International Business Machines Corporation

Michael Allen Griese

Dennis Carl Mairet

Barrie N Harding

The present invention provides a system for configuration and running a DASD storage subsystem where the small computer system interface (SCSI) Target behavior needs to be different depending on type and characteristics of the attaching SCSI hosts. The configuration process defines the behavior by SCSI bus port through the use of bus behavior tables. Accordingly, several ports are able to operate correctly based on the hosts that attach to separate ports. In a first aspect, a direct access storage device (DASD) storage subsystem is described. The DASD storage subsystem comprises a plurality of ports, each of the plurality of ports including a table. Each of the tables defines the behavior of the particular port as a SCSI target. The DASD storage subsystem includes a mechanism for configuring the plurality of ports utilizing the tables within the ports. In a second aspect, a SCSI system is described. The SCSI system comprises a plurality of SCSI hosts and a DASD storage subsystem. The DASD storage subsystem comprises a plurality of ports. Each of the plurality of ports is coupled to one or more of the plurality of SCSI hosts. Each of the plurality of ports includes a table. Each of the tables defines the behavior of the particular port as a SCSI target. The DASD storage subsystem also includes a mechanism for configuring the plurality of ports utilizing the tables within the ports.

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Byron, MN, United States of America

Michael Allen Griese