Re: magnets in HDs

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Mike Harrison by way of Terry Fritz <twftesla-at-qwest-dot-net>" <mike-at-whitewing.co.uk>

These are Neodymium-Iron-Boron magnets,
They're strong enough to do some really neat tricks with - try
dropping it into a close-fitting gap between 2 chunky bits of
aluminium (e.g. heatsinks) - it falls REAL slow due to eddy-current
braking. 

For more neodymiumania(?)....

http://www-dot-netcomuk.co.uk/~wwl/neodym.html
http://www.eskimo-dot-com/~billb/neodemo.txt


On Wed, 08 May 2002 07:58:43 -0600, you wrote:

>Original poster: "Mr Gregory Peters by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <s371034-at-student.uq.edu.au>
>
>After reading the post on magnets in hard drives, I was somewhat
>skeptical - after all, don't magnets ERASE hard drives? Anyway, I
>decided to pull apart an old 1 Gb SCSI hard drive I had lying around. It
>was difficult to find, but there is definitely a strong magnet in there.
>It is near where the read/write head "arm" connects to the HD chassis.
>It seems to be in some sort of "anti-magnet" metal enclosure, as I could
>not detect it at all with a screwdriver until I pulled it completely
>apart. It is very strong. There was only one magnet in this drive, but I
>reckon if I had two magnets I would not be able to pull them apart. The
>magnet is arc shaped, about 1.3" long x 0.5" wide x 0.2" thick. I would
>love to know what kind of magnet it is if anyone knows.
>
>Cheers,
>
>Greg Peters
>Department of Earth Sciences,
>University of Queensland, Australia
>Phone: 0402 841 677
>http://www.geocities-dot-com/gregjpeters
>
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