Author: Dann Corbit
Date: 09:41:43 01/24/05
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On January 24, 2005 at 12:35:56, Dann Corbit wrote: >On January 24, 2005 at 12:33:49, Dann Corbit wrote: > >>On January 24, 2005 at 12:04:56, Dieter Buerssner wrote: >> >>>On January 24, 2005 at 11:53:38, Dann Corbit wrote: >>> >>>> It might require the square of that (so 50,000*50,000 acres). >>> >>>Dann, think again about this :-) Also, assume for a moment, you had given the >>>area in square miles instead of acres. Now square that area, or in square light >>>years - you will come to the conclusion, that almost no space at all will be >>>needed ... . And of course, if you square an area, you don't have an area >>>anymore, but rather something with dimentsion length^^4. >> >>Actually, a cube is a very good idea. The particular substance I described for >>storing data is a doped crystal (rather inexpensive too). It is the same thing >>that is used for dosimeters for people who walk around in nuclear reactors. >>When ionizing radiation strikes the crystal, it leaves tracks that can be >>measured. Using this principle, they are able to record a terrabyte in one >>square centimeter. Interesingly, you can read the whole crystal at once with >>CCDs. >> >>Now, suppose that we record in layers so that really we record data in 3 >>dimentions. Instead of a terrabyte per square centimeter, we may get 1e36 bytes >>per cubic centimeter. Now, suppose that we have some kind of loss with a factor >>of one million. That would mean 1e30 bytes per cubic centimeter. >> >>A cubic meter of this crystal could store an awful lot of information. >>Specifically, 1e90 bytes. > >Math spasm. Only 1e45 bytes, since we already had the square. >But that looks like a pretty nice number for chess. And a cubic meter of >crystal is certainly doable. Even if we need two or three of them. > >>So anything is possible, if we put our minds to it. Time for yet another retraction. Since a square centimeter gives 1e12 bytes, a cubic centimeter is only 1e18 bytes. So a cubic meter is 1e18*100*100*100 = 1e24 bytes. Not bad, but a long way to go to store a chess tree.
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