Fujitsu MBA3073NP Manual Do Utilizador

 

The size of the usable area for storing user data on the HDD (format capacity) varies according to 
the logical data block or the size of the spare sector area.  Table 3.1 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 tracks per cell – 

number of alternate spare sectors per cell] 

× [number of cells in the zone] 

 

[Formatted capacity] = [total of sectors of all zones] 

÷ [number of physical sectors in logical 

block] 

× [logical data block length] 

 

The following formula must be used when the number of logical data blocks is specified with the 
parameter in the MODE SELECT or MODE SELECT EXTENDED command. 

 

[Format capacity] = [logical data block length] 

× [number of logical data blocks] 

 

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. 

Model 

Data block length 

User blocks 

Format capacity 

MBA3300NC,
MBA3300NP 

585,937,500 

300 GB (*) 

MBA3147NC,
MBA3147NP 

287,277,984 

147 GB (*) 

512 

MBA3073NC,
MBA3073NP 

143,638,992 

73.5 GB (*) 

(*) One gigabyte (GB) = one billion bytes; accessible capacity will be less and 

actual capacity depends on the operating environment and formatting. 

 

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. 

 
3.2 

 

The HDD relates a logical data block address to each physical sector at formatting.  Data on the 
disk is accessed in logical data block units.  The initiator specifies the data to be accessed using 
the logical data block address of that data. 

 

 

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C141-E270