Seagate ST320LT007 - 9ZV142 ユーザーズマニュアル

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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 all models.

The specifications listed in this table are for quick reference. For details on specification measurement or definition, see the appropriate 
section of this manual

Formatted capacity (GB)*

320

250

160

Guaranteed logical blocks (LBA)

625,142,448

488,397,168

312,581,808

Bytes per physical sector

4096

Physical read/write heads

2

1

Disks

1

Cache (MB)

16

Recording density in BPI (bits/in avg)

1397k

Track density TPI (tracks/in avg)

315k

Areal density (Gb/in

2 

avg)

425

Spindle speed (RPM)

7200

Average latency (ms)

4.17

Internal transfer rate (Mb/s max)

1247

I/O data transfer rate (Gb/s max)

3.0

ATA data-transfer modes supported

SATA 1.0, Serial ATA Revision 2.6 
PIO modes 0–4 
Multiword DMA modes 0–2 
Ultra DMA modes 0–6

Height (max)

7.0 mm (0.276 in)

Width (max)

70.10 mm (2.76 in)

Length (max)

100.55 mm (3.959 in)

Weight (max)

<92.0 g (<0.203 lb)

Power-on to ready (sec typical)

3.5

Standby to ready (sec typical)

3.0

Track-to-track seek time, read (ms typical)

1.5

Average seek, read (ms typical)

11

Startup current, +5V (max)

1.0A

Read/write power (typical)

Read: 1.6W; Write: 1.9W

Idle mode, low power (typical)

0.66W

Standby/Sleep mode (typical)

0.15W ***

Voltage tolerance (including noise)

+5V ± 10%

Ambient temperature 

0° to 60°C (operating), –40° to 70°C (nonoperating)

Temperature gradient 
(°C per hour max)

20°C (operating) 
35°C (nonoperating)

Relative humidity

5% to 95% (operating) 
5% to 95% (nonoperating)

Relative humidity gradient

30% per hour max

Wet bulb temperature 
(°C max)

37.7 (operating) 
40 (nonoperating)

Altitude, operating

–304.8 m to 3,048 m (–1000 ft. to 10,000

+ 

ft.)

Altitude, nonoperating  
(meters below mean sea level, max)

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

+ 

ft.)