Seagate ST3250823NS, ST3250623NS manual Formatted capacity, Default logical geometry, LBA mode

2.2Formatted capacity*

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

*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting.

2.2.1LBA 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.

2.3Default logical geometry

Cylinders	Read/write heads	Sectors per track
16,383	16	63

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.

6 NL35 Series SATA Product Manual, Rev. B