semiautomatix
Honorary Master
Holographic Versatile Disc (HVD) is an optical disc technology which would hold up to 3.9 terabytes (TB) of information. It employs a technique known as collinear holography, whereby two lasers, one red and one green, are collimated in a single beam. The green laser reads data encoded as laser interference fringes from a holographic layer near the top of the disc while the red laser is used as the reference beam and to read servo information from a regular CD-style aluminum layer near the bottom. Servo information is used to monitor the position of the read head over the disc, similar to the head, track, and sector information on a conventional hard disk drive. On a CD or DVD this servo information is interspersed amongst the data.
http://en.wikipedia.org/wiki/Holographic_Versatile_Disc
Standards with 200 and 300 GB storage are under development and prototypes expected in 2008
So while the Sony fanbois may lament over the Blu-ray format win, I feel it will be very shortlived. Any comments?