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Reliability, Availability, and Serviceability of IBM Computer Systems: A Quarter Century of Progress

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4 Author(s)
Hsiao, M.Y. ; IBM Data Systems Division laboratory, Poughkeepsie, New York 12602, USA ; Carter, W.C. ; Thomas, J.W. ; Stringfellow, W.R.

Computer systems have achieved significant progress in the areas of technology, performance, capability, and RAS (reliability/availability/serviceability) during the last quarter century. In this paper, we shall review the advances of IBM computer systems in the RAS area. This progress has for the most part been evolutionary; however, in some cases it has been revolutionary. RAS developments have been driven primarily by technological advances and by increases in functional capability and complexity, but RAS considerations have also played a leading role and have improved technological and functional capability. The paper briefly reviews the progress of computer technology. It points out how IBM has maintained or improved its systems RAS capabilities in the face of the greatly increased number of components and system complexity by improved system recovery and serviceability capability, as well as by basic improvements in intrinsic component failure rate. The paper also covers the CPU, tape, and disk areas and shows how RAS improvements in these areas have been significant. The main objective is to provide a comprehensive view of significant developments in the RAS characteristics of IBM computer systems over the past twenty-five years.

Note: The Institute of Electrical and Electronics Engineers, Incorporated is distributing this Article with permission of the International Business Machines Corporation (IBM) who is the exclusive owner. The recipient of this Article may not assign, sublicense, lease, rent or otherwise transfer, reproduce, prepare derivative works, publicly display or perform, or distribute the Article.  

Published in:

IBM Journal of Research and Development  (Volume:25 ,  Issue: 5 )

Date of Publication:

Sep. 1981

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