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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