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Practical software reuse for IBM System z I/O subsystems

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5 Author(s)
Webb, A.M. ; IBM Research Division, Thomas J. Watson Research Center, P.O. Box 704, Yorktown Heights, New York 10598, USA ; Mansell, R. ; Knight, J.W. ; Greenspan, S.J.
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The design and implementation of the z/VM® SCSI (Small Computer System Interface) I/O subsystem is described. z/VM is an operating system that provides multiple virtual IBM System z™ machines on a single IBM System z computer. The approach adopted herein allows the reuse of entire device drivers from AIX 5L™, a completely different operating system, essentially unchanged. AIX 5L is the IBM UNIX® operating system for the IBM System p™ platform. The design, and much of the implemented code that allows the incorporation of such “foreign” device drivers, is independent of both z/VM and AIX 5L and could potentially be used in other operating system environments.

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:51 ,  Issue: 1.2 )

Date of Publication:

Jan. 2007

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