magnets a lot of fun but pretty harmless
or are they could it be possible for
this small bar of metal to wipe the
memory off this laptop destroying my
life’s work the theory is that if you
leave your laptop near a sufficiently
big magnet it will erase or scramble
everything on its hard drive to
understand how this could happen we need
to go back to basics hard drive store
information magnetically you can see how
this magnet can change the direction of
these iron filings while a hard drive
works in a similar way the disk is
coated with a magnetically sensitive
material that can be re orientated by
this read/write head to form numerous
patterns that the Machine interprets as
information this information can be
added to or deleted in the form of
programs text and images so if it’s
susceptible to an internal magnetic
source surely it should be affected by
an external one but just how powerful
does the magnet have to be this is a
kid’s toy it’s too small elliptical
magnets that rattle together noisy but
not very powerful the question is would
they bother our machine the effect if
there’s the B 1 will be instantaneous
that doesn’t seem to be doing anything
this is roughly where the hard drive is
so no this obviously isn’t working we’re
gonna have to up the ante and use a
bigger magnet
this is a Gauss meter which measures
magnetic force it shows that this big
magnet is over three times more powerful
than the toys it can pick up several
hundred paperclips without a sweat so
let’s give it a go all right no now I’m
slightly relieved my date is still
intact but in the interest of science
I’m gonna give the magnet a bit of a
boost by wrapping a coil of wire around
the magnet and passing a current through
it you create a more powerful
electromagnet in this case around 30%
stronger than before but our little
computer didn’t even blink it was time
to get really serious this company
builds massive electromagnets the type
used to pick up cars in scrap yards
surprisingly it’s only twice as powerful
as our small homemade job but can apply
that force over a much larger area
after 22 seconds of raw electromagnetic
force and it survived I powered it up
and nothing was it really dead we had to
be sure so we had it checked out by a
computer data retrieval company this one
is dead by scrambling every particle on
the surface of the disk the big magnet
had instantly wiped out every operating
program and every file stored on the
computer there was literally no
information left for it to read but it
had taken some fairly extreme measures
to achieve it
so it seems our magnetic data is safe
from everyday life
just be sure to avoid any giant
electromagnets
or are they could it be possible for
this small bar of metal to wipe the
memory off this laptop destroying my
life’s work the theory is that if you
leave your laptop near a sufficiently
big magnet it will erase or scramble
everything on its hard drive to
understand how this could happen we need
to go back to basics hard drive store
information magnetically you can see how
this magnet can change the direction of
these iron filings while a hard drive
works in a similar way the disk is
coated with a magnetically sensitive
material that can be re orientated by
this read/write head to form numerous
patterns that the Machine interprets as
information this information can be
added to or deleted in the form of
programs text and images so if it’s
susceptible to an internal magnetic
source surely it should be affected by
an external one but just how powerful
does the magnet have to be this is a
kid’s toy it’s too small elliptical
magnets that rattle together noisy but
not very powerful the question is would
they bother our machine the effect if
there’s the B 1 will be instantaneous
that doesn’t seem to be doing anything
this is roughly where the hard drive is
so no this obviously isn’t working we’re
gonna have to up the ante and use a
bigger magnet
this is a Gauss meter which measures
magnetic force it shows that this big
magnet is over three times more powerful
than the toys it can pick up several
hundred paperclips without a sweat so
let’s give it a go all right no now I’m
slightly relieved my date is still
intact but in the interest of science
I’m gonna give the magnet a bit of a
boost by wrapping a coil of wire around
the magnet and passing a current through
it you create a more powerful
electromagnet in this case around 30%
stronger than before but our little
computer didn’t even blink it was time
to get really serious this company
builds massive electromagnets the type
used to pick up cars in scrap yards
surprisingly it’s only twice as powerful
as our small homemade job but can apply
that force over a much larger area
after 22 seconds of raw electromagnetic
force and it survived I powered it up
and nothing was it really dead we had to
be sure so we had it checked out by a
computer data retrieval company this one
is dead by scrambling every particle on
the surface of the disk the big magnet
had instantly wiped out every operating
program and every file stored on the
computer there was literally no
information left for it to read but it
had taken some fairly extreme measures
to achieve it
so it seems our magnetic data is safe
from everyday life
just be sure to avoid any giant
electromagnets
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