Storage system with multiple copy targeting
AssigneeInternational Business Machines Corporation
InventorCarlos F. Fuente
Life of this patent
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Abstract
A storage controller, cooperable with host computer apparatus, and a plurality of controlled storage apparatus, comprises a host write component operable to write a data object to a source data image at one of the plurality of controlled storage apparatus; a first copy component responsive to a first metadata state and operable to control copying of the data object to a first target data image at one of the plurality of controlled storage apparatus; a second copy component responsive to a second metadata state and operable to perform one of: controlling copying of the data object to a second target data image at one of the plurality of controlled storage apparatus; and causing the first copy component to perform copying of the second target data image to the first target data image.
Claims7
A method comprising:
- writing, by a host write component, a data object to a source data image at one of a plurality of controlled storage apparatus;
- copying by a first copy component a source image grain to a first target data image at one of said plurality of controlled storage apparatus, wherein said source image grain is a region of a disk;
- and
- responsive to a first metadata state, performing a step selected from a group consisting of:
- controlling copying of source image grains that are to be updated to a second target data image at one of said plurality of controlled storage apparatus;
- and
- causing said first copy component to perform copying of a second target data image grains that are to be updated to said first target data image.
Dependencies are inferred from the claim text.