International Business Machines Corporation

Timothy Clyde Sample

James Arthur Fisher

Anthony Andrew Lambert

Christine Lynette Telford

Dennis Paul Martinez

Tom Owen Pringle

Frank David Gallo

Vickie Lynn Brewer

Jeffrey Wayne Pilch

Thomas Holderness Daily

Ralph Thomas Jackson

A device, method, and system for switching library managers of a data library while maintaining data library storage devices online. A library manager accepts and executes data transaction commands for access to data residing on the storage devices of the data library. A transition manager module receives a directive to transition library management functions from a first library manager to a second library manager. The transition manager module stops the first library manager from accepting new data transaction commands while maintaining the storage devices online. The first library manager may execute previously accepted data transaction commands. The transition manager module suspends the library management functions of the first library manager and activates the library management functions of the second library manager. The storage devices of the data library may complete data transaction commands throughout the library manager transition.

Apparatus, system, and method for switching data library managers

Method for switching data library managers

A method to coordinate requests submitted to a data storage and retrieval system from two or more operator input stations, whereby an initialization request comprising a requested operation is provided at a first time to the data storage and retrieval system. At that first time the method provides a current history of previously-submitted commands to perform the requested operation. The method also generates a request history token at that first time. The first history is displayed to the user. The user then determines if the current history includes the requested operation. If the first history does not include the requested operation, the user at a second time submits a command to perform the requested operation. The method generates at that second time a current history token, and determines if the current history token matches the request history token. If the current history token matches the request history token, then the method performs the requested operation.

Apparatus and method to coordinate requests provided to a data storage and retrieval system

In an automated retrieval library with virtual storage for identifying particular cartridges in the library to protect the data in the virtual volume from overwriting in import and export operations. A convenience input/output station is set to an import mode with export/import virtual tape servers. Possible import cartridges are categorized upon insertion to prevent their access by the host computer. Recovery from erroneous identification is provided.

Method and article of manufacture for inserting volumes for import into a virtual tape server

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Tucson, AZ, United States of America

Timothy Clyde Sample