12-08-2005, 03:06 AM
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#1
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Space Monkey
Join Date: 11 Aug 2005
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New disc format - VMD/FMD (100GB - 1 TB in a few years) - Rev should use it.
http://www.sysopt.com/articles/c3d-spot/cleardisc.jpg
I've done some research about VMDsn and FMDs, its color, and how the game title could be impressed on it, and it's pretty interesting, it's long, but a must read.
First: What's a VMD/FMD? The VMD (Versatile Multilayer Disc) and FMD (Fluorescent Multilayer Disc) are media storage units which allow data to be stored in multiple layers on a CD (up to 20 right now, and potentially up to 100 within a few years). Since each layer of a DVD data density format disc can store 4.7GB of data, 20 layers means approximately 95GB of storage on a single disc, with an access speed of 50-60ms and a data transfer rate of approximately 1 Gigabit per second. Constellation 3D's research has shown that 100 layers are possible, which would allow a single 120mm CD to store 450GB+. If a blue laser was utilized (which has a smaller wavelength than red laser, but is currently expensive to manufacture and too hot for consumer applications), 1 TeraByte is possible. If that isn't revolutionary, I don't know what is. Here's the FMD:
http://www.sysopt.com/articles/c3d-spot/cleardisc.jpg
http://www.sysopt.com/articles/c3d-spot/cleardisc.jpg
About the color, I can't answer yet. I've found the VMD, FMD and Sony HD ROM (High Density Read-Only Memory - Pic) which are all transparent but the VMD is orange, the FMD totally transparent and the HD ROM is blue. Since VMD uses red laser and HD ROM blue laser, it can be a coincidence or not.
But which is most important, those totally transparent discs are just clear discs and may be labelled. Look at this pic to know how a double layer disc works, you can see the last layer is a polycarbonate substrate one which can be labelled. I think it's safe to say that a multilayer disc works similarly, but with much more layers, and they can be easily labelled, or not only VMD/FMD game discs, but all multilayer discs in world would look the same. Note the HD ROM is transparent but labelled.
Some comparisons:
Single layer HD DVD - 15 GB with blue laser
Double layer HD DVD - 30 GB with blue laser
Single layer