Seagate ST3320620AS, ST3120215AS, ST3120815AS Drive specifications summary for 750 Gbyte models

Table 1:	Drive specifications summary for 750 Gbyte models
Drive specification		ST3750640AS	ST3750840AS
Formatted capacitty (512 bytes/sector)*		750 Gbytes
Guaranteed sectors		1,465,149,168
Heads		8
Discs		4
Bytes per sector		512
Default sectors per track		63
Default read/write heads		16
Default cylinders		16,383
Recording density		769 kbits/in avg
Track density		141 ktracks/in avg
Areal density		109 Gbits/in2 avg
Spindle speed		7,200 RPM
Internal data transfer rate		1,030 Mbits/sec max
Sustained data transfer rate OD (read)		78 Mbytes/sec max
I/O data-transfer rate		300 Mbytes/sec max
ATA data-transfer modes supported		PIO modes 0–4
		Multiword DMA modes 0–2
		Ultra DMA modes 0–6
Cache buffer		16 Mbytes	8 Mbytes
Height (max)		26.1 mm (1.028 inches)
Width (max)		101.85 mm (4.010 inches)
Length (max)		146.99 mm (5.787 inches)
Weight (typical)		720 grams (1.59 lbs)
Average latency		4.16 msec
Power-on to ready		15 sec max
Standby to ready		15 sec max
Track-to-track seek time		<0.8 msec typical read; <1.0 msec typical write
Average seek, read		<8.5 msec typical
Average seek, write		<10.0 msec typical
Startup current (typical) 12V (peak)		2.8 amps
Voltage tolerance (including noise)		5V ± 5%
		12V ± 10%
Ambient temperature		0° to 60°C (operating)
		–40° to 70°C (nonoperating)
Temperature gradient		20°C per hour max (operating)
		30°C per hour max (nonoperating)
Relative humidity		5% to 90% (operating)
		5% to 95% (nonoperating)
Relative humidity gradient		30% per hour max
Wet bulb temperature		37.7°C max (operating)
		37.7°C max (nonoperating)
Altitude, operating		–60.96 m to 3,048 m
		(–200 ft. to 10,000+ ft.)
Altitude, nonoperating		–60.96 m to 12,192 m
(below mean sea level, max)		(–200 ft. to 40,000+ ft.)
Operational Shock		68 Gs at 2 msec max
Non-Operational Shock		300 Gs at 2 msec max

4 Barracuda 7200.10 Serial ATA Product Manual, Rev. K