Fujitsu MPB3021AT Product Manual page 27

(1) Disk
The outer diameter of the disk is 95 mm. The inner diameter is 25 mm. The number of disks
used varies with the model, as described below. The disks are rated at over 40,000 start/stop
operations.
MPB3021AT: 1 disk
MPB3032AT: 2 disks
MPB3043AT: 2 disks
MPB3052AT: 3 disks
MPB3064AT: 3 disks
(2) Head
The heads are of the contact start/stop (CSS) type. The head touches the disk surface while the
disk is not rotating and automatically lifts when the disk starts.
Figure 2.2 illustrates the configuration of the disks and heads of each model. In the disk
surface, servo information necessary for controlling positioning and read/write and user data
are written. Numerals 0 to 5 indicate read/write heads.
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