Patent ID: 6191904
Filing Date: 2001-02-20
Classification: G11B

Abstract:
A method for reading data from a magnetic disk, the method comprising:inserting the magnetic disk into a disk drive, the magnetic disk including a cylinder having a plurality of servo bursts, a plurality of data sectors, and a zone data table, the plurality of servo bursts including a first servo burst, a second servo burst, and a third servo burst, the zone data table including at least a first nominal timing delay between the third servo burst and a first data sector;detecting the first servo burst, the second servo burst, and the third servo burst from the magnetic disk;determining a first time interval between detecting the first servo burst and detecting the second servo burst;determining a second time interval between detecting the second servo burst and detecting the third servo burst;determining a first time interval deviation in response to the first time interval;determining a second time interval deviation in response to the second time interval;predicting a third time interval deviation in response to the first time interval deviation and in response to the second time interval deviation;determining a modified timing delay between the third servo burst and the first data sector in response to the predicted third time interval deviation; andwaiting the modified timing delay after detecting the third servo burst before detecting the first data sector.