Theory of Device Operation
CYLn + 1
W/R Recovery
Servo Mark
Gray Code
Erase
Servo A
Servo B
Erase
Servo C
Erase
Figure 4.8 Physical sector servo configuration on disk surface
4-18
IGB
Data area
expand
CYLn
CYLn – 1 (n: even number)
W/R Recovery
W/R Recovery
Servo Mark
Servo Mark
Gray Code
Gray Code
Erase
Servo B
Erase
Servo C
Servo D
Erase
PAD
Servo frame
(120 servo frames per revolution)
OGB
Servo A
Circumference
Erase
Direction
Erase: DC erase
Diameter
direction
area
C141-E145-02EN