Patent ID: 6084734
Filing Date: 2000-07-04
Classification: G11B

Abstract:
An apparatus for correcting read errors in a disk drive, said apparatus comprising:means for determining that an undesired distortion exists in a data signal read from a surface of a data storage disk;means for finding an approximate starting location of said distortion within said data signal, wherein said means for finding comprises:means for performing a first read operation in a first region of said data storage disk;means for performing a second read operation in said first region of said data storage disk; andmeans for comparing data read during said first read operation to data read during said second read operation to determine a location where said data read during said second read operation first begins to differ from said data read during said first read operation; andmeans for correcting errors in said data signal caused by said undesired distortion using said approximate starting location of said distortion.