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6 Barracuda LP Series SATA Product Manual, Rev. A
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
ST32000542AS 2000 Gbytes 3,907,029,168
512ST31500541AS 1500 Gbytes 2,930,277,168
ST31000520AS 1000 Gbytes 1,953,525,168
Cylinders Read/write heads Sectors per track
16,383 16 63
Interface Serial ATA (SATA)
Recording method Perpendicular
Recording density (kbits/inch max) 1417 kbits/in max
Track density (ktracks/inch avg) 236 ktracks/in avg
Areal density (Gbits/inch
2
avg) 341.5 Gbits/in
2
avg
Spindle speed (RPM) 5,900 +/- 0.2%
Internal data transfer rate (Mbits/sec max) 1285 Mbits/sec max
Sustained data transfer rate (Mbytes/sec max) 95 Mbytes/sec max
I/O data-transfer rate (Mbytes/sec max) 300 (Mbytes/sec max)