U4 Family Product Manual, Rev. D

3

 

 

 

 

 

 

 

 

 

Drive Specification

ST32112A

 

ST34311A

ST36421A

 

ST38421A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Track-to-track seek time

 

 

 

 

 

 

 

(msec typical)

 

 

2.0 (read), 2.75 (write)

 

 

 

 

 

 

 

 

 

 

Average seek time (msec

 

 

 

 

 

 

 

typical)

 

 

10.5 (read), 11.5 (write)

 

 

 

 

 

 

 

 

 

 

Full-stroke seek time

 

 

 

 

 

 

 

(msec typical)

 

 

24.0 (read), 26.0 (write)

 

 

 

 

 

 

 

 

Average latency (msec)

 

 

5.56 msec

 

 

 

 

 

 

 

 

 

 

Power-on to ready

 

 

 

 

 

 

 

(sec typical)

 

 

8 sec

 

 

 

 

 

 

 

 

 

 

Standby to ready

 

 

 

 

 

 

 

(sec typical)

 

 

7 sec

 

 

 

 

 

 

 

 

 

 

Startup current (typical):

 

 

 

 

 

 

 

12V (peak)

 

 

1.5 amps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Seek power (typical)

 

 

7.0 watts

 

 

 

 

 

 

 

 

Idle mode (typical)

 

 

3.1 watts

 

 

 

 

 

 

 

 

Standby mode (typical)

 

 

0.8 watts

 

 

 

 

 

 

 

 

Sleep mode (typical)

 

 

0.8 watts

 

 

 

 

 

 

 

 

 

 

Voltage tolerance

 

 

5V ± 5%, 12V ± 10%

 

 

(including noise)

 

 

 

 

 

 

 

Ambient temperature

0° to 55°C (op.), –40° to 70°C (nonop.)

 

 

 

 

 

 

 

 

 

Temperature gradient

 

 

 

 

 

 

 

(°C per hour max)

 

 

20°C

 

 

 

 

 

 

 

 

Relative humidity

 

 

5% to 90% (op.)

 

 

(op. and nonop.)

 

 

5% to 95% (nonop.)

 

 

 

 

 

 

 

 

 

 

Relative humidity

 

 

 

 

 

 

 

gradient

 

 

30% per hour max

 

 

 

 

 

 

 

 

 

 

Wet bulb temperature

 

 

 

 

 

 

 

(°C max)

 

 

29.4 (op.), 40.0 (nonop.)

 

 

 

 

 

Altitude, operating

–61 m to 3,048 m (–200 ft to 10,000+ ft)

 

 

 

 

Altitude, nonoperating

–122 m to 12,192 m (–400 ft to 40,000+ ft)

 

 

 

 

 

 

 

 

 

Shock (Gs at 2 msec)

 

 

 

 

 

 

 

operating

 

 

63 Gs

 

 

nonoperating

 

 

300 Gs

 

 

 

 

 

 

 

Vibration, operating

 

0.5 Gs (0 to peak, 5–350 Hz)

 

 

 

 

 

 

 

 

 

 

Page 11
Image 11
Seagate ST34311A, ST32112A, ST38421A, ST36421A manual Track-to-track seek time Msec typical