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Pointer Collection and Reporting for Error Recovery Procedures Branching

IP.com Disclosure Number: IPCOM000117898D
Original Publication Date: 1996-Jul-01
Included in the Prior Art Database: 2005-Mar-31

Publishing Venue

IBM

Related People

Authors:
Bailey, CE Bentley, SR Paranjape, SM West, SC [+details]

Abstract

Disclosed is a method of condensing many different types of error pointers in a multi-track magnetic tape system for use by the Pointer Control Circuit (PCC) of the Error Correction Code (ECC) decoder. Error pointers are categorized according to their type (definite or possible) and approximate location within a code block (first half or second half). This reduces the complexity of the PCC and still allows error pointers so as to optimize the effectiveness of the ECC decoder. The method also summarizes the distribution of errors on the tape into a concise format that can be handled easily by the microcode Error Recovery Procedures (ERP).