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4.7 Servo Control
C141-E203-01EN 4-15
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 are
a
IGB
ex
p
and
Servo frame
(124 servo frames per revolution)