Method of and apparatus for preventing generating of off-tracking in hard disc drive

An apparatus for preventing off tracking from occurring when a hard disc drive drives a hard disc having at least one track formed of servo sectors on which servo signals are recorded, the apparatus comprising:

• a width checking unit checking whether a width of the at least one track is even using burst regions A, B, C, and D written on each servo sector, to output a checking result;
• and
• a controller controlling the width checking unit and preventing occurrence of the off tracking in response to the checking result.

An apparatus for preventing off tracking from occurring when a hard disc drive drives a hard disc having at least one track formed of a servo sector having a plurality of burst regions on which servo signals are recorded, the apparatus comprising:

• a width checking unit receiving signals from the burst regions of the servo sector of the at least one track to check whether a width of the at least one track is even using the signals of the burst regions of the servo sector and output a checking result indicating whether the width of the at least one track is even;
• and
• a controller erasing the servo signals from the burst regions of the servo sector of the at least one track and write the servo signals on the erased burst regions of the servo sector of the at lest one track in response to the checking result to prevent occurrence of the off tracking.

An apparatus for preventing off tracking from occurring when a hard disc drive drives a hard disc having at least one track formed of a servo sector having a plurality of burst regions, the apparatus comprising:

• a width checking unit reading signals from the burst regions of the servo sector of the at least one track to output a checking result indicating a width of the at least one track;
• and
• a controller controlling writing servo signals on the burst regions of the servo sector of the at least one track in response to the checking result to prevent occurrence of the off tracking.

A method of preventing off tracking from occurring when a hard disc drive drives a hard disc having at least one track formed of a servo sector having a plurality of burst regions, the method comprising:

• reading signals from the burst regions of the servo sector of the at least one track to output a checking result indicating a width of the at least one track;
• and
• writing servo signals on the burst regions of the servo sector of the at least one track in response to the checking result to prevent occurrence of the off tracking.