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Barracuda 7200.12 Serial ATA Product Manual, Rev. C 11
2.3 Recording and interface technology
2.4 Physical characteristics
Interface Serial ATA (SATA)
Recording method Perpendicular
Recording density (kbits/inch max) 1413
Track density (ktracks/inch avg) 236
Areal density (Gbits/inch
2
avg) 329
Spindle speed (RPM) 7,200 ± 0.2%
Internal data transfer rate (Mbits/sec max) 1695
Sustained data transfer rate (Mbytes/sec max) 125
I/O data-transfer rate (Mbytes/sec max) 300
Maximum height
1000 and 750 GB models 26.1 mm (1.028 inches)
500, 320, 250 and 160 GB models 19.98 mm (0.787 inches)
Maximum width 101.6 mm (4.000 +/- 0.010 inches)
Maximum length 146.99 mm (5.787 inches)
Typical weight
1000 and 750 GB models 622 grams (1.371 lb.)
500, 320, 250 and 160 GB models 415 grams (0.915 lbs)
Cache buffer
1000 and 750 GB models 32 Mbytes (32,768 kbytes)
500 and 320 GB models 16 Mbytes (16,384 kbytes)
250 and 160 GB models 8 Mbytes (8,192 kbytes)