Amdahl Corporation

Amdahl Corporation was an American information-technology company founded in 1970 by Gene Amdahl, a former IBM engineer and the chief architect associated with IBM's System/360. The company became one of the most significant independent competitors in the high-end mainframe market by producing systems that were compatible with IBM mainframe software and peripherals while offering different economics and engineering choices. Amdahl's principal proposition was not to replace IBM software ecosystems, but to provide customers with another source of hardware capable of running the same workloads. Its systems were designed to be plug-compatible with contemporary IBM System/360 and System/370 environments. Compared with IBM's offerings, Amdahl machines often emphasized higher performance, lower acquisition cost, smaller physical footprints, and simpler installation. Air-cooled designs were a notable practical advantage because they could avoid the chilled-water infrastructure required by some IBM systems. This combination of compatibility and alternative pricing made Amdahl one of the few companies able to compete credibly with IBM in the very high-margin enterprise-computing sector. The company's first production machine arrived in 1975. The Amdahl 470/V6 became an important early product, incorporating virtual-memory support and high-performance circuit technology. Later 470-series systems added faster processors, cache memory, virtualization capabilities, upgrade paths, and variable-speed operation that allowed customers to pay for higher performance when needed. The company also developed systems regarded as supercomputers and competed indirectly with specialist vendors such as Cray Research in some performance-sensitive applications. Amdahl benefited from the availability of IBM-compatible software under changing antitrust and licensing conditions. Customers could continue using established IBM operating environments and peripherals while purchasing systems from Amdahl. At its peak, the company held a substantial share of the worldwide mainframe market and became a particularly strong competitor in certain regional markets. It also developed a services business, including maintenance of IBM-compatible equipment, after IBM's ability to withhold service from customers using Amdahl systems was challenged by market and regulatory developments. As enterprise computing changed during the 1980s, Amdahl broadened its activities beyond central processors. It introduced communications controllers, direct-access storage subsystems, data communications products, Unix and open-systems software, application-development tools, consulting, and educational services. The company explored proprietary operating-system projects, but ultimately discontinued its Aspen effort and concentrated on Amdahl UTS, its Unix offering. These initiatives reflected management's recognition that dependence on a narrow mainframe-hardware portfolio was increasingly risky as Unix workstations, distributed systems, and later x86 servers gained ground. Amdahl maintained a close relationship with Fujitsu, which invested in the company during its formative period and later became an increasingly influential shareholder and technology partner. A proposed combination with storage manufacturer Storage Technology Corporation failed after Fujitsu objected, while Amdahl subsequently permitted Fujitsu to acquire a larger ownership position. Fujitsu completed its acquisition of Amdahl in 1997, making the company a wholly owned subsidiary. Amdahl's products, technologies, and customer operations were subsequently absorbed into Fujitsu's enterprise-computing activities. The independent Amdahl company eventually ceased operating as a standalone business. Its historical significance rests on making IBM-compatible mainframes a commercially credible alternative and on demonstrating that customers could obtain enterprise-class compatibility without purchasing directly from IBM.

