Servo Frame Format; 96 Servo Frames In Each Track - Fujitsu MPG3XXXAH-E Product Manual

4.7.3

Servo frame format

As the servo information, the drive uses the two-phase servo generated from the gray code and Pos
A to D. This servo information is used for positioning operation of radius direction and position
detection of circumstance direction.
The servo frame consists of 5 blocks; write/read recovery, servo mark, gray code, Pos A to D and
PAD. Figure 4.6 shows the servo frame format.
0.16 s
0.72 s
ASM
R/W Recovery Field
6.63 s
Servo
Frame
0.17 s
1.81 s 0.53 s 0.74 s
Pos
SCD
PA
A
SSM
DATA
86.81 s
Figure 4.6

96 servo frames in each track

C141-E116-01EN
0.56 s 0.56 s
0.56 s
Pos Pos
Pos
B D
C
Servo
DATA
Frame
0.80 s
PAD
4 - 17