Seagate ST320LT031 ユーザーズマニュアル

S

EAGATE 

L

APTOP 

U

LTRATHIN 

HDD SATA P

RODUCT 

M

ANUAL

, R

EV

. A

  4

 D

RIVE 

S

PECIFICATIONS 

Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal power. For convenience, the 
phrases the drive and this drive are used throughout this manual to indicate the following drive models:

The specification summaries listed in the following tables are for quick reference. For details on specification measurement or definition, 
refer to the appropriate section of this manual. 

Formatted capacity 

(1)

500 GB

320 GB

Guaranteed sectors

976,773,168

625,142,448

Heads

2

Disks

1

Bytes per sector

512 (logical) / 4096 (physical)

Recording density

1885 Kb/in

Track density

366 Ktracks/in avg

Areal density

690 Gb/in

2 

avg

Spindle speed

5400 RPM

Sustained data transfer rate OD

100 MB/s max

I/O data-transfer rate

600 MB/s max

ATA data-transfer modes supported

PIO modes 0–4 
Multiword DMA modes 0–2 
Ultra DMA modes 0–6

Cache buffer

16 MB

Height

5.0 ± 0.20 mm (0.197 ± 0.008 in)

Width

69.85 ± 0.25 mm (2.750 ± 0.010 in)

Length

100.35 +0.20 / -0.25 mm (3.951 +0.008 / -0.010 in)

Weight (typical)

<93g (0.205lb)

Average latency

5.6 ms

Startup current (typical) 5V (peak)

1.0 A

Voltage tolerance (including noise)

5V ± 5%

Operating temperature

0° to 60°C

Nonoperating temperature (Ambient)

–40° to 70°C

Temperature gradient (max)

20°C per hour max (operating) 
35°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 (max)

37.7°C max (operating) 
40.0°C max (nonoperating)

Altitude, operating

–304.8 m to 3048 m (–1000 ft to 10,000+ ft)

Altitude, nonoperating  
(below mean sea level, max)

–304.8 m to 12,192 m (–1000 ft to 40,000+ ft)

Operational Shock

400 Gs at 2 ms max

Non-Operational Shock

1000 Gs at 1 ms max