Re: magnets in HDs

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

Original poster: "BunnyKiller by way of Terry Fritz <twftesla-at-qwest-dot-net>" <bigfoo39-at-telocity-dot-com>

Tesla list 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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Hi Greg...

these are Neodimium ( spelling) magnets...  they are some of the most 
potent magnets around...  If you had 2 of them and by accident put your 
finger between them, you would get a serious blood blister. They are 
POTENT little magnets....  quite capable of deflecting EMF and 
perminently damaging your computer screen from 12"...

what I have always wondered is why you cant put a magnet back together 
once you break one in half.....  the joint is perfectly matched .....   
but it still repells each of the matching halves no matter how hard 
t\you try to press them back together....  :)

Scot D