The present invention may be embodied in a method for adjusting a servo sector
detection delay time between detection windows in a disk drive. The disk drive
includes a magnetic disk with a spiral track having contiguous storage segments.
Each storage segment has a servo sector and a predetermined number of uniformly-sized
data sectors. The storage segments are written at a relatively constant linear
density along the spiral track. In the method, the magnetic disk is rotated at
a constant angular velocity. A servo sector is detected. An adjustable delay time
is provided for opening a window to detect a next servo sector. The window is opened
after the adjustable delay time expires. A next servo sector is detected in the
window. A time between the servo sector detections is measured and the adjustable
delay time is adjusted based on the measured time.
