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AssigneeInternational Business Machines Corporation
InventorsScott B. Compton, Matthew R. Craig, Clint A. Hardy, Matthew J. Kalos, Carol S. Mellgren, John G. Thompson
Estimating the term…
One general aspect of device reservation state preservation in accordance with the present description, provides for an intermediate reservation state, referred to herein as a “peer” reservation state, which may be maintained by a storage controller in the event of a total loss of communication connectivity to the reserving host so long as a peer or partner storage controller of a mirror relationship still has communication connectivity to the host. The peer reservation state as used herein, is a reservation state intermediate between a full reservation state for a device, and a fully released state in which a reservation of the device has been completely released. Other features and aspects may be realized, depending upon the particular application.
A computer program product for use with at least one host, a primary data storage system, the primary data storage system having a primary storage controller and a primary storage drive controlled by the primary storage controller, the primary storage drive having a plurality of primary devices configured to store data, and at least one secondary data storage system, each secondary data storage system having a secondary storage controller and a secondary storage drive controlled by the secondary storage controller, the secondary storage drive having a plurality of secondary devices configured to store data, wherein the computer program product comprises a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processor of a host to cause processor operations, the processor operations comprising:
A method, comprising:
A system for use with at least one host, comprising:
Dependencies are inferred from the claim text.