Date   : Thu, 14 Sep 2006 21:55:25 +0100
From   : Sprow <info@...>
Subject: Re: Domesday Disaster

In article <0C0904C2EDDE4BA7984B6BA7C1D400D9.MAI@...>,
   Ian Wolstenholme <BBCMailingList@...> wrote:

[snip]

> Next silly question - if the laser is reading the underside of the disc,
> how does it do this given that the drive tray obscures most of
> the disc surface?

Um, because the disc is spinning? 

The laser only moves along a radial line, if you replace the laser with a
felt tip pen you'd get a spiral drawn on the disc surface,
Sprow.