Patent ID: 7110200
Filing Date: 2006-09-19
Classification: G11B

Abstract:
1. A magnetic disk control apparatus for recording data for each sector on a magnetic disk in such a manner that when a servo field is present in a sector including a synchronization field and a data field, said sector is split into a first split sector and a second split sector each including a synchronization field and a data field, said apparatus comprising: a first synchronization field forming section that forms said synchronization field in said first split sector; and a second synchronization field forming section that forms said synchronization field shorter than that of said first split sector in said second split sector, wherein said first synchronization field forming section forms a phase synchronization field capable of phase synchronization and a phase frequency synchronization field capable of phase frequency synchronization as said synchronization field, and said second synchronization field forming section forms a phase synchronization field capable of phase synchronization as said synchronization field; said apparatus further comprising: a phase frequency information storage section that reads and stores, when data recorded on the magnetic disk is read, phase frequency information from the phase frequency synchronization field formed by said first synchronization field forming section so as to use the phase frequency information as phase frequency synchronization information for reading data from said second split sector.