Electrical computers and digital processing systems: memory – Storage accessing and control – Shared memory area
Patent
1997-03-24
1999-07-20
Cabeca, John W.
Electrical computers and digital processing systems: memory
Storage accessing and control
Shared memory area
711124, 711154, 711163, 395500, 39518304, G06F 1300
Patent
active
059268336
ABSTRACT:
A method and system are provided which allow heterogeneous computing systems to have direct access to the same data storage areas on a shared data storage subsystem such that the method and system are transparent to the heterogeneous computing systems. The method and system achieve the foregoing via the following steps. A data storage subsystem controller queries all computing systems having direct access to the same data storage areas of a shared data storage subsystem as to the operating systems utilized by such computing systems. In response to answers received in response to the queries, the data storage subsystem controller creates and stores meta-data which associates each computing system having direct access with whatever operating system is running on each computing system having direct access. In response to a request from a computing system having direct access for access to a data storage area within the shared data storage subsystem, the data storage subsystem controller retrieves the stored meta-data associated with the computing system which is requesting access to a data storage area within the shared data storage subsystem. The data storage subsystem controller utilizes the retrieved meta-data to correctly interpret and respond to the request for access to a data storage area in a manner consonant with the operating system of the computing system which is requesting access to a data storage area within said shared data storage subsystem.
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Rasoulian Behrouz
Recio Renato John
Cabeca John W.
Dillon Andrew J.
Henkler Richard A.
International Business Machines - Corporation
Musgrove Jack V.
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