Seagate ST9402112A ユーザーズマニュアル

Momentus 4200.2 Product Manual, Rev. C

5

Formatted Gbytes (512 bytes/sector)*

60

50

40

30

Guaranteed sectors

117,210,240

97,692,174

78,140,160

58,605,120

Bytes per sector

512

Physical read/write heads

2

2

2

1

Discs

1

1

1

1

Cache (Mbytes)

8

Recording density, BPI (bits/inch typical)

778k

Track density. TPI (tracks/inch typical

126k

Areal density (Gbits/inch

2 

max)

98.2

Spindle speed (RPM)

4,200 RPM-class performance (actual spin speed: 5,400 RPM)

Internal data transfer rate OD (Mbytes/sec max)

37

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

100

ATA data-transfer modes supported

PIO modes 0–4; Multiword DMA modes 0–2; Ultra DMA modes 0–5

Height

9.5 +/–0.2 mm (0.374 +/–.008 inches)

Width

69.85 +/–0.25 mm (2.750 +/–0.010 inches)

Length

100.2 +/–0.25 mm (3.945 +/–0.010 inches)

Weight (typical)

100 grams (0.22 lb)

Average latency (msec)

5.6

Power-on to ready (sec typical)

3.5

Standby to ready (sec typical)

3.0

Startup current 5V (typical)

1.0 amps

Track-to-track seek time (msec typical)

1.0 (read), 1.5 (write)

Average seek time (msec typical)

12.5

Average seek, read (msec typical)

12.5

Average seek, write (msec typical)

14.5

Full-stroke seek (msec)

22 (typical); 24 (max)

Seek power (typical)

2.00 watts

Read/write power (typical)

Read: 1.80 watts; Write: 1.80 watts

Idle mode (low power, typical)

0.80 watts 

Standby mode

0.26 watts (typical)***

Sleep mode

0.26 watts (typical)***

Voltage tolerance (including noise)

5V ± 5%

Ambient temperature

5° to 55°C (operating)

 

–40° to 70°C (nonoperating)

Temperature gradient

 

(°C per hour max, noncondensing)

20°C (operating)

 

30°C (nonoperating)

Relative humidity

 

(noncondensing)

5% to 90% (operating)

 

5% to 95% (nonoperating)

Relative humidity gradient

30% per hour max

Wet bulb temperature (°C max)

30°C (operating)

 

40°C (nonoperating)

Altitude, operating

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

Altitude, nonoperating (below mean sea level, max)

–304.8 m to 12,192 m (–1,000 ft to 40,000 ft)

Shock, operating (Gs max at 2 msec)

250