Importance

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Abstract

Method and apparatus directed to a computer system including a host computer and an intelligent storage system that stores data accessed by the host computer, the computer system including a plurality of logical volumes of data that are visible to the host computer and the storage system and that are perceived by the host computer as comprising a plurality of raw storage devices, the storage system including a plurality of physical storage devices and at least one mapping layer that maps the plurality of logical volumes to the plurality of physical storage devices so that the data in each of the plurality of logical volumes is stored on at least one of the plurality of physical storage devices. One aspect of the invention is directed to providing the host computer with information identifying, for at least one of the plurality of logical volumes, which ones of the plurality of physical storage devices store data included in the at least one of the plurality of logical volumes. The host computer can use this information in configuring data blocks among the plurality of logical volumes.

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First Claim