7 servo control – FUJITSU MPA3043AT User Manual
Page 54
C141-E034-02EN
4 - 15
Table 4.3
Write clock frequency and transfer rate of each zone
Zone
0
1
2
3
4
5
6
7
Cylinder
0
to
622
623
to
1788
1789
to
2217
2218
to
2618
2619
to
3030
3031
to
3827
3828
to
4141
4142
to
4808
Transfer rate
[MB/s]
14.964
14.111
13.787
13.473
13.155
12.512
12.258
11.702
Zone
8
9
10
11
12
13
14
Cylinder
4809
to
5119
5120
to
6107
6108
to
6613
6614
to
7194
7195
to
7891
7892
to
8460
8461
to
8712
Transfer rate
[MB/s]
11.443
10.590
10.142
9.623
8.986
8.451
8.019
The MPU transfers the data transfer rate setup data (SDATA/SCLK) to the RDC that includes the
time base generator circuit to change the data transfer rate.
4.7
Servo Control
The actuator motor and the spindle motor are submitted to servo control. The actuator motor is
controlled for moving and positioning the head to the track containing the desired data. To turn
the disk at a constant velocity, the actuator motor is controlled according to the servo data that is
written on the data side beforehand.