Mechanically-induced readback errors in contact recording

Abstract

True contact recording, where the slider interacts substantially with the disk, produces read errors in the form of shifted bits. The errors arise from velocity jitter at suspension resonance frequencies, excited by the slideddisk contact, and degrade readback performance long before the onset of tribological wear. Performance degradation is particularly apparent in high altitudehow pressure situations, which increase the amount of slider/disk interaction. Channel optimization should be revisited for low flying components.

Burnishing Heads In-Drive for Higher Density Recording

“…Such tightly packed fine surface features on the abrading body are also likely responsible for the fine polish of the head surface after burnishing (Fig. 3) [5].…”

“…But the slider design precluded any air-bearing function and was designed to minimize wear rates, which properties are directly contrary to the system proposed here. A true contact recording system like Censtor's is difficult to realize because of velocity jitter induced by the contact [5].…”

A dual stage slider–suspension design for nanospaced recording

“…Detailed theoretical and experimental investigations into the dynamics behavior of a contact slider can be seen in the published literatures. [6][7][8] Therefore, how to control slider bouncing is of crucial significance in the design of a reliable contact interface. The approximate effect of the major mechanical design parameters on the bouncing performance is plotted in Fig.…”