14 Mar
2005
14 Mar
'05
3:12 p.m.
Richard Bristol wrote:
(5) I don't burn more than 85% of the capacity
of a DVD. DVDs are a sandwich, lexan (polycarbonate)
on both sides, data layer chemistry in the middle.
The spiral starts on the inside (opposite LP records).
If you leave 3/4" unused at the outside edge, it will
take longer before the Ozone and 02 and other environmental
exposures that attack the data chemistry at the edges
of the lexan sandwitch actually reach your data. So on
a "4.7GB" disk which in real life could hold 4.3GB, I
burn 3.8GB.
Interesting approach.
Curious though ... why do the edges get attacked first? Are the disks
slapped together in some sort of fashion such that there exists a potential
breach at the edges?