International Business Machines Corporation

Charles Richard Lanzi

Chan Y Ng

James C Chen

The present invention provides a method and system for detecting corrupted data of a plurality of hard disk drives (HDDs) in a data storage subsystem. In this system a predetermined number of fixed blocks within each of the HDDs emulate a track of a first track format. The predetermined number of fixed blocks provide a logical track. The logical track of one of the plurality of HDDs is generated by the others of the plurality of HDDs. The plurality of logical tracks forming a plurality of track groups. In a first aspect the method and system comprises assigning each of the plurality of logical tracks an address translation (ADT) number, comparing each of the ADT numbers of the plurality of logical tracks to an expected value until a mismatch occurs in a logical track, and determining if other logical tracks in a same track group have accurate ADT numbers. The first aspect further includes reconstructing the logical track if the other tracks within the same track group have accurate ADT numbers. In a second aspect the method and system comprises determining each of the plurality of logical tracks is formatted in accordance with first track format, comparing each of the formats of the plurality of logical tracks to the expected format until a mismatch occurs in a logical track, and determining if other logical tracks in a same track group have accurate first track formats. The second aspect includes reconstructing the logical track if the other tracks within the same track group have accurate first formats.

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San Jose, CA, United States of America

Charles Richard Lanzi