Write Frequency Change Circuit; Input/Output Waveforms Of Read Circuit - Fujitsu MAB3091FC Series Maintenance Manual

Figure 5.7

Input/output waveforms of read circuit

5.6.4

Write frequency change circuit

This disk drive uses the constant characteristics recording method for high density recording.
This recording method is different from the conventional recording method in which the write
frequency is fixed. With this new recording method, cylinders are grouped into several zones
depending on the drive type. The write frequency is changed so that the inner cylinder of each
zone has the same recording characteristics. The data area is split into 14 concentric circular
zones (MAA31xxFC and MAC30xxFC) and 12 concentric circular zones (MAB30xxFC).
Table 5.2 and 5.3 list the write frequency and recording density (bpi) of each zone.
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