Theory of Device Operation
4-16 C141-E218
Figure 4.7 Physical sector servo configuration on disk surface
O
GB
Data area
I
GB
expand
S
ervo frame
(172 servo frames per revolution)
CYLn + 1 CYLn
C
YLn
–
1 (n: even number)
W/R Recovery
Servo Mark
Gray Code
W/R Recovery
Servo Mark
Gray Code
W/R Recovery
Servo Mark
Gray Code
EVEN1
ODD
EVEN2
PAD
Diameter
direction
Circumference
Direction
Erase: DC erase
a
rea