Seagate ST3500820AS ユーザーズマニュアル

8

Barracuda 7200.11 Serial ATA Product Manual, Rev. G

Drive specification

ST3500320AS

ST3500620AS

ST3500820AS

Formatted capacity (512 bytes/sector)*

500 Gbytes

Guaranteed sectors

976,773,168

Heads

4

Discs

2

Bytes per sector

512

Default sectors per track

63

Default read/write heads

16

Default cylinders

16,383

Recording density

1090 kbits/in max

Track density

150 ktracks/in avg

Areal density

164 Gbits/in

2 

avg

Spindle speed

7,200 RPM

Internal data transfer rate

1287 Mbits/sec max

Sustained data transfer rate OD

105 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

32 Mbytes

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)

543 grams ( 1.199 lb.)

Average latency

4.16 msec

Power-on to ready

20 sec max

Standby to ready

14 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

<9.5 msec typical

Startup current (typical) 12V (peak)

3.0 amps

Voltage tolerance (including noise)

5V +10% / -7.5%

 

12V +10% / -7.5%

Ambient temperature

0° to 60°C per hour max (operating)

 

–40° to 70°C per hour max (nonoperating)

Temperature gradient

20°C per hour max (operating)

 

30°C per hour max (nonoperating)

Relative humidity

5% to 95% (operating)

 

5% to 95% (nonoperating)

Relative humidity gradient

30% per hour max

Wet bulb temperature

37.7°C max (operating)

 

40.0°C max (nonoperating)

Altitude, operating

–60.96 m to 3,048 m

 

(–200 ft. to 10,000+ ft.)

Altitude, nonoperating 

 

(below mean sea level, max)

–60.96 m to 12,192 m

 

(–200 ft. to 40,000+ ft.)

Operational Shock

63 Gs max at 2 msec

Non-Operational Shock

300 Gs max at 2 msec