FUJITSU DISK DRIVES MHM215OAT - Manual (Page 72)

4.7 Servo Control
C141-E104-02EN 4-19
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)
!"
Diameter
direction
#
#
Circumference
Direction
Erase: DC erase
area
OGB
Data area IGB
expand
Servo frame
(66 servo frames per revolution)