Seagate ST31000340NS Manuale Utente

6

Barracuda ES.2 Serial ATA Product Manual, Rev. A

Formatted Gbytes (512 bytes/sector)*

500

250

Guaranteed sectors

976,773,168

488,397,168

Heads

4

2

Discs

2

1

Bytes per sector

512

Default sectors per track

63

Default read/write heads

16

Default cylinders

16,383

Recording density, KBPI (kbits/in max)

1,090

Track density, KTPI (ktracks/in avg.)

150

Areal density, (Gbits/in

2 

avg)

164

Spindle speed (RPM)

7,200

Internal data transfer rate (Mbits/sec max)

1287

Sustained data transfer rate OD (Mbytes/sec max)

105

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

32 Mbytes

Height (mm max)

26.1 mm (1.028 inches)

Width (mm max)

101.6 mm (4.000 inches) +/- 0.010 inches

Length (mm max)

146.99 mm (5.787 inches)

Weight (max)

530 grams (1.168 lbs)

495 grams (1.091 lbs)

Average latency

4.16 msec

Power-on to ready (sec max)

20 sec 

Standby to ready (sec max)

8 sec

Track-to-track seek time (msec typical)

0.8 read; 1.0 write

Average seek, read (msec typical)

8.5

Average seek, write (msec typical)

9.5

Startup current (typical) 12V (peak)

2.8 amps

Voltage tolerance (including noise)

  5V + 10% / -7.5%

 

12V  + 10% / -7.5%

Ambient temperature

5° to 55°C (operating)

 

–40° to 70°C (nonoperating)

Temperature gradient (°C per hour max)

20°C (operating)

 

30°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)

 

40.0 (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 (max at 2 msec)

70 Gs

Non-Operational Shock (max at 2 msec)

300 Gs