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Barracuda XT Series SATA Product Manual, Rev. C 5
2.1 Formatted capacity
Model
Formatted
capacity*
Guaranteed
sectors
Bytes per sector
ST32000641AS 2000GB 3,907,029,168 512
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and
formatting.
2.1.1 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 address-
ing support of drives with capacities over 137GB.
2.2 Default 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.
2.3 Recording and interface technology
Interface Serial ATA (SATA)
Recording method Perpendicular
Recording density (kbits/inch max) 1421kb/in
Track density (ktracks/inch avg) 240 ktracks/in
Areal density (Gbits/inch
2
avg) 347Gb/in
2
Spindle speed (RPM) 7200 + 0.2%
Internal data transfer rate (Mb/s max) 1300Mb/s
Sustained data transfer rate (MB/s max) 138MB/s
I/O data-transfer rate (MB/s max) 600MB/s