DocumentCode
538393
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
fYear
2010
fDate
10-12 Nov. 2010
Firstpage
1
Lastpage
2
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;
fLanguage
English
Publisher
ieee
Conference_Titel
APMRC, 2010 Digest
Conference_Location
Singapore
Print_ISBN
978-1-4244-8103-3
Type
conf
Filename
5682354
Link To Document