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FUJITSU MAP3735FC User Manual

Page 38

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Data Format

3-2

C141-E163

Note

:

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.)

n = MAP3147FC: 47,925

MAP3735FC: 47,995

Zone

Cell

Cylinder

Cylinder –73

to

Cylinder –4

System space

Internal test space

Cylinder –85

to

Cylinder –78

SA0

SAS69

Internal test cylinder

~

~

~

~

~

~

~

~

Spare Sectors per Cell 0

0

0

1

13

User Space for Cell 0-0

Spare Sectors per Cell 1

14

1

15

0

27

User Space for Cell 1-0

m-13

P1

m

User Space for Cell P1-0

Spare Sectors per Cell P1

Alternate Cylinder

User Space for Cell xx-1

User Space for Cell yy-17

User Space

(Primary Cylinder
0 - (n-1))

(1)

1

17

n

:

Figure 3.1

Cylinder configuration

Apart from the above logical configuration, the IDD intends to increase the storage capacity by
dividing all cylinders into several zones and changing a recording density of each zone. Tables 3.1 to
3.3 show the zone layout and the track capacity.

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