Seagate ST3120811AS ユーザーズマニュアル

4

Barracuda 7200.9 Serial ATA Product Manual, Rev. C

Formatted Gbytes (512 bytes/sector)*

160

Heads

2

Discs

1

Guaranteed sectors

312,581,808

Bytes per sector

512

Default sectors per track

63

Default read/write heads

16

Default cylinders

16,383

Recording density, KBPI (kbits/in max)

756.09

Track density, KTPI (ktracks/in avg.)

141.95

Areal density, (Gbits/in

2 

avg)

103.8

Spindle speed (RPM)

7,200

Internal data transfer rate (Mbits/sec max)

867.2

Sustained data transfer rate OD (Mbytes/sec max)

80

I/O data-transfer rate (Mbytes/sec max)

300

ATA data-transfer modes supported

PIO modes 0–4

 

Multiword DMA modes 0–2

 

Ultra DMA modes 0–6

Cache buffer

8 Mbytes

2 Mbytes

Height (mm max)

19.99 mm (0.787 inches)

Width (mm max)

101.6 mm (4.000 inches) +/- 0.010 inches

Length (mm max)

146.99 mm (5.787 inches)

Weight (max)

380 grams (0.838 lb.)

Average latency (msec)

4.16

Power-on to ready (sec max)

<10.0 sec 

Standby to ready (sec max)

<10.0 sec

Track-to-track seek time (msec typical)

<0.8 (read),  <1.0 (write)

Average seek time (msec typical)

<12.9 (read, <13.9 (write)

Startup current (typical) 12V (peak)

2.8 amps

Voltage tolerance (including noise)

5V ± 5%

 

12V ± 10%

Ambient temperature

0° to 60°C (operating)

 

–40° to 70°C (nonoperating)

Temperature gradient (°C per hour max)

20°C (operating)

 

30°C (nonoperating)

Relative humidity

5% to 90% (operating)

 

5% to 95% (nonoperating)

Relative humidity gradient

30% per hour max

Wet bulb temperature (°C max)

37.7 (operating)

 

40.0 (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 (Gs max at 2 msec)

63

Non-Operational Shock (Gs max at 2 msec)

350 Gs

Vibration, operating

5–22 Hz: 0.25 Gs, Limited displacement

 

22–350 Hz: 0.5 Gs

 

350–500 Hz:: 0.25 Gs