Format Capacity - Fujitsu MAB3045 Product Manual

3.1.5

Format capacity

The size of the usable area for storing user data on the IDD (format capacity) varies according
to the logical data block or the size of the spare sector area. Table 3.4 lists examples of the
format capacity when the typical logical data block length and the default spare area are used.
The following is the general formula to calculate the format capacity.
[Number of sectors of each zone] = [number of sectors per track
number of alternate spare sectors per cylinder]
[Formatted capacity] = [total of sectors of all zones] – [number of sectors per track in last zone
number of tracks (heads)
logical block]
The following formula must be used when the number of logical data blocks are specified with
the parameter in the MODE SELECT or MODE SELECT EXTENDED command.
[Format capacity] = [logical data block length]
The logical data block length, the maximum logical block address, and the number of the
logical data blocks can be read out by a READ CAPACITY, MODE SENSE, or MODE
SENSE EXTENDED command after initializing the disk medium.
Model
MAA3182xx
MAB3091xx
MAB3045xx
MAC3091xx
MAC3045xx
Note:
Total number of spare sectors is calculated by adding the number of spare sectors in each
primary cylinder and the number of sectors in the alternate cylinders.
3 - 10
number of alternate cylinders]
[logical data block length]
Table 3.4

Format capacity

Data heads Data block length
19
10
5 512
10
5
C141-E035-03EN
number of tracks (heads) –
[number of cylinders in the zone]
[number of physical sectors in
[number of logical data blocks]
User blocks Format capacity (GB)
35,680,750
17,824,700
8,895,370
17,871,600
8,918,420
18.2
9.1
4.55
9.1
4.55