Patent ID: 8861118
Filing Date: 2014-10-14
Classification: G11B

Abstract:
1. A method of operating a disk drive having tracks on a rotating disk that includes a plurality of angularly spaced servo identifier (SID) fields delineating sectors with each SID field including a servo address mark (SAM) field and at least one Integrated Servo sequence, the disk drive having a slider with a write head and a read head that is positionable over a track on the rotating disk, the method comprising: writing a first set of data bits in a first sector preceding a selected SID N on a selected track with the first set of data bits being positioned with a write-to-read gap between first set of bits of data and SID N, and then asserting a servo gate for a first selected time interval to enable the read head to detect the SAM field in SID N for time syncing; and writing a second set of data bits in a second sector positioned between the SID N and an SID N+1 with the second set of data bits being positioned without a write-to-read gap between the second set of data bits and SID N+1, where the second set of data bits contains a higher number of bits than the first set of data bits, then asserting the servo gate, for a second selected time interval that is shorter than the first selected time interval, after at least a portion of the SAM field in SID N+1 has passed under the read head, and then using at least one Integrated Servo sequence in SID N+1 for time syncing.