i would like to add a little correction here...
The drawback, however, is that HD-DVDs do not yet appear to offer many of the benefits that Blu-ray discs do. For example, HD-DVDs can deliver only 15 Gigabytes of storage in single layer or 30 Gigabytes dual-layered, a 67% drop from the 50 Gigabytes stored on dual-layered Blu-ray discs
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that\'s wrong. Let say HD-DVD is 30 GBytes dual layer divided by 50 Gbytes dual layer...
30/50 = 3/5 = .6 or 60%, that means HD-DVD have 60% the data storage of Blu Ray, not 67% drop or less than Blu Ray...
that means, it have about a 40% drop from the 50 Gbytes dual layered Blu Ray...
or how about this 50 - 30 = 20...
20/50 = .4, or 40% less than Blu Ray...
But I doubt HD-DVD can get up to 30 Gbytes dual layer since its first layer is about 15 Gbytes, and usually the second layer store a little less than the first...making it around 20ish say about 28 Gbytes...probably less if it in multiple of 1024 instead of 1,000...
Blu Ray can store 27 Gbytes single layer, making it 50 dual layers...about 4 Gbytes were sacrifice for the 2nd layer...but again, BR also round up to 50 Gbytes since its in multiple of 1,000 instead of 1,024....
28/50 equal 56%...or about 44% less...