In order to archive video from my camcorder I create 16 Gb custom dmg's with disk utility. I am running Mountain Lion 10.8.2. I have been able to do this, without problems, before with Lion and Snow Leopard. However, now with Mountain Lion I can't create custom dmg's over 1GB. I can create dvd dmg's and dmg's under 1 gibabyte. The error message I get is "resource busy." Any help would be appreciated.