Adaptec was a computer storage company and remains a brand for computer storage products. The company was an independent firm from 1981 to 2010, at which point it was acquired by PMC-Sierra, which itself was later acquired by Microsemi, which itself was later acquired by Microchip Technology.

IndustryComputer storage
FateAcquired by PMC-Sierra
Founded1981 (1981)
FounderLarry Boucher
DefunctJune 8, 2010 (2010-06-08)
ProductsRAID, host adapter 


Larry Boucher, Wayne Higashi, and Bernard Nieman founded Adaptec in 1981.[1] At first, Adaptec focused on devices with Parallel SCSI interfaces. Popular host bus adapters included the 154x/15xx ISA family, the 2940 PCI family, and the 29160/-320 family. With advancements in technology, RAID functions were added while interfaces evolved to PCIe and SAS.

On May 10, 2010, PMC-Sierra, Inc. and Adaptec, Inc. announced they had entered into a definitive agreement of PMC-Sierra acquiring Adaptec's channel storage business on May 8, 2010, which included Adaptec's RAID storage product line, the Adaptec brand, a global value added reseller customer base, board logistics capabilities, and SSD cache performance solutions.[2] The transaction was expected to close in approximately 30 days, subject to customary closing conditions.[3] Following the sale, Adaptec would retain its Aristos ASIC technology business, certain real estate assets, more than 200 patents, and approximately $400 million in cash and marketable securities.[4][5]

On June 8, 2010, PMC-Sierra and Adaptec announced the completion of the acquisition.[6][7] PMC-Sierra renamed the channel storage business "Adaptec by PMC". PMC-Sierra was in turn acquired by Microsemi in January 2016.[8]

The old Adaptec, Inc. changed its name to ADPT Corporation,[9] and then again to Steel Excel, Inc.[10] Steel Excel is now an investment firm.


Adaptec produced interface products involving SCSI, USB, IEEE 1394, iSCSI, Fibre Channel, and video.[11] Adaptec once produced CD- and DVD-burning software under the brand names of Easy CD Creator and Toast, as well as network-attached storage devices such as the Snap Server product line.

The Adaptec brand is used to sell host bus adapters, RAID adapters, SAS expander cards, cables, and accessories.[12]



  1. Hunt, Laura (August 16, 1999). "1981". Technology Flashback. Computerworld. IDG Enterprise. p. 72. ISSN 0010-4841. Retrieved May 13, 2014 via Google Books. 1981 [...] Larry Boucher founds Adaptec Inc.
  2. "PMC-Sierra Completes Acquisition of Adaptec Channel Storage Business" (Press release). PMC-Sierra. June 8, 2010. Archived from the original on March 11, 2014. Retrieved March 11, 2014.
  3. "PMC-Sierra, Form 8-K, Current Report, Filing Date May 10, 2010" (PDF). Retrieved December 30, 2012.
  4. "PMC-Sierra Announces Agreement to Acquire the Channel Storage Business From Adaptec". Archived from the original on July 12, 2012. Retrieved March 9, 2012.
  5. Adaptec Announces $34 Million Sale of RAID Storage Business to PMC-Sierra Inc.
  6. "PMC-Sierra Completes Acquisition of Adaptec Channel Storage Business". Archived from the original on July 17, 2012. Retrieved March 9, 2012.
  7. Adaptec Announces the Completion of the Sale of the Data Storage Business
  9. Adaptec Changes Its Name to ADPT Corporation
  10. ADPT Corporation Changes Name to Steel Excel Inc. and Completes Reverse/Forward Stock Split
  11. Miller, Stephen (November 7, 2002). "NEWS WATCH: DIGITAL RECORDERS; An Afterlife on Disc For That Fading Video". The New York Times. Retrieved March 11, 2014. Adaptec is one of several companies selling kits for converting analog tapes to digital video at affordable prices.
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