Fujitsu MPB3021AT, MPB3054AT Write clock frequency and transfer rate of each zone, Servo Control

Table 4.3 Write clock frequency and transfer rate of each zone

Zone	0	1	2	3	4	5	6	7
Cylinder	0	661	1198	1939	2673	3333	3959	4748
	to	to	to	to	to	to	to	to
	660	1197	1938	2672	3332	3958	4747	5216
Transfer rate	16.71	16.35	15.82	15.18	14.68	14.15	13.44	13.06
[MB/s]
Zone	8	9	10	11	12	13
Cylinder	5217	5887	6506	7074	8287	8719
	to	to	to	to	to	to
	5886	6505	7073	8286	8718	8982
Transfer rate	12.44	11.85	11.33	10.04	9.74	9.58
[MB/s]

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.

4.7Servo 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.

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