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:
Oct. 15, 2002
Filed:
Jun. 25, 1999
Krishna Rameshwara Malakapalli, Burnsville, MN (US);
Kinhing Paul Tsang, Plymouth, MN (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
Data integrity is increased on mass-storage devices through a scheme whereby, a frame-based cyclic redundancy code (CRC) for each sector is recorded. A frame-based CRC is generated from the CRCs of the frames that compose a sector of data. In recording data, a CRC is generated from each frame, later, a master CRC is generated from the frame CRCs, then sector and master CRC are recorded on the mass-storage device medium. In retrieving data, the sector composed of frames and a master CRC are read, a plurality of CRCs are generated from each of the frames, a second master CRC is generated from the frame CRCs, and the master CRCs are compared to determine data integrity. In another embodiment, an input/output error detection and correction checksum (IOEDC), an error correction code (ECC) and a CRC are generated from a sector of data, and the IOEDC, ECC and CRC are stored on disc with the data sector.