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New York, 3:39 PM
Fri Dec 4
84 posts in the last 24 hours

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  • posts about #cardreadermagnet more →

    Nifty Elecom Card Reader Sticks to Metal Surfaces
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    Dsmvwl  Admin  Promote to frontpage Approve user Ban user ×
    Image of met2art met2art
    10/27/09

    In reply to Nifty Elecom Card Reader Sticks to Metal Surfaces
    Magnetism is a very weak force. Magnetic field strength dissipates in proportion to the inverse cube of the distance. It would take a magnet of roughly 20,000 to 30,000 gauss to erase a hard drive (with several passes of varying field strength) at extremely close proximity. By comparison, the average refrigerator magnet is 10 gauss as measured at the surface of the magnet. At a distance of 1/8" the gauss rating has dropped to 2, and at further distances, the field strength is diminished almost completely for measurable effects. For most magnets under 1/4 cubic inch (ferro-ceramic or neodymium) the field strength at more than 1/2" would be insufficient to damage any modern SATA HDD (which often use neodymium magnets with a gauss field strength of upwards of 20,000 for controlling the internal mechanisms, in addition to electromagnetic fields).

    Sticking a fridge magnet on your computer case isn't going to hurt anything. You could even rub a fridge magnet on the outer surface of a 3.5" HDD with no adverse results. The enclosure is aluminum to prevent magnetic field induction, and the internal platters are purposely at least 1/8" to 1/4" from the outermost surface to allow for dissipation of all but the most intense magnetic fields.

    Finally, you could rub a flash memory card directly on a 30,000 gauss magnet, and it won't have any effect, because flash memory is not magnetic storage. #cardreadermagnet
     Reply
    met2art was starred met2art was unstarred
    Image of Gordonium Gordonium
    10/27/09

    @met2art: Thanks for the E&M refresher. You have a star for a reason. #cardreadermagnet
     Reply
    met2art promoted this comment Gordonium was starred Gordonium was unstarred
    Image of Dr. Evil Genius: has learned that MILF stands for Moro Islamic Liberation Front Dr. Evil Genius: has learned that MILF stands for Moro Islamic Liberation Front
    10/27/09

    @met2art: Congrats on your Stardom dude. You certainly deserve it. #cardreadermagnet
     Reply
    met2art promoted this comment Dr. Evil Genius: has learned that MILF stands for Moro Islamic Liberation Front was starred Dr. Evil Genius: has learned that MILF stands for Moro Islamic Liberation Front was unstarred
    Image of met2art met2art
    10/27/09

    @Dr. Evil Genius: @Gordonium: Much thanks! #cardreadermagnet
     Reply
    met2art was starred met2art was unstarred
    Image of Gary_7vn Gary_7vn
    10/27/09

    In reply to Nifty Elecom Card Reader Sticks to Metal Surfaces
    Magnets are not a problem. It's alternating magnetic fields that can mess up tapes, and the like. Memory cards are not affected by ordinary magnets. Try it at home. Put a magnet right on top of your SD card, move it around, leave it there for 3 days. Nothing will happen. #cardreadermagnet
     Reply
    Gary_7vn was starred Gary_7vn was unstarred
    Image of Odin Odin
    10/27/09

    In reply to Nifty Elecom Card Reader Sticks to Metal Surfaces
    Be as it may that a PC case probably provides enough protection against most normal magnets I still wouldn't feel comfortable with this nearby. Magnets screw up too many things to have them anywhere but a fridge. #cardreadermagnet
     Reply
    Odin was starred Odin was unstarred
    Image of bobman1235 bobman1235
    10/27/09

    @Odin: Like what exactly? Unless you're still using floppies, modern media is all but impervious to magnets except those much stronger than you'd have available to you. #cardreadermagnet
     Reply
    Odin promoted this comment bobman1235 was starred bobman1235 was unstarred
    Image of Odin Odin
    10/27/09

    @twilight-arc:
    @bobman1235:
    Oh yes I'm well aware that stuff isn't that vulnerable and fragile. Still I'd prefer to keep my data away from anything even remotely harmful.

    ...just in case. #cardreadermagnet
     Reply
    Odin was starred Odin was unstarred
    Image of geolemon geolemon
    10/27/09

    In reply to Nifty Elecom Card Reader Sticks to Metal Surfaces
    Isn't Aluminum metal? Copper?

    And do you feel good about sticking a magnet on your computer? I don't... I'm not a gamblin' man.

    Hey - hard drive cases are metal too... #cardreadermagnet
     Reply
    Barry99705 promoted this comment geolemon was starred geolemon was unstarred
    Image of Barry99705 Barry99705
    10/27/09

    @geolemon: I've stuck magnets strong enough to stop a rotating hard drive to the drive, didn't wipe out any data. #cardreadermagnet
     Reply
    Barry99705 was starred Barry99705 was unstarred
    Image of sneakypoo sneakypoo
    10/27/09

    In reply to Nifty Elecom Card Reader Sticks to Metal Surfaces
    *waits for the" OMG a magnet on your computer!?"-comments*
    edit: Forgot I was at Giz so hopefully that wont happen.
     Reply
    met2art promoted this comment Edited by sneakypoo at 10/27/09 9:50 AM sneakypoo was starred sneakypoo was unstarred
    Image of met2art met2art
    10/27/09

    @sneakypoo: Brace yourself. Apparently there are hordes of idiots storming the gates who have no clue that flash memory cards are not magnetic media. Witnessing such ignorance, especially here, makes me wince, like having salt rubbed into a wound. #cardreadermagnet
     Reply
    met2art was starred met2art was unstarred
    Image of Barry99705 Barry99705
    10/27/09

    @sneakypoo: You're joking right? That's all the reason for those comments. #cardreadermagnet
     Reply
    Barry99705 was starred Barry99705 was unstarred
    Image of Mike Zuniga: That was Unexpected Mike Zuniga: That was Unexpected
    10/27/09

    In reply to Nifty Elecom Card Reader Sticks to Metal Surfaces
    Do people still use Compact Flash? #cardreadermagnet
     Reply
    Mike Zuniga: That was Unexpected was starred Mike Zuniga: That was Unexpected was unstarred
    Image of matt buchanan matt buchanan
    10/27/09

    @Mike Zuniga: That was Unexpected: Um, if they shoot with a DSLR they do. #cardreadermagnet
     Reply
    matt buchanan was starred matt buchanan was unstarred
    Image of Gary_7vn Gary_7vn
    10/27/09

    @Mike Zuniga: That was Unexpected: Compact flash is still widely used for DSLRs. #cardreadermagnet
     Reply
    Gary_7vn was starred Gary_7vn was unstarred
    Image of Barry99705 Barry99705
    10/27/09

    @Mike Zuniga: That was Unexpected: Yes, in my Digi Rebel. #cardreadermagnet
     Reply
    Barry99705 was starred Barry99705 was unstarred
    Image of matt buchanan matt buchanan
    10/27/09

    In reply to Nifty Elecom Card Reader Sticks to Metal Surfaces
    Why doesn't it have a slot CF cards???? #cardreadermagnet
     Reply
    matt buchanan was starred matt buchanan was unstarred
    Image of met2art met2art
    10/27/09

    @matt buchanan: I'm with you. I was nodding my head, thinking, "Yes, yes... this could be good." Then the unforgivable dearth of CF support made me look away. I abhor a multiformat card reader that forsakes CF under the guise of svelte formfactor. #cardreadermagnet
     Reply
    met2art was starred met2art was unstarred
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