Seagate ST31500341AS Barracuda 7200.11 SATA Product Manual - Page 12
Table 2, for 640 Gbyte models - specifications
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Table 2: Drive specifications summary for 640 Gbyte models Drive specification Formatted capacity (512 bytes/sector)* Guaranteed sectors Heads Discs Bytes per sector Default sectors per track Default read/write heads Default cylinders Recording density Track density Areal density Spindle speed Internal data transfer rate Sustained data transfer rate OD I/O data-transfer rate ATA data-transfer modes supported Cache buffer Height (max) Width (max) Length (max) Weight (typical) Average latency Power-on to ready Standby to ready Track-to-track seek time Average seek, read Average seek, write Startup current (typical) 12V (peak) Voltage tolerance (including noise) Ambient temperature Temperature gradient Relative humidity Relative humidity gradient Wet bulb temperature Altitude, operating Altitude, nonoperating (below mean sea level, max) Operational Shock Non-Operational Shock ST3640323AS 640 Gbytes 1,250,263,728 4 2 512 63 16 16,383 1250 kbits/in max 190 ktracks/in avg 219 Gbits/in2 avg 7,200 RPM 1460 Mbits/sec max 115 Mbytes/sec max 300 Mbytes/sec max PIO modes 0-4 Multiword DMA modes 0-2 Ultra DMA modes 0-6 32 Mbytes 26.1 mm (1.028 inches) 101.6 mm (4.000 inches) +/- 0.010 inches 146.99 mm (5.787 inches) 543 grams (1.199 lb.) 4.16 msec 20 sec max 14 sec max