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10 Barracuda 7200.11 Serial ATA Product Manual, Rev. G
2.1 Formatted capacity
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
2.1.1 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.
2.2 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.
2.3 Recording and interface technology
Model
Formatted
capacity*
Guaranteed
sectors
Bytes per sector
ST31000340AS
ST31000640AS
1000 Gbytes 1,953,525,168 512
ST3750330AS
ST3750630AS
750 Gbytes 1,465,149,168 512
ST3640330AS
ST3640630AS
640 Gbytes 1,250,284,896 512
ST3500320AS
ST3500620AS
ST3500820AS
500 Gbytes 976,773,168 512
Cylinders Read/write heads Sectors per track
16,383 16 63
Interface Serial ATA (SATA)
Recording method Perpendicular
Recording density (kbits/inch max) 1090
Track density (ktracks/inch avg) 150
Areal density (Gbits/inch
2
avg) 164
Spindle speed (RPM) 7,200 ± 0.2%
Internal data transfer rate (Mbits/sec max) 1287
Sustained data transfer rate (Mbytes/sec max) 105
I/O data-transfer rate (Mbytes/sec max) 300