Fujitsu MPC3096AT Product Manual - Page 56

Time base generator circuit, Table 4.2, Write clock frequency and transfer rate of each zone

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4.6.4 Time base generator 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 4.2 describes the data transfer rate and recording density (BPI) of each zone. Table 4.2 Write clock frequency and transfer rate of each zone MPC3032AT/MPC3043AT/MPC3064AT/MPC3084AT/MPC3096AT Zone 0 1 2 3 4 5 6 7 Cylinder 0 981 1961 2961 3896 4641 5371 5911 to to to to to to to to 980 1960 2960 3895 4640 5370 5910 6455 Transfer rate [MB/s] 19.83 19.83 19.83 19.06 18.43 17.79 16.80 16.80 Zone Cylinder Transfer rate [MB/s] 8 6456 to 6895 9 6896 to 7695 10 7696 to 8465 11 8466 to 9105 12 9106 to 9720 13 14 9721 10691 to to 10690 11115 16.40 15.63 14.87 14.23 13.60 12.58 11.44 MPC3102AT Zone Cylinder Transfer rate [MB/s] 0 0 to 925 19.83 1 926 to 1850 19.83 2 1851 to 2775 19.83 3 2776 to 3700 19.83 4 3701 to 4620 19.83 5 4621 to 5440 19.06 6 5441 to 6090 18.43 7 6091 to 6740 17.79 Zone Cylinder Transfer rate [MB/s] 8 6741 to 7705 9 7706 to 8090 10 8091 to 8810 11 8811 to 9500 12 13 14 9501 10081 10641 to to to 10080 10640 11115 16.80 16.40 15.63 14.87 14.23 13.60 12.58 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. C141-E055-03EN 4 - 13

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C141-E055-03EN
4 - 13
4.6.4
Time base generator 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 4.2
describes the data transfer rate and recording density (BPI) of each zone.
Table 4.2
Write clock frequency and transfer rate of each zone
MPC3032AT/MPC3043AT/MPC3064AT/MPC3084AT/MPC3096AT
Zone
0
1
2
3
4
5
6
7
Cylinder
0
to
980
981
to
1960
1961
to
2960
2961
to
3895
3896
to
4640
4641
to
5370
5371
to
5910
5911
to
6455
Transfer rate
[MB/s]
19.83
19.83
19.83
19.06
18.43
17.79
16.80
16.80
Zone
8
9
10
11
12
13
14
Cylinder
6456
to
6895
6896
to
7695
7696
to
8465
8466
to
9105
9106
to
9720
9721
to
10690
10691
to
11115
Transfer rate
[MB/s]
16.40
15.63
14.87
14.23
13.60
12.58
11.44
MPC3102AT
Zone
0
1
2
3
4
5
6
7
Cylinder
0
to
925
926
to
1850
1851
to
2775
2776
to
3700
3701
to
4620
4621
to
5440
5441
to
6090
6091
to
6740
Transfer rate
[MB/s]
19.83
19.83
19.83
19.83
19.83
19.06
18.43
17.79
Zone
8
9
10
11
12
13
14
Cylinder
6741
to
7705
7706
to
8090
8091
to
8810
8811
to
9500
9501
to
10080
10081
to
10640
10641
to
11115
Transfer rate
[MB/s]
16.80
16.40
15.63
14.87
14.23
13.60
12.58
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.