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Theory of Device Operation
4-18 C141-E145-02EN
Figure 4.8 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)
ÕÖ
Diameter
direction
Ø
Ø
Circumference
Direction
Erase: DC erase
area
OGB
Data area
IGB
expand
Servo frame
(120 servo frames per revolution)