Seagate ST9320312AS ユーザーズマニュアル

6

Momentus Product Manual, Rev. D

 

Formatted GB*

320

250

160

guaranteed logical blocks

625,142,448

488,397,168

312,581,808

bytes per physical sector

4096

512

512

512

Physical read/write heads

2

1

Discs

1

Cache (MB)

8

Recording density in BPI (bits/in avg)

1560k

Track density TPI (tracks/in avg)

325k

Areal density (Gb/in

2 

avg)

507

Spindle speed (RPM)

5400

Average latency (ms)

5.2

Internal transfer rate (Mb/s max)

1175

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

300

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

9.5 +/- 0.2 mm (0.374 +/-.008in)

Width

69.85 mm +/- 0.25 mm (2.75 +/- 0.010in)

Length

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

Weight

<100 g (0.220 lb)

Power-on to ready (sec typical)

3.6

Power-on to ready (sec max)

4.5

Standby to ready (sec typical)

2.5

Standby to ready (sec max)

3.5

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

1.5

Average seek, read (ms typical)

13.0

Full-stroke seek, read (ms max)

27.0

Startup current, +5V (max)

1.0A

Seek power (typical)

1.3W

Read/write power (typical)

Read: 1.25W; Write: 1.65W

Idle mode, low power (typical)

0.47W

Standby mode

0.12W (typical)***

Sleep mode

0.12W (typical)***

Voltage tolerance (including noise)

+5V ± 5%

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 3048 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)

Shock, operating (Gs max at 2ms)

350