Synthesizer Circuit; Transfer Rate Of Each Zone - Fujitsu MPG3XXXAH-E Product Manual

4.6.4

Synthesizer circuit

The drive uses constant density recording to increase total capacity. This is different from the
conventional method of recording data with a fixed data transfer rate at all data area. In the
constant density recording method, data area is divided into zones by radius and the data transfer
rate is set so that the recording density of the inner cylinder of each zone is nearly constant. The
drive divides data area into 15 zones to set the data transfer rate. Table 4.1 describes the data
transfer rate and recording density (BPI) of each zone.
MPG3307AH-E
Zone 0
Cylinder 0
to
2207
Transfer rate
49.73
[MB/s]
Zone 8
Cylinder 19360
to
22047
Transfer rate
37.22
[MB/s]
MPG3204AH-E / MPG3409AH-E
Zone 0
Cylinder 0
to
2783
Transfer rate
60.71
[MB/s]
Zone 8
Cylinder 19840
to
22175
Transfer rate
50.35
[MB/s]
The MPU transfers the data transfer rate setup data to the RDC that includes the time base
generator circuit to change the data transfer rate.
4 - 12
Table 4.1

Transfer rate of each zone

1 2 3
2208 4224 7232
to to to
4223 7231 9823
48.87 47.22 45.79
9 10 11
22048 23840 25248
to to to
23839 25247 26591
35.77 34.62 33.45
1 2 3
2784 5568 8352
to to to
5567 8351 11263
60.71 60.71 60.71
9 10 11
22176 23584 25088
to to to
23583 25087 26719
48.82 47.06 45.10
C141-E116-01EN
4 5 6
9824 13120 15616
to to to
13119 15615 17087
43.61 41.88 41.01
12 13 14
26592 28768 30176
to to to
28767 30175 30783
31.43 30.12 27.92
4 5 6
11264 13440 16096
to to to
13439 16095 17983
59.22 56.86 54.90
12 13 14
26720 28576 29952
to to to
28575 29951 30783
42.75 40.94 38.04
7
17088
to
19359
39.28
7
17984
to
19839
52.94