MAGNETIC DISK DEVICE, MAGNETIC DISK CONTROLLING APPARATUS, AND HEAD POSITION DETERMINING METHOD

摘要

According to one embodiment, a magnetic disk device includes an initial calculation module and a simple determination module. The initial calculation module, in a simple determination expression describing a magnitude relation between a first value calculated from a first half part of the burst data and a second value calculated from a second half part of the burst data, starts a calculation of the first value before the reading of the second half part of the burst data is completed. The simple determination module performs a determination by the simple determination expression after the reading of the second half part of the burst data is completed.