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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.

Industry Computer storage
Fate Acquired by PMC-Sierra
Founded 1981; 37 years ago (1981)
Founder Larry Boucher
Defunct June 8, 2010 (2010-06-08)
Products RAID, 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]



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