Shugart Associates

Shugart Associates

Company type	Private (before acquisition)
Industry	Computer peripherals
Founded	1973 (1973)
Founder	Alan Shugart
Defunct	1991 (1991)
Fate	Operations ceased; brand sold to Narlinger Group in 1986
Successor	Shugart Corporation (under Narlinger Group)
Headquarters	Sunnyvale, California , United States
Products	Floppy disk drives, hard disk drives, optical drives
Parent	Xerox (1977–1986)

Shugart Associates—later known as Shugart Corporation—emerged as a prominent manufacturer of computer peripherals during the late 1970s, gaining recognition for introducing the -inch "Minifloppy" floppy disk drive. In 1979, the company unveiled the SA1000 hard disk drive form factor, designed to be compatible with existing 8-inch floppy drives.

Established in 1973 by entrepreneur Alan Shugart, the firm was purchased by Xerox in 1977. By 1986, Xerox had exited this sector, selling Shugart’s brand along with its 8-inch floppy product line to Narlinger Group, which ultimately ceased operations around 1991.

Early Years

After distinguished tenures at IBM and Memorex, founder Alan Shugart launched Shugart Associates in 1973, backed by venture capital to develop a small business system integrating floppy disk drives and printers. Following two years without a market-ready product, the company’s board redirected efforts exclusively toward floppy disk drives, prompting Shugart’s departure. He subsequently co-founded Shugart Technology (which later became Seagate Technology) in 1979.

The company introduced the -inch floppy disk drive in September 1976 as the Shugart SA400 Minifloppy, retailing at $390 per unit and $45 for a pack of ten diskettes. This model quickly dominated the market, achieving daily shipments of approximately 4,000 units.

Featuring a single-sided, 35-track design utilizing FM (single density) recording, the SA400 supported both hard- and soft-sector controllers. It provided a storage capacity of 80.6 kB on soft-sectored controllers and served as the foundation for storage solutions in early microcomputers such as the Radio Shack TRS-80 Model I and Apple II.

Late 1970s Developments

In December 1977, Xerox acquired Shugart Associates for roughly $41 million. That same year, Shugart launched the SA450—a double-sided, double-density 5¼-inch floppy disk drive offering 440 kilobytes of storage and priced at $450.

The company introduced the "Shugart Associates System Interface" (SASI) in 1979, which later evolved into the widely adopted SCSI standard by 1986. Larry Boucher led the SASI development team before departing in 1981 to establish Adaptec, an influential manufacturer of host adapters.

Also in 1979, Shugart debuted the SA-1000 series of hard disk drives, engineered with physical dimensions matching those of 8-inch floppy drives—a pioneering step toward compatibility with floppy drive form factors. By 1983, shipments surpassed 100,000 units.

1980s Era

To lower development expenditures during the early 1980s, Shugart collaborated with Matsushita Communications Inc., a Panasonic subsidiary, to produce half-height -inch drives. In 1985, as part of its withdrawal from this market segment, Xerox relinquished exclusive rights to these drives. A key factor in Shugart’s decline was its inability to develop a dependable 80-track disk drive. The firm rebranded itself as Shugart Corporation in 1983.

Towards the end of 1983, Shugart released the Optimem 1000 optical drive, providing a storage capacity of 1 GB on laser-recorded 12-inch disks at an OEM price of $6,000 per unit (for orders of 250 units). The disks themselves cost about £200 each, with plans underway to increase capacity up to 3 GB. Optimem was sold to Cipher Data in 1986 but was discontinued by around 1991.

Confronted with ongoing losses and Xerox’s financial difficulties, Xerox opted in 1985 to shut down Shugart rather than continue investing. Most operations were terminated; however, in March 1986, the floppy disk drive segment was sold to Narlinger Group, which adopted the Shugart Corporation name.

Under Narlinger’s stewardship, Shugart expanded through several acquisitions: Tandon’s line of 8-inch floppy drives in 1986; Optotech’s WORM drive technology and manufacturing plant for under $4 million in 1988; and Kennedy Company—specializing in tape and hard disk drives—in 1987. Kennedy’s assets were subsequently sold to Irwin Magnetic Systems. Shugart ceased operations approximately in 1991.

See also

• History of the floppy disk