Agency for Science, Technology and Research

C/o Data Storage Institute

Shengbin Hu

Bo Liu

Zhimin Yuan

Chun Lian Ong

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.

Data storage system and a method for measuring a change in a spacing between a head and a storage medium of a data storage system

A method and apparatus of detecting variations in a clearance distance between a magnetic read/write transducer and a magnetic recording disk having a clearance detection burst recorded thereon. The clearance detection burst has at least two groups of bit patterns each having different transition densities. The method may have the steps of obtaining a readback signal from the at least two groups of bit patterns, the readback signal being sensitive to variations in the clearance; detecting the amplitude of the readback signal of a first group. The amplitudes of the readback signals are detected and then compared to provide an indication of a variation in the clearance.

Growing community of inventors

Singapore, Singapore

Shengbin Hu