Gene Amdahl left IBM in early 1970 after working on the Advanced Computer Systems project and on concepts related to System/360-compatible high-performance computing. He and former ACS colleagues established Amdahl Corporation to pursue an alternative approach: rather than designing an extremely dense and costly machine, they developed a modular architecture using standardized cards and automated circuit-routing methods. Early financing was difficult because investors considered a direct challenge to IBM unusually risky. Fujitsu and Nixdorf provided critical investment, with Fujitsu becoming an enduring technology and ownership partner. IBM's System/370 announcements shaped Amdahl's initial product strategy. Amdahl targeted the upper end of the System/370 family with machines intended to run IBM software and use IBM-compatible peripherals. Its engineers worked with Fujitsu on high-speed emitter-coupled-logic circuits and distinctive air-cooling technology. The resulting design avoided the chilled-water infrastructure associated with some competing systems while delivering strong processing performance in a smaller installation. The first Amdahl 470V/6 was delivered in 1975, and demand led the company to expand production. The 470V/6-II, 470V/5, and 470V/7 followed in the late 1970s, while the 470V/8 introduced cache and hardware-supported virtualization. The company's competitive position was strengthened by software-licensing and antitrust developments surrounding IBM. Amdahl systems could run established IBM mainframe software, allowing customers to preserve applications and operational practices while changing hardware suppliers. Amdahl also supported IBM-compatible peripherals and eventually provided maintenance services for IBM equipment attached to Amdahl systems. The company became one of IBM's most credible competitors in high-end mainframes and reached a meaningful share of the global market. Amdahl's next-generation 580 effort became a strategic and organizational turning point. Gene Amdahl favored a faster single-processor design, while other engineers and Fujitsu advocated multiprocessor architecture. Amdahl left in 1979 to establish Trilogy Systems, and the company subsequently developed the multiprocessor 5860, 5870, and 5880 systems. A proposed merger with Memorex did not proceed. A more advanced plan to combine with Storage Technology Corporation was approved by both companies' boards but collapsed after Fujitsu objected. During the 1980s, Amdahl diversified into communications controllers, storage subsystems, Unix and open-systems software, data communications, application-development products, consulting, and training. It ended the Aspen proprietary operating-system project in 1987 and emphasized Amdahl UTS instead. These changes could not fully offset the structural shift away from proprietary mainframe hardware toward Unix and distributed computing, followed later by x86-based systems. The company suffered heavy losses in the early 1990s and carried out successive layoffs and restructuring measures. Fujitsu's ownership increased over time. In 1997, Fujitsu acquired all remaining shares and made Amdahl a wholly owned subsidiary. The brand and its operations were gradually incorporated into Fujitsu's enterprise-computing organization. Amdahl no longer exists as an independent company, but its systems remain important in the history of IBM-compatible mainframes and enterprise-computing competition.

• 1997

  Fujitsu completes acquisition

  [1]Amdahl Corporationen.wikipedia.org

  Fujitsu acquires all outstanding shares of Amdahl and makes it a wholly owned subsidiary.

• 1987

  Aspen project is discontinued

  [1]Amdahl Corporationen.wikipedia.org

  Amdahl ends development of its proprietary Aspen operating system and concentrates on Unix-oriented software.

• 1982

  6000 storage products are introduced

  [1]Amdahl Corporationen.wikipedia.org

  The company enters the direct-access storage subsystem market with its 6000 series.

• 1980

  470V/8 and communications products arrive

  [1]Amdahl Corporationen.wikipedia.org

  Amdahl ships the 470V/8 and begins delivery of its 4705 communications controller.

• 1979

  Gene Amdahl leaves the company

  [1]Amdahl Corporationen.wikipedia.org

  Strategic disagreements over single-processor and multiprocessor architectures precede Gene Amdahl's departure.

• 1978

  470V/7 deliveries begin

  [1]Amdahl Corporationen.wikipedia.org

  The 470V/7 enters shipment as Amdahl's response to IBM's System/370 3033 generation.

• 1977

  Second-generation 470 models are announced

  [1]Amdahl Corporationen.wikipedia.org

  Amdahl introduces the 470V/6-II, 470V/5, and 470V/7 to cover multiple performance levels and compete with IBM's newer systems.

• 1975

  First 470V/6 system is delivered

  [1]Amdahl Corporationen.wikipedia.org

  The first production Amdahl mainframe is installed at NASA Goddard Space Flight Center.

• 1971

  Early financing secures Fujitsu and Nixdorf investment

  [1]Amdahl Corporationen.wikipedia.org

  Fujitsu and Nixdorf provide crucial early capital after conventional financing proves difficult to obtain.

• 1970

  Amdahl Corporation is founded

  [1]Amdahl Corporationen.wikipedia.org

  Gene Amdahl establishes the company to develop high-performance systems compatible with IBM mainframe software and operating environments.

