Fujitsu MHT2020AT - Page 69

4.7 Servo Control
C141-E192-01EN 4-17
Figure 4.7 Physical sector servo configuration on disk surface
W/R Recovery
Servo Mark
Gray Code
W/R Recovery
Servo Mark
Gray Code
W/R Recovery
Servo Mark
Gray Code
Erase Servo A Erase Servo A
Servo B Erase Servo B Erase
Servo C Erase Servo C
Erase Servo D Erase
PAD
CYLn + 1
CYLn CYLn – 1 (n: even number)
!"
Diameter
direction
#
#
Circumference
Direction
Erase: DC erase
area
OGB
Data area
IGB
expand
Servo frame
(150 servo frames per revolution)