Seagate ST3250318AS, ST31000528AS manual Formatted capacity, Default logical geometry, LBA mode

2.1Formatted capacity

Model	Formatted	Guaranteed	Bytes per sector
	capacity*	sectors
ST31000528AS	1000 Gbytes	1,953,525,168
ST3750528AS	750 Gbytes	1,465,149,168
ST3500418AS	500 Gbytes	976,773,168
ST3500410AS			512
ST3320418AS	320 Gbytes	625,142,448
ST3250318AS	250 Gbytes	488,397,168
ST3160318AS	160 Gbytes	312,581,808

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

2.1.1LBA 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.

2.2Default 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.

10 Barracuda 7200.12 Serial ATA Product Manual, Rev. B