Exploding CDs

Glyn Grinstead glyn at uk.freebsd.org
Fri Aug 18 20:08:12 BST 2006


On Fri, Aug 18, 2006 at 05:56:49PM +0100, Frank Mitchell wrote:
> Just before disintegrating, these disks assumed a sort of corrugated
> appearance, which suggests the problem is caused by Resonant Frequency (as
> with the Tacoma Narrows bridge) rather than "Centrifugal Force". The CD
> vibrates with alternate sectors oscillating in opposite directions. When the
> speed of the drive matches the Natural Frequency of the CD, the amplitude of
> the vibration gets large enough to crack the disk, which then falls to
> pieces.
> 
> Does anybody have more information about this?

Not about how they deform, but some more exploding CDs and DVDs can be
found here:

http://www.qedata.se/e_js_n-cdrom.htm




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