METHOD FOR SWITCHING HEAD USING TRACK NUMBER MAPPING

摘要

PURPOSE: A method for switching a head using the track number mapping is provided to prevent the performance deterioration of an HDD(Hard Disk Drive) even if the HDD is made by assembling the disc written in an offline STW(Servo Track Write) method. CONSTITUTION: A deviation between a reference head and other head is calculated. A mapping table having the deviation between the reference head and the other head is written/stored in a memory(S604). If a head switching operation occurs, the corresponding head is switched to a track requesting access by applying the deviation of the corresponding head to an address of the track requesting the access(S610). The deviation is obtained by referring to the mapping table stored in the memory.