An alternative enterprise-computing supplier offering IBM-compatible mainframes with competitive performance, pricing, reliability, installation requirements, and customer choice.

• IBM-compatible mainframe · 1975

  Amdahl 470/V6

  Amdahl's first major production mainframe family. The 470/V6 was designed to run IBM System/370 software and support compatible peripherals while using Amdahl's own processor and packaging technology. Its air-cooled architecture reduced installation complexity compared with water-cooled alternatives, and its performance and pricing made it a credible choice for large enterprises, government agencies, universities, and other mainframe users.

• IBM-compatible mainframe · 1977

  Amdahl 470V/6-II

  An enhanced 470 model announced in 1977. It offered higher performance than the original 470V/6 and formed part of Amdahl's effort to provide a graduated product range comparable with IBM's high-end System/370 offerings. The system supported Amdahl's upgrade-oriented commercial model and retained compatibility with established IBM mainframe environments.

• IBM-compatible mainframe · 1977

  Amdahl 470V/5

  A smaller 470-family system using related circuitry and offering a lower entry point into Amdahl's mainframe environment. It was positioned for customers that wanted IBM compatibility at a lower system scale, while providing a defined upgrade route to more powerful Amdahl configurations.

• IBM-compatible mainframe · 1977

  Amdahl 470V/7

  A high-end 470-series system developed to compete with IBM's 3033 generation. It extended Amdahl's strategy of matching IBM software compatibility while differentiating through system engineering, performance, physical installation requirements, and pricing.

• IBM-compatible mainframe · 1980

  Amdahl 470V/8

  A 1980-generation mainframe incorporating high-speed cache memory and hardware-based virtualization known as the Multiple Domain Facility. These capabilities improved workload flexibility and reinforced Amdahl's position as a technically sophisticated alternative for IBM-compatible enterprise computing.

• Multiprocessor mainframe

  Amdahl 580 series

  A family of next-generation systems that moved Amdahl into large-scale multiprocessor computing. The range included the 5860, the 5870 with an attached processor, and the 5880 full multiprocessor system. Their architecture reflected the company's response to growing performance requirements and the influence of Fujitsu engineering after Gene Amdahl's departure.

• Communications controller · 1980

  Amdahl 4705

  A communications-control product that extended Amdahl beyond central processors and into the peripheral infrastructure surrounding IBM-compatible mainframes. It was part of the company's 1980s effort to capture additional enterprise-system value through compatible communications and data-processing equipment.

• Direct-access storage subsystem · 1982

  Amdahl 6000

  A storage-product family introduced as Amdahl expanded into disk and related enterprise storage systems. The series complemented the company's mainframes and addressed the fact that large customers typically purchased storage and peripheral equipment alongside central computing capacity.

• Unix operating system

  Amdahl UTS

  Amdahl's Unix operating-system offering, emphasized after the company abandoned its Aspen proprietary operating-system project. UTS represented the company's attempt to participate in the broader open-systems and Unix markets as enterprise computing began moving beyond traditional proprietary mainframe architectures.

• 1997

  Fujitsu acquisition of AmdahlM&A

  Background

  Amdahl's dependence on a shrinking proprietary-mainframe market and its long-standing relationship with Fujitsu shaped the company's ownership transition.

  Action taken

  Fujitsu acquired the remaining shares and converted Amdahl into a wholly owned subsidiary.

  Aftermath

  Amdahl's operations and technology were progressively integrated into Fujitsu's enterprise-computing activities, ending the company's independent corporate identity.

  Source

• 1987

  Shift from Aspen to UnixStrategy

  Background

  Amdahl's proprietary Aspen operating-system project had consumed development effort while the market was increasingly favoring Unix and other open systems.

  Action taken

  The company terminated Aspen and redirected its software strategy toward Amdahl UTS and Unix-related products.

  Aftermath

  The decision supported broader diversification but did not reverse the long-term decline of Amdahl's independent hardware business.

  Source

1. 1Amdahl Corporationen.wikipedia.org