21:0121:01, 15 February 2007diffhist−102
DVD+RW
Remove "Note: You must use burning software to erase, edit, or add data, unlike a removable hard disk." - This is not true under many operating systems such as Linux.
04:5404:54, 26 January 2007diffhist−3
Disc rot
There is no "data carrying layer" - The pits and bumps are stamped in the CD or burned into a dye or phase-change alloy.