Seagate ST3250623NS ユーザーズマニュアル

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NL35 Series SATA Product Manual, Rev. B
2.2
Formatted capacity*    
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary 
depending on operating environment and formatting.
2.2.1
LBA mode
When addressing these drives in LBA mode, all blocks (sectors) are consecutively numbered from 0 to n–1, 
where n is the number of guaranteed sectors as defined above.
See Section 4.3.1, "Identify Device command" (words 60-61 and 100-103) for additional information about 48-
bit addressing support of drives with capacities over 137 Gbytes.
2.3
Default logical geometry   
LBA mode
 
When addressing these drives in LBA mode, all blocks (sectors) are consecutively numbered from 0 to n–1, 
where n is the number of guaranteed sectors as defined above.
Model
Formatted capacity
Guaranteed sectors 
Bytes per sector
ST3400832NS and ST3400632NS
400 Gbytes
781,422,768
512
ST3250823NS and ST3250623NS
250 Gbytes
488,397,168
512
Cylinders
Read/write heads
Sectors per track
16,383
16
63