Seagate Barracuda 7200.12 ST3320418AS Product Manual page 14

Drive specifications summary
Table 3:
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
8
for 250 Gbyte models
ST3250318AS
250 Gbytes
488,397,168
1
1
512
63
16
16,383
1413 kbits/in max
236 ktracks/in avg
2
329 Gbits/in avg
7,200 RPM
1695 Mbits/sec max
125 Mbytes/sec max
300 Mbytes/sec max
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
8 Mbytes
19.98 mm (0.787 inches)
101.6 mm (4.000 inches) +/- 0.010 inches
146.99 mm (5.787 inches)
415 grams (0.915 lb.)
4.16 msec
<8.5 sec max
<8.5 sec max
<1.0 msec typical read;
<1.2 msec typical write
<8.5 msec typical
<9.5 msec typical
2.0 amps
5V +10% / -7.5%
12V +10% / -7.5%
0° to 60°C (operating)
–40° to 70°C (nonoperating)
20°C per hour max (operating)
30°C per hour max (nonoperating)
5% to 95% (operating)
5% to 95% (nonoperating)
30% per hour max
37.7°C max (operating)
40.0°C max (nonoperating)
–60.96 m to 3,048 m
(–1000 ft. to 10,000+ ft.)
–60.96 m to 12,192 m
(–1000 ft. to 40,000+ ft.)
70 Gs max at 2 msec
350 Gs max at 2 msec
Barracuda 7200.12 Serial ATA Product Manual, Rev. B
ST3160318AS
160 Gbytes
312,581,808