3 Oct
2011
3 Oct
'11
11:28 a.m.
On 10/3/11 10:49 AM, Chuck Guzis wrote:
I own a fairly strong degausser that I use on
diskettes. For it to
be effective, the disk must almost be in contact with the surface of
the degausser. With only an inch of separation, almost nothing
happens. The material used in floppy disk emulsions has a pretty
"square" magnetization curve.
That is exactly the conclusion in the paper I uploaded.
If you look at the graphs, it is very difficult to accidentally erase
digital magnetic media. That has been my experience as well. I have had
much more trouble with physical media failure than the magnetization
going away.