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6 Barracuda 7200.10 Serial ATA Product Manual, Rev. B
2.2 Formatted capacity
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
2.2.1 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.
2.3 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.
2.4 Recording and interface technology
Model
Formatted
capacity*
Guaranteed
sectors
Bytes per sector
ST3250410AS,
ST3250310AS
250 Gbytes 488,397,168 512
Cylinders Read/write heads Sectors per track
16,383 16 63
Interface Serial ATA (SATA)
Recording method Perpendicular
Recording density (kbits/inch max) 1,049 (for nominal format)
Track density (ktracks/inch avg) 155 (for nominal format)
Areal density (Gbits/inch
2
avg) 163 (for nominal format)
Spindle speed (RPM) 7,200 ± 0.2%
Internal data transfer rate (Mbits/sec max) 1,212 (for nominal format)
Sustained data transfer rate (Mbytes/sec max) 106
I/O data-transfer rate (Mbytes/sec max) 300