[CentOS] OT: DVD and other things

[Paul]

On Thu, 2005-07-28 at 22:45 -0400, Peter Arremann wrote:
> On Thursday 28 July 2005 22:11, Paul wrote:
> > On Thu, 2005-07-28 at 08:44 -0500, Bryan J. Smith wrote:
> > > On Thu, 2005-07-28 at 08:44 -0400, Peter Arremann wrote:
> > > > *sighs* BS level exceeded...
> > >
> > > DVD-RAM is the most reliable, long-term optical archiving format.
> >
> > Well other than the name, it does not have anything in common with DVD
> > because IIRC it's a Magneto Optical drive ... totally different Tech.
> Close - its PD, not MO... PD means that the intensity of the laser is varied 
> to change the phase and therefore the way the laser is reflected. Reading and 
> writing is both done with the laster.

OK same tech as the Panasonic PD drives that stored 650MB/side ... of
course I'm starting to wonder about my memory now.  Either way you can't
stick them in a normal DVD drive and read them.

Paul

> 
> MO means a laser is heating up the magnetic materical enough so the write head 
> can change the magnetic domains. Once the material cools down again enough, 
> the orientation of the domains can no longer be changed. 
> 
> Peter.
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