So how did they do this?  In today's snail mail I received a physical shipment of SQL2012 on a DVD.  On that DVD are "Business Intelligence", "Developer", "Enterprise", "Enterprise Core", and "Web" versions of SQL2012.  This disk is formatted with 4.26 GB of space according to Windows.


Copied to a network location the files are roughly 24 GB in size.  So how did they fit that all on one DVD?  The disc is not blue-ray.  Is this a case of "de-duping"?


Needless to say I was surprised by the results.  The disk does not appear to be damaged in any manner.