IBM DJSA-210 Hard Drive Specifications - Page 38

Magnetic fields - hdd

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6.1.1.1 Corrosion test The hard disk drive must be functional and show no signs of corrosion after being exposed to a temperature humidity stress of 50°C/90%RH (relative humidity) for one week followed by a temperature humidity drop to 25°C/40%RH in 2 hours. 6.1.2 Magnetic fields The disk drive will withstand radiation and conductive noise within the limits shown below. 6.1.2.1 Radiation noise The disk drive shall work without degradation of the soft error rate under the following magnetic flux density limits at the enclosure surface. Frequency (KHz) 0-60 61-100 101-200 201-400 Limits (Gauss RMS) 5 2.5 1 0.5 Figure 17. Magnetic flux density limits 6.1.2.2 Conductive noise The disk drive shall work without soft error degradation in the frequency range from DC to 20 Mhz injected through any two of the mounting screw holes of the hard disk drive (HDD) when an AC current of up to 45 mA (p-p) is applied through a series 50 ohm resistor connected to any two mounting screw holes. Travelstar 32GH/30GT/20GN hard disk drive specifications 24

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6.1.1.1
Corrosion test
The hard disk drive must be functional and show no signs of corrosion after being exposed to a
temperature humidity stress of 50°C/90%RH (relative humidity) for one week followed by a temperature
humidity drop to 25°C/40%RH in 2 hours.
6.1.2 Magnetic fields
The disk drive will withstand radiation and conductive noise within the limits shown below.
6.1.2.1 Radiation noise
The disk drive shall work without degradation of the soft error rate under the following magnetic flux
density limits at the enclosure surface.
0.5
201–400
1
101–200
2.5
61–100
5
0–60
Limits (Gauss RMS)
Frequency (KHz)
Figure 17. Magnetic flux density limits
6.1.2.2 Conductive noise
The disk drive shall work without soft error degradation in the frequency range from DC to 20 Mhz injected
through any two of the mounting screw holes of the hard disk drive (HDD) when an AC current of up to 45
mA (p-p) is applied through a series 50 ohm resistor connected to any two mounting screw holes.
Travelstar 32GH/30GT/20GN hard disk drive specifications
24