.
Hitachi (HGST Inc.)
Formerly known as, Hitachi Global Storage Technologies, they are now a wholly owned subsidiary of Western Digital, having been acquired in 2012. HGST was founded in 2003, from the merger of the hard disk drive businesses of IBM and Hitachi.
Samsung are a South Korean multinational conglomerate company, with their headquarters in Samsung Town, Seoul. Samsung entered the market in 1988, having previously manufactured compact disks. In December 2011, Samsung Electronics sold its hard disk drive business to Seagate.
International Business Machines Corporation (IBM)
IBM are an American multinational technology and consulting corporation, with headquarters in Armonk, New York, United States. The IBM hard disk drive business was acquired by Hitachi Global Storage Technologies in 2002, as part of a merger.
Western Digital Corporation (WDC or WD)
Western Digital are one of the largest computer hard disk drive manufacturers (along with Seagate Technology) in the world. In 2012 Wester Digital acquired HGST, which is now a subsidiary company.