公开(公告)号：US09123386B2

公开(公告)日：2015-09-01

申请号：US13666118

申请日：2012-11-01

Applicant: Agency for Science, Technology and Research

Inventor： Zhimin Yuan ,  Bo Liu ,  Shengbin Hu ,  Chun Lian Ong

IPC: G11B5/60 ,  G11B27/36

CPC classification number: G11B27/36 ,  G11B5/6011 ,  G11B5/6029 ,  G11B5/607

Abstract: A method for measuring a change in a spacing between a head and a storage medium of a data storage system. The method includes obtaining a first readback signal from the storage medium using the head at a first spacing between the head and the storage medium, determining a first power spectrum density over a frequency range from the obtained first readback signal, obtaining a second readback signal from the storage medium using the head at a second spacing between the head and the storage medium, determining a second power spectrum density over the frequency range from the obtained second readback signal, and providing a measurement indicative of the change in the spacing based on the determined first power spectrum density and the determined second power spectrum density. A data storage system is also provided.

Abstract translation: 一种用于测量数据存储系统的头部和存储介质之间的间隔的变化的方法。 该方法包括使用头部以头部和存储介质之间的第一间隔从存储介质获得第一回读信号，从获得的第一回读信号确定频率范围上的第一功率谱密度，从第 所述存储介质以所述头部和所述存储介质之间的第二间隔使用所述头部，从所获得的第二回读信号确定所述频率范围上的第二功率谱密度，并且基于所确定的所述第二回读信号提供指示所述间隔的变化的测量值 第一功率谱密度和确定的第二功率谱密度。 还提供了数据存储系统。