International Business Machines Corporation

Yair G Chuchem

Ofir Zohar

Shemer Schwartz

Efri Zeidner

Adi Goldfarb

Zohar Zilberman

Exemplary method, system, and computer program embodiments for performing deterministic data verification by a storage controller are provided. Each of a plurality of concurrent write tasks is configured to be placed in a plurality of overlapping data storage ranges by performing at least one of: implementing a data generation function for generating pseudo-random data using a data seed, and generating a range map, the range map utilized as a lookup data structure to verify a chronological order for performing the plurality of concurrent write tasks, wherein a data address space is first designated in the range map as undetermined. Each of a plurality of read tasks is analyzed by comparing data read from a sub range in the plurality of overlapping data storage ranges against the data seed associated with the sub range.

Deterministic data verification in storage controller

A method for storing data blocks, including forming the data blocks into groups comprising N&#xb7;M data blocks, where N and M are different positive integers. For every group, the N&#xb7;M data blocks are assigned to correspond to elements of an array comprising N rows and M columns. A respective parity block is calculated for each of the N rows and M columns, to form (N+M) parity blocks. The resulting (N+M) parity blocks and N&#xb7;M data blocks are stored in respective storage devices.

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Omer, Israel

Yair G Chuchem