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Can magnets screw up or erase DVDs?


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10 replies to this topic

#1 of 11 OFFLINE   StephenA

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Posted January 30 2002 - 01:12 PM

Earlier while watching Shrek, I was cleaning the area I was sitting at. Not thinking, I put a magnet on the case, which had the second disc in it. I quckly realized what I did, and took it off. I put the disc in my player, and it started out ok. I'll have to check it thouroughly later. I hope I didn't do anything to screw it up.

#2 of 11 OFFLINE   Brian Kidd

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Posted January 30 2002 - 01:13 PM

DVDs are optical, mot magnetic, media. You have nothing to worry about. Now, if you try that with a videotape, you're up a creek.
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#3 of 11 OFFLINE   Tony_Faville

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Posted January 30 2002 - 01:13 PM

Uh, no..... DVD's are laser/light based, a magnet will not affect them.

#4 of 11 OFFLINE   StephenA

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Posted January 30 2002 - 01:17 PM

Ok, thanks. I just wanted to make sure. Better to be safe than sorry.

#5 of 11 OFFLINE   Julie K

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Posted January 30 2002 - 01:19 PM

Just don't drop a big one on your DVD Posted Image
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#6 of 11 OFFLINE   Horatio Jones

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Posted January 30 2002 - 01:28 PM

indeed don't drop one Posted Image

#7 of 11 OFFLINE   Eric Huffstutler

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Posted January 30 2002 - 02:00 PM

DVD's are like music CD's and manufactured much the same way. The data is "pressed" into a metallic layer, not magnetically recorded like tapes or floppy discs so there is no way to erase the information. No more so than erasing a vinyl 45rpm record (you do remember them don't you) Posted Image

#8 of 11 OFFLINE   Nick_Scott

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Posted January 30 2002 - 02:21 PM

_____________________________________________ ...so there is no way to erase information.. _____________________________________________ On a related note: My DVD players manual (RC5231z) says do NOT put CD-R, or DVD-R discs into the player. It will erase the information.

#9 of 11 OFFLINE   Kwang Suh

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Posted January 30 2002 - 02:29 PM

If you hit your DVD with a magnet, then you could have a problem Posted Image

#10 of 11 OFFLINE   Julie K

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Posted January 30 2002 - 02:43 PM

Ways to destroy a DVD with a magnet: Drop 500 pound magnet onto DVD. Pour sand onto DVD surface and rub magnet across it - "erasing" the disc. Tie string around magnet. Attach to hole in DVD to use as weight in a jar of hydrochloric acid. Melt magnet and shape into bullet. Fire from large caliber rifle at DVD.
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#11 of 11 OFFLINE   Dennis Nicholls

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Posted January 30 2002 - 04:19 PM

Actually if you melted a magnet and formed it into a bullet, most likely the magnetism would cease due to the domains realigning due to the great heat. However it would still blow holes in a DVD. Posted Image



Actually if you got a really big magnet (think physics particle accelerators) and ran a DVD past it, the eddy currents may deform the metal layer within the DVD. One of my crazier physics profs working at SLAC once put his head through a large magnet there and said he "saw" strange colors.... Posted Image

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