From: [email protected]
Date: Tue May 16 2000 - 12:24:05 PDT
There are no industry specs for magnetic susceptibility for hard drives.
IBM Server Class hard drives are tested to the following limits:
DC to 400 Hz 5.0 Gauss
400 Hz to 5 kHz 2.0 Gauss
5 kHz to 50 kHz 0.5 Gauss
50 kHz to 200 kHz 0.1 Gauss
Regards, Ravinder
PCB Development and Design Department
IBM Corporation - Storage Systems Division
Email: [email protected]
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[email protected] (Jan Vercammen)@silab.eng.sun.com on 05/16/2000
06:00:31 AM
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Subject: [SI-LIST] : susceptibility hard disks
hello,
I hope someone can help me with the following question:
What is the susceptibility of (current) hard disks with respect to DC and
low frequency (< 100kHz) magnetic fields.
I have found specs in old manuals (Conner disks, at least 10 yr old) which
list
6 Gauss max. (DC to 700kHz). On the Seagate web site I have found a single
spec of
max. 5 Gauss for a small hard disk (4.2Gbyte).
Probably others have encountered similar questions and I was hoping that
the si-list
could help me on this problem or at least direct me to some useful sites.
regards,
Jan Vercammen
Agfa-Gevaert, EMC/PCB Engineering
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