🚀 go-pugleaf

The x-ray exposure would probably have to be sufficient to cause
degraduation of the polymers and lubricants in the coatings and
substrate. As I recall, the dose to do this is in the megarad range.

Quote from NBS Special Publication 500-001, "Care and Handling of
Computer Magnetic Storage Media" by S.B. Geller:

"Recorded magnetic media are often subjected to to x-ray energy in
airport surveillance systems. Tests were performed with various recorded
magnetic media in the NBS Radiation Physics Laboratory. The media were
subjected to extremely high (lethal) x-ray dosages. No data loses were
incurred. Recorded media were also subjected to normal x-ray inspection
at two airports with no resultant loss in data"

Hope this helps.

Bill

BILL R. King, PE
Data Recovery International
2621 Brookridge Drive
Hurst, TX, 76054  USA

Tel 817-281-8901
Fax 817-656-0079

http://www.datarecover.com
brking@datarecover.com 




Bob Cousins wrote:
> 
> In <35572984.7A6A@datarecover.com>, Bill R. King wrote:
> 
> >X-rays at the exposure levels that you will encounter in airport
> >screening devices have no effect whatsoever on the magnetic properties
> >of magnetic media.
> 
> For interest, what level of X-rays would be required to cause a problem, and
> where could that level be found?
> 
> --
> Bob Cousins, Software Engineer.
> Home page at http://www.lintilla.demon.co.uk/