List of defunct hard disk manufacturers

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Diagram of consolidation

At least 223 companies have manufactured hard disk drives.[1] Most of that industry has vanished through bankruptcy or mergers and acquisitions. None of the first four entrants continue in the industry today.[2] Only three manufacturers have survived: Seagate, Toshiba and Western Digital (WD)—all of which grew at least in part through mergers and acquisitions.

Partial list of defunct manufacturers[edit]

Some of the defunct manufacturers include:

See also[edit]


  1. ^ The Bulgarian manufacturer ISOT manufactured a 10 MB harddisk drive CM 5508 in 1989. It seems to have been used in the Iskra-1030 personal computer built in 1989 as well. The CM 5508 drive was also available under the ИЗОТ name.


  1. ^ * Maleval, Jean-Jacques (2013-03-28). "HISTORY: List of 221 Companies in HDD Manufacturing Since 1956". Retrieved 2017-03-27.
  2. ^ a b c d e Hess, Herman (1964). "A Comparison of the Characteristics of Modern Discs and Tapes". Disc File Applications. Nation's First Disc File Symposium. Detroit, Michigan: American Data Processing Inc. pp. 60–70. 64-23108.
  3. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac Corporate Systems Center Hard Drive Bible, Edition VIII, 1996, ISBN 0-9641503-1-X
  4. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax ay az ba bb bc bd be bf bg bh bi bj bk bl bm bn bo McKendrick, David (November 1997). "Sustaining Competitive Advantage in Global Industries: Technological Change and Foreign Assembly in the Hard Disk Drive Industry". Archived from the original on 2014-02-09. Retrieved 2011-08-03.
  5. ^ "Company Summary: Areal Technology". LinkSV.
  6. ^ - acquired by Seagate in 1983"Seagate Agrees To Acquire Atasi". The New York Times. October 14, 1983. Retrieved October 28, 2021.
  7. ^ Alper, Alan (1986-11-10). "Merger fallout puts Memorex across Atlantic". Computerworld. XX (45): 1, 8. Retrieved 2011-08-03.
  8. ^ Upton, Molly (1973-10-31). "Caelus Plans 3336-11-Type Disk, Will 'Wait and See' on Winchester". Computerworld. VII (44): 34. Retrieved 2017-03-27.
  9. ^ InfoWorld Media Group, Inc. (27 January 1986). "InfoWorld". InfoWorld: The Newspaper for the Microcomputing Community. InfoWorld Media Group, Inc.: 18–. ISSN 0199-6649.
  10. ^ Advertisement in Datamation, Feb 1970, p. 217
  11. ^ Storage Search on Cornice
  12. ^ a b c d Comstock, George E. (2003-08-13). Hendrie, Gardner (ed.). "Oral History of George Comstock" (PDF). Mountain View, California, USA: Computer History Museum. CHM X2727.2004. Archived (PDF) from the original on 2017-03-23. Retrieved 2017-03-23.
  13. ^ "Toshiba : Press Release (30 Apr, 2009): Toshiba and Fujitsu Conclude Definitive Agreement on HDD Business Transfer".
  14. ^ "HP Computer Museum".
  15. ^ Smith, Ryan (2012-03-06). "Western Digital To Sell Hitachi's 3.5" Hard Drive Business To Toshiba, Complete Hitachi Buyout". AnandTech. Archived from the original on 2017-04-02. Retrieved 2012-12-30. Western Digital will be allowed to acquire Hitachi's 2.5" and SSD businesses, but not the 3.5" business. Instead Western Digital will be selling that business to Toshiba – factories and all – along with granting licenses for the necessary patents, which would allow Toshiba to effectively continue in the 3.5" market from where Hitachi left off. This would firmly establish Seagate, Western Digital, and Toshiba as the 3 major players in the hard drive business across all product segments.
  16. ^ "Toshiba and Western Digital Swap HDD Manufacturing Facilities - X-bit labs". Archived from the original on 2016-03-03. Retrieved 2014-09-26.
  17. ^ "Toshiba Acquires WD HDD Manufacturing Equipment and Transfer of HDD Manufacturing".
  18. ^ Coughlin, Tom. "A very long engagement -- Western Digital finally acquires Hitachi's HDD Business". Forbes.
  19. ^ Information Technology Industry TimeLine Archived 2013-10-02 at the Wayback Machine, see 1971 entry
  20. ^ 1985 Disk/Trend Reports - Rigid Disk Drives, p. MFGR-10
  21. ^ 1989 Disk/Trend Report - Rigid Disk Drives, p. MFGR-10
  22. ^ Librascope Series L107 Disc Memory System
  23. ^ 1987 Disk/Trend Report - Rigid Disk Drives, p.MFGR-11 M
  24. ^ 1987 Disk Trend Report - Rigid Disk Drives, p. MFGR-25
  25. ^ Disk/Trend Reports - Rigid Disk Drive, 1982 - 1987
  26. ^ "Another OEM doesn't go to the devil". Computerworld (Advertisement): 32. 1973-10-31. Retrieved 2017-03-27.
  27. ^ 1983 Disk/Trend Report - Rigid Disk Drives, p. MFGR-8
  28. ^ "Seagate Completes Acquisition of Samsung's Hard Disk Drive Business" (Press release). Seagate Technology. 2011-12-19. Archived from the original on 2017-03-27. Retrieved 2015-08-19.
  29. ^ Sylvester, David (1987-02-17). "Priam moves offshore in bid for survival". The Journal of Commerce. Retrieved 2017-03-28.

Further reading[edit]

  • Wong, Poh-Kam (July 1999). "The dynamics of the HDD industry development in Singapore" (PDF). Centre for Management of Innovation and Technopreneurship, National University of Singapore: The Information Storage Industry Center, Graduate School of International Relations and Pacific Studies, University of California. Report 99-03. Archived from the original (PDF) on 2012-07-17. Retrieved 2017-03-27.
  • "硬盘" [Hard disk manufacturers] (in Chinese and English). Archived from the original on 2016-12-06. Retrieved 2017-03-30. - lists 126 HDD manufacturers including 3 current ones.