Apparatus and method for generating interleave erasure locations from thermal asperity erasure pointers

Abstract

Disclosed is a thermal asperity pointer processing apparatus and method for processing apparatus for generating erasure locations from a thermal asperity signal. The thermal asperity signal indicates an error burst in an interleaved data sector. The apparatus includes a thermal asperity pointer recorder, a storage unit, and a thermal asperity pointer processing unit. The thermal asperity pointer recorder is adapted to receive a thermal asperity signal and is configured to generate a thermal asperity event information associated with the thermal asperity signal. The thermal asperity event information includes a thermal asperity duration, a starting interleave number, and a starting interleave address of the thermal asperity signal in the interleaved data sector. The storage unit is configured to receive the thermal asperity event information from the thermal asperity pointer recorder and is configured to store the thermal asperity duration, starting interleave number, and starting interleave address associated with the thermal asperity signal. The thermal asperity pointer processing unit is coupled to receive the thermal asperity event information from the storage unit and is adapted to generate the erasure locations for interleaves corresponding to the error burst in the data sector.

Dependencies are inferred from the claim text.