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3-2 C141-E234
N
ote: Spare sectors on the last track in each cylinder 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.)
Zone Cell Cylinder
Cylinder –143
to
Cylinder –4
System space
Internal test space
Cylinder –154
to
Cylinder –147
•
SA0
SA139
Internal test cylinder
~ ~
~ ~
~ ~
~ ~
Spare Sectors per Cell 0-0
0
0 1
•
26
User Space for Cell 0-0
27
1 28
•
0 53
•
User Space for Cell 1-0
m-26
P1
•
m
User Space for Cell P1-0
Spare Sectors per Cell P1-0
Alternate Cylinde
r
User Space for Cell xx-1
User Space for Cell y
y
-17
User Space
(Primary Cylinder
0 - (n-1))
(1)
1
17 n
:
Spare Sectors per Cell 1-0
Figure 3.1 Cylinder configuration
Apart from the above logical configuration, the HDD intends to increase the storage capacity by
dividing all cylinders into several zones and changing a recording density of each zone.