Redundant I/O interconnect

Authors:
U. Helmich;M. Becht;M. J. Becht;J. R. Easton;R. K. Errickson;T. Gehrmann;S. G. Glassen;S. R. Greenspan;F. Koeble;H. Lehmann;C. Mayer;J. S. Nikfarjam;F. A. Schumacher;W. Storz
Affiliations:
-;-;-;-;-;-;-;-;-;-;-;-;-;-
Venue:
IBM Journal of Research and Development
Year:
2007

Citing 11
Cited 2

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Reducing planned outages for book hardware maintenance with concurrent book replacement

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Overview of IBM zEnterprise 196 I/O subsystem with focus on new PCI express infrastructure

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Abstract

The outstanding reliability, availability, and serviceability (RAS) characteristics of IBM mainframe computers are among the features that gained the IBM eServerTM family its reputation as a leading platform for business-critical applications. The aim now is to further improve IBM System z9® RAS by introducing redundant I/O interconnect (RII) as a building block of enhanced book availability and recovery scenarios. RH provides a means of maintaining I/O connectivity during planned or unplanned outages in a way that is transparent to the operating system and customer applications. The mechanism that meets this requirement is the provision of an alternate path to the I/O cage, which provides high-bandwidth I/O slots to enable a higher number of I/O ports per card. This paper discusses the I/O subsystem hardware and firmware aspects of RII.