Title :
Head positioning servo and data channel for HDDs with multiple spindle speeds
Author :
Yada, H. ; Ishioka, H. ; Yamakoshi, T. ; Onuki, Y. ; Shimano, Y. ; Uchida, M. ; Kanno, H. ; Hayashi, N.
Author_Institution :
Sony Corp., Tokyo, Japan
fDate :
9/1/2000 12:00:00 AM
Abstract :
For hard disk drives (HDDs) having multiple disk rotational speeds, a new data channel and head positioning servo system was developed. Head positioning performance at the low spin-speed was preserved by using a synchronous servo scheme with more servo areas than the conventional scheme. Using a common physical disk format, sufficient servo performance and the same data recording density of 1.3 Gbit/inch 2 were obtained on two 2.5 inch prototype HDDs with a low spin-speed of 37.5 Hz and a high spin-speed of 75 Hz. Disk interchangeability was also confirmed
Keywords :
disc drives; hard discs; magnetic heads; servomechanisms; 2.5 in; HDDs; data channel; data recording density; disk interchangeability; disk rotational speeds; hard disk drives; head positioning servo; multiple spindle speeds; physical disk format; synchronous servo scheme; Delay; Disk drives; Disk recording; Energy consumption; Frequency; Hard disks; Magnetic heads; Prototypes; Sampling methods; Servomechanisms;
Journal_Title :
Magnetics, IEEE Transactions on
