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Coupling I/O channels for the IBM eServer z900: Reengineering required

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2 Author(s)
Gregg, T.A. ; IBM Server Group, 2455 South Road, Poughkeepsie, New York 12601, USA ; Errickson, R.K.

The IBM eServer z900 introduces new Parallel Sysplex® coupling channels that satisfy evolving requirements in a way that minimizes product and development costs. Their design also provides backward compatibility with earlier S/390® models, spans all three coupling channel design points, and anticipates future end-of-life technology issues. The original intersystem channel (ISC) design was improved, and new features added, but the core chips were retained. This paper describes the efforts that led to the improved design.

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:46 ,  Issue: 4.5 )