Data Format
System space
User Space
Spare
Cylinder
Physics Cylinder
-Z
-4
Cylinder0
1
m-1
Cylinder1
m-1
Cylinder0
1
m-1
m-1
0
1
9
lternate Cell
Spare sectors for each cell
Head0
Head1
Head
(a-1)
Cell0
Cell
n-1
Change
for cell
(10)
Last Cylinder
Spare sectors for each cell
Zone0
Zone1
Zone
(X-1)
Note: Spare sectors on the last track in each cell are not necessarily placed at the end of the track
because of a track skew or a cylinder skew. (Details are explained in Subsection 3.1.3.)
Figure 3.1 Cylinder configuration
Apart from the above logical configuration, the HDDs intend to increase the storage capacity by
dividing all cylinders into several zones and changing a recording density of each zone.
28 C141-E266
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