Long Term archiving & Nuclear Blasts... (Score 1)

Something many articles fail to mention in regards to long term archiving is magnetic waves damaging the media. Don't nuclear blasts have a magnetic wave that will wipe out any magnetic media? If so, then some form of optical storage would seem necessary. Of course, there is always the argument that if we have a nuclear blast, we are screwed -- but imagine a small one just out of direct harms way, and you have important historical data stored... all gone. Also, I have seen many people suggest 2 copies stored in different locations -- but I like to take this one step further... two copies on TWO different name brands of media stored in different locations. What if one manufacturor had a bad run of CDs?... having two copies will be useless. I remember an article a few years back that said audio CD's were degrading too (from the 80s) -- apparently temperature shifts can cause the metal to separate from the plastic. Lastly, anyone notice how high the failure rate of 1.44 MB floppy disks is right of the box? I seem to find bad ones all the time... compare that to my floppies from the 80s, we use to punch a hole and use the backside (which was suppose to be the lower quality side) all the time and have a pretty good success rate.