Again, you read right, my friends. Them newfangled disc things just ain't gonna cut it with all that fancy-schmancy stuff they got today!
Case in point: The longest concert in the world.
A piece by American composer John Cage (Muiadib: "American?! :-&") called "organ2/ASLSP" (As Slow As Possible) is being performed in Germany and will take exactly 639 years to complete.
If we were to turn that into a standard MP3, it would be 293.27 PB (petabytes).
Or 300,312.4 TB.
You would need 77 HVD's to hold that.
And let's not even begin to speculate how many would be needed to hold all music ever recorded...because there's actually no way to determine that right now; no one knows how much music is currently out there. Ah well. I can tell you, however, that an HVD can hold about 918,528 songs (with an average length of 3:30).
And in case you were making plans to dump your music (and everything else) onto one of these things...
The first HVD's (200 GB) are to (supposedly) be sold this summer for around $120 apiece. The drive will be around $15,000.
Here's some linkies:
http://www.optware.co.jp/english/what_040823.htmhttp://en.wikipedia.org/wiki/Holographic_Versatile_Disc