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Re: magnets in HDs

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rblaisdell-at-juno-dot-com>

They are                 Neodymium rare earth magnets....in most cases.


On Wed, 08 May 2002 07:58:43 -0600 "Tesla list" <tesla-at-pupman-dot-com>
> 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