Seagate 7200.11 Formatted capacity, Default logical geometry, Recording and interface technology

2.1Formatted capacity

Model	Formatted	Guaranteed	Bytes per sector
	capacity*	sectors
ST31000333AS	1000 Gbytes	1,953,525,168	512
ST3640323AS	640 Gbytes	1,250,284,896	512
ST3320613AS	320 Gbytes	625,142,448	512
ST3320813AS
ST3160813AS	160 Gbytes	312,581,808	512

*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.

2.3Recording and interface technology

	ST31000333AS	ST3640323AS	ST3320613AS	ST3160813AS
			ST3320813AS
Interface	Serial ATA (SATA)
Recording method	Perpendicular
Recording density (kbits/inch max)	1300	1250
Track density (ktracks/inch avg)	182
Areal density (Gbits/inch2 avg)	228	219
Spindle speed (RPM)	7,200 ± 0.2%
Internal data transfer rate (Mbits/sec max)	1520	1460
Sustained data transfer rate (Mbytes/sec max)	120	115
I/O data-transfer rate (Mbytes/sec max)	300

8 Barracuda 7200.11 Serial ATA Product Manual, Rev. B