IBM IC25N020ATDA04 - Travelstar 20 GB Hard Drive - Magnetic Fields; Figure 22. Magnetic Flux Density Limits; Radiation Noise; Conductive Noise

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 drive functions without experiencing degradation of the soft error rate under the following magnetic
flux density limits at the surface of the enclosure.
0.5201–400
1101–200
2.561–100
50–60
Limits (Gauss RMS)Frequency (KHz)
Figure 22. Magnetic flux density limits
6.1.2.2 Conductive noise
The disk drive functions without degradation of the soft error rate in the frequency range from DC to
20 MHz when
AC
current of up to 45 mA (p-p) is injected through any two of the mounting screw holes of
the drive by means of a 50 Ω resistor.
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
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