Seagate ST3400820ACE ユーザーズマニュアル

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DB35.3 Series PATA Product Manual, Rev. C
Table 1: 
Drive specifications summary for 750, 500, and 400 Gbyte models
Drive specification
ST3750840ACE
ST3500830ACE
ST3400820ACE
Formatted Gbytes (512 bytes/sector)*
750
500
400
Guaranteed sectors
1,465,149,168
976,773,168
781,422,768
Bytes per sector
512
Default sectors per track
63
Default read/write heads
16
Default cylinders
16,383
Recording density, max
926 kbits/in
813 kbits/in
781 kbits/in
Track density,  max
145 ktracks/in
Areal density, max
128.2 Gbits/in
2
114.4 Gbits/in
2
128.2 Gbits/in
2
Spindle speed
7,200 RPM
Internal data transfer rate, max
1,030 Mbits/sec 
Sustained data transfer rate, max
78 Mbytes/sec
72 Mbytes/sec
I/O data-transfer rate, max
100 Mbytes/sec
ATA data-transfer modes supported
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–5
Cache buffer
8 Mbytes
Height, max
26.1 mm (1.028 inches)
Width, max
101.6 mm (4.000 inches) +/- 0.010 inches
Length, max
146.99 mm (5.787 inches)
Weight, typical
720 grams
635 grams
Average latency
4.16 msec
Power-on to ready, max
16 sec 
Standby to ready, max
16 sec
Track-to-track seek time, typical
<0.8 msec read; <1.0 msec write
Average seek, read, typical
<11.0 msec
Average seek, write, typical
<12.0 msec
Startup current (max) 12V (peak)
2.0 amps
Voltage tolerance (including noise)
5V ± 5%
12V ± 10%
Ambient temperature
     operating
      nonoperating
0° to 60°C
–40° to 70°C
0° to 62°C
–40° to 70°C
Temperature gradient, per hour max
20°C (operating)
30°C (nonoperating)
Relative humidity
5% to 90% (operating)
5% to 95% (nonoperating)
Relative humidity gradient, per hour max
30%
Wet bulb temperature, max
37.7°C (operating)
37.7°C (nonoperating)
Altitude, operating
–60.96 m to 3,048 m
(–200 ft. to 10,000+ ft.)
Altitude, nonoperating, max
–60.96 m to 12,192 m below mean sea level
(–200 ft. to 40,000+ ft below mean sea level.)
Operational Shock, max
63 Gs at 2 msec
Non-Operational Shock, max
300 Gs at 2 msec
Vibration, operating
5–22 Hz: 0.25 Gs, Limited displacement
22–350 Hz: 0.50 Gs
350–500 Hz:: 0.25 Gs