Title :
Investigation of disk damage caused during load/unload using a surface reflectance analyzer
Author :
Yonemura, Shinji ; Weissner, Stefan ; Lin Zhou ; Talke, Frank
Author_Institution :
Data Storage Div., Hitachi Ltd., Kanagawa, Japan
Abstract :
Wear of the carbon layer of a magnetic recording disk is investigated during load/unload using a surface reflectance analyzer (SRA). Wear is determined as a function of the number of the load/unload (L/UL) cycles, the disk rotational speed, and the air bearing design. Two types of subambient pressure sliders are used in the experiments, the difference being related to the size and position of the subambient pressure region. The load/unload behavior of the two slider types is determined numerically using finite element air bearing simulation.
Keywords :
disc drives; finite element analysis; hard discs; reflectivity; wear testing; L/UL cycles; air bearing design; disk damage; disk rotational speed; finite element simulation; load/unload process; magnetic recording disk; subambient pressure sliders; surface reflectance analyzer; wear; Auditory system; Disk recording; Finite element methods; Giant magnetoresistance; Hard disks; Magnetic analysis; Magnetic recording; Reflectivity; Rotation measurement; Testing;
Conference_Titel :
Magnetic Recording Conference, 2002. Digest of the Asia-Pacific
Conference_Location :
Singapore
Print_ISBN :
0-7803-7509-2
DOI :
10.1109/APMRC.2002.1037711
