Patent ID: 7848041
Filing Date: 2010-12-07
Classification: G11B

Abstract:
1. A disk drive comprising: a disk having a data-recording area for recording a data set which comprises a preset number of bits and which contains user data to which error-correcting codes have been added; a data-reproducing unit having a head and configured to record the data set in the data-recording area and to reproduce the data set from the data-recording area; an error-determining unit configured to determine, by using the error-correcting codes, an error showing a change in the total number of bits in a data-bit string of the data set reproduced by the data-reproducing unit; and an error-correcting unit configured to detect data bits lost in the data set or excessive data bits added to the data set and to correct an error in the data-bit string in accordance with the data bits detected.