9.2.2
Corrosion test
The hard disk drive shows no signs of corrosion inside or outside of hard drive assembly and is functional
after being subjected to seven days of a 50°C temperature and 90% relative humidity.
9.3 DC power requirements
The following voltage specifications apply at the drive power connector. Damage to the drive electronics
may result if the power supply cable is connected or disconnected while power is being applied to the
drive (no hot plugging or unplugging is allowed). Connections to the drive should be made from a low
voltage, isolated secondary circuit (SELV). There is no special power on/off sequencing required.
9.3.1 Input voltage
15
1
12 +10%, –8%12
7
1
5 ± 5%5
Absolute maximum spike voltage
(Volts)
During run and spin up
(Volts)
Supply Input
voltage
(Volts)
1
Power supply voltage spikes in excess of the maximum values specified in the table may damage the
drive electronics.
Figure 45. Input voltage requirements
9.3.2 Power supply current—typical
0.70.0150.10Sleep average
1.00.0150.17Standby average
10.10.630.49
Random R/W average
2
–2.001.13Random R/W peak
–2.000.80Start up (maximum)
9.80.670.34
Seek average
1
–2.000.54Seek peak
4.50.300.17Unload idle
3.20.190.17Low RPM idle
–0.500.36Idle ripple (peak-to-peak)
6.70.430.29Idle average
Amps (RMS)Amps (RMS)
Total power
(Watts)
+12 Volts PS
current
+5 Volts PS
current
Except for a peak of less than 100 us duration
1
Random seeks at 40% duty cycle.
2
Seek duty = 30%, W/R duty = 45%, Idle Duty = 25%
Figure 46. Power supply current—typical
Deskstar 60 GXP Hard disk drive specification
48
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