Seagate ST91000642NS Manuale Utente

Constellation.2 Serial ATA Product Manual, Rev. B

5

 

 

 

 

 

 

Formatted GB (512 bytes/sector)*

1000

500

250

Guaranteed sectors

1,953,525,168

976,773,168

488,397,168

Heads

8

4

2

Discs

4

2

1

Bytes per sector

512

Default sectors per track

63

Default read/write heads

16

Default cylinders

16,383

Recording density, KBPI (Kb/in max)

1544

Track density, KTPI (Ktracks/in avg.)

270

Areal density, (Gb/in

2 

avg)

417

Spindle speed (RPM)

7200

Internal data transfer rate (Mb/s max)

1304

Sustained data transfer rate OD (MB/s max)

115

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

600

ATA data-transfer modes supported

PIO modes 0–4

 

Multiword DMA modes 0–2

 

Ultra DMA modes 0–6

Cache buffer

64 Mbytes

Height (mm max)

14.8 mm (0.583 in)

Width (mm max)

70.0 mm (2.76 in)

Length (mm max)

100.5 mm (3.957 in)

Weight (max)

200 g (0.441 lb)

183 g (0.403 lb)

179 g (0.395 lb)

Average latency

4.16 ms

Power-on to ready (sec max)

20 sec 

Standby to ready (sec max)

13 sec

Track-to-track seek time (ms typical)

0.7 read;  0.85 write

Average seek, read (ms typical)

8.5

Average seek, write (ms typical)

9.5

Startup current (typical) 12V (peak)

2.0 amps

Voltage tolerance (including noise)

  5V +10 / -7.5%

 

12V +10 / -7.5%

Ambient temperature

5° to 60°C (operating)

 

–40° to 70°C (nonoperating)

Temperature gradient (°C per hour max)

20°C (operating)

 

20°C (nonoperating)

Relative humidity

5% to 95% (operating)

 

5% to 95% (nonoperating)

Relative humidity gradient

20% per hour max

Wet bulb temperature (°C max)

28°C

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 ms)

Read 70 Gs / Write 40 Gs

Non-Operational Shock (max at 2 ms)

400 Gs