Title :
Servo format trend and servo channel improvement for high areal density
Author :
Guoxiao Guo ; Jie Yu
Author_Institution :
Western Digital Corp., Irvine, CA, USA
Abstract :
This paper reviews the hard disk drive servo format (wedge number, servo frequency, and efficiency) trends and some improvement approaches in the perpendicular magnetic recording system. We observe that due to decreasing system signal to noise ratio at high areal density, servo channel signal processing gain is needed to maintain and improve servo format efficiency. A gray code error correction scheme is presented.
Keywords :
disc drives; error correction codes; hard discs; magnetic recording; motion control; servomechanisms; signal processing; gray code error correction scheme; hard disk drive; high areal density; perpendicular magnetic recording system; servo channel improvement; servo channel signal processing gain; servo format trend; servo frequency; servo wedge number; Iron; Servomotors; Signal to noise ratio; Servo channel; error rate; format efficiency; signal to noise ratio;
Conference_Titel :
APMRC, 2010 Digest
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-8103-3
