Patent ID: 9147430
Filing Date: 2015-09-29
Classification: G11B

Abstract:
1. A hard-disk drive for reading user data from a track of a hard disk, the track comprising a full overhead section followed by a plurality of user sections interleaved with a plurality of intervening partial overhead sections, wherein: the full overhead section is long enough to enable the drive to attain sufficient timing lock based on only the full overhead section to accurately read user data stored in the immediately following user section; each partial overhead section is too short to enable the drive to attain the sufficient timing lock based on only one partial overhead section to accurately read the user data stored in the immediately following user section; and the partial overhead sections are long enough to enable the drive to attain the sufficient timing lock based on a set of two or more consecutive partial overhead sections to accurately read the user data stored in the user section immediately following the last partial overhead section in the set.