The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 02, 1996
Filed:
Feb. 08, 1995
Robert A Ellis, Woodland Park, CO (US);
Clark E Lubbers, Colorado Springs, CO (US);
Steven J Malan, Woodland Park, CO (US);
Peter Rivera, Colorado Springs, CO (US);
Sid Snyder, Colorado Springs, CO (US);
David W Thiel, Colorado Springs, CO (US);
Richard B Wells, Colorado Springs, CO (US);
Digital Equipment Corporation, Maynard, MA (US);
Abstract
A data storage system using a RAID array and a logging process and apparatus that identifies a parity block that may not contain the proper parity for its associated data blocks and which prevents such inconsistent parity information from being used in the regeneration of unavailable data. A small fraction of the blocks of each disk are dedicated to storing parity metadata bits. The parity metadata is associated with the parity blocks and identifies whether or not each parity block contains the proper parity information for its associated data blocks or may contain invalid information. The data integrity of the RAID array is preserved by preventing the generation of undetected corrupt data.