Seagate ST9120821A ユーザーズマニュアル

4

Momentus 5400.2 PATA Product Manual, Rev. B

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)

2.0 watts

Read/write power (typical)

Read: 1.8 watts; Write: 1.8 watts

Idle mode (typical, low power)

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

Shock, nonoperating

 

(Gs max at 2 msec)

800

Shock, nonoperating

 

(Gs max at 1 msec)

900

Shock, nonoperating

 

(Gs max at 0.5 msec)

400

Vibration, operating

 

(max displacement may

 

apply below 10 hz)

1.0 Gs (0 to peak, 5–500 Hz)

Vibration, nonoperating

 

(max displacement may apply 
below 22 hz)

5.0 Gs (0 to peak, 10–500 Hz)

Drive acoustics, sound power 
(bels), 2 disc

Idle*

2.4 (typical)

 

2.6 (max)

Performance seek

2.9 (typical)

 

3.1 (max)

Nonrecoverable read errors

1 per 10

14

 bits read

Annualized Failure Rate (AFR)

0.73%

Load/Unload (U/UL) cycles

 

 

25°C, 50% relative humidity

 

 

32°C, 80% relative humidity 

 

5°C, 80% relative humidity 

 

5°C, 10% relative humidity 

 

55°C, 16% relative humidity 

 

 

600,000 software-controlled power on/off cycles

 

20,000 hard power on/off cycles

 

 

600,000 software-controlled power on/off cycles

 

20,000 hard power on/off cycles