Seagate BARRACUDA ST31000528AS - Manual (Page 17)

Barracuda 7200.12 Serial ATA Product Manual, Rev. G 11
2.3 Recording and interface technology
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
2.4 Physical characteristics
Maximum height
1000 and 750GB models 26.1mm / 1.028 in
500, 320, 250 and 160GB models 19.98mm / 0.787 in
Maximum width 101.6mm / 4.000 (+ 0.010 in)
Maximum length 146.99mm / 5.787 in
Typical weight
1000 and 750GB models 622g / 1.371 lb
500, 320, 250 and 160GB models 415g / 0.915 lb
Cache buffer
1000 and 750GB models 32MB (32,768kb)
500 and 320GB models 16MB (16,384kb)
250 and 160GB models 8MB (8,192kb)