公开(公告)号：US20150077876A1

公开(公告)日：2015-03-19

申请号：US14031989

申请日：2013-09-19

Applicant: HGST Netherlands B.V.

Inventor： Jonathan Darrel Coker ,  Richard Leo Galbraith ,  Weldon Mark Hanson ,  Travis Roger Oenning ,  Srinivasan Surendran

IPC: G11B20/12

CPC classification number: G11B20/1217 ,  G11B2020/1232

Abstract: A hard disk drive has disks with data sector preambles that allow for inter-track interference. The same data sector preamble is used for all data sectors in a track but the preamble in each track is different from the preamble in radially adjacent tracks. In a first embodiment each preamble includes a synchronization field (SF) and synchronization mark (SM) that are the same in each track but different from the SF and SM in radially adjacent tracks. Only two unique SFs and two unique SMs are required, with the two SFs and two SMs alternating in radially adjacent tracks. In a second embodiment the preambles are “integrated”, meaning that the preamble is a sequence of bits that does not include separate dedicated fields, like SF and SM. The preamble bit sequences are decoded using matched filters to provide bit synchronization and start-of-data information.

Abstract translation: 硬盘驱动器具有带数据扇区前导码的磁盘，允许进行轨道间干扰。 对于轨道中的所有数据扇区使用相同的数据扇区前同步码，但是每个轨道中的前导码与径向相邻轨道中的前同步码不同。 在第一实施例中，每个前导码包括在每个轨道中相同但与径向相邻轨道中的SF和SM不同的同步场（SF）和同步标记（SM）。 只需要两个独特的SF和两个独特的SM，两个SF和两个SM在径向相邻的轨道中交替。 在第二实施例中，前导码是“集成的”，这意味着前同步码是不包括单独的专用字段（如SF和SM）的比特序列。 使用匹配滤波器解码前导码比特序列，以提供比特同步和数据开始信息。