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Theory of Device Operation
4.7.2 Data-surface servo format
Figure 4.8 describes the physical layout of the servo frame. The three areas
indicated by (1) to (3) in Figure 4.8 are described below.
(1) Inner guard band
The head is in contact with the disk in this space when the spindle starts turning
or stops, and the rotational speed of the spindle can be controlled on this cylinder
area for head moving.
(2) Data area
This area is used as the user data area SA area.
(3) Outer guard band
This area is located at outer position of the user data area, and the rotational speed
of the spindle can be controlled on this cylinder area for head moving.
4-18
C141-E104-03EN
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