Seagate ST3250820SCE ユーザーズマニュアル

4

DB35.3 Series Serial ATA Product Manual, Rev. D

Formatted Gbytes (512 bytes/sector)*

750

Guaranteed sectors

1,465,149,168

Bytes per sector

512

Default sectors per track

63

Default read/write heads

16

Default cylinders

16,383

Recording density, max

926 kbits/in

Track density, max

145 ktracks/in

Areal density, max

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

I/O data-transfer rate, max

300 Mbytes/sec

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

101.6 mm (4.000 inches) +/- 0.010 inches

Length, max

146.99 mm (5.787 inches)

Weight, typical

720 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

0° to 60°C (operating)

 

–40° to 70°C (nonoperating)

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