US 7,454,686 B2Granted

Apparatus and method to check data integrity when handling data

AssigneeInternational Business Machines Corporation

InventorsSteven T. Broadbent, Michael H. Hartung, Carl E. Jones, Karl A. Nielsen, Jeremy M. Pinson

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Abstract

An apparatus and method to check integrity when handling data. The method provides a storage array which includes a plurality of sectors. The method defines (N) data state identifiers and (N) parity state identifiers. The method receives a command to handle data, where that command designates a target sector. The method determines the data state identifier assigned to the target sector, determines the parity state identifier assigned to the target sector, and compares the data state identifier and the parity state identifier. If the method determines that the data state identifier and the parity state identifier are the same, the method performs the command to handle data. Alternatively, if the method determines that the data state identifier and the parity state identifier differ, the method generates an error message.

Claims10

Dependent claims

A method to check data integrity when handling data, comprising the steps of:

providing an information storage array which includes an information storage array comprising a plurality of sectors;
defining (N) data state identifiers and (N) parity state identifiers wherein N is greater than or than or equal 1;
receiving a command to handle data, wherein said command designates a target sector, and wherein said target sector comprises one of said plurality of sectors;
determining the data state identifier assigned to said target sector, wherein said data state identifier comprises one of said (N) data state identifiers;
determining the parity state identifier assigned to said target sector, wherein said parity state identifier comprises one of said (N) parity state identifiers;
comparing said data state identifier and said parity state identifier;
when said data state identifier and said parity state identifier are the same, performing said command;
when said data state identifier and said parity state identifier differ, generating an error message.

5 more elements

Dependencies are inferred from the claim text.