Disk drive with improved error correction code

摘要: A rotating disk data storage subsystem is disclosed for recording and retrieving in blocks of predetermined finite length, each block including an error correction code syndrome portion calculated accordance with a Galois field algorithm. The includes controller unitary, cyclic generator/decoder processing incoming byte the said algorithm manner which tests presence any errors generates values from may be located corrected. microprocessor has access to testing determine if generator determined block, so, obtaining values. programmed process location nature at least one error, having buffer memory whereby removed corrected substituted its place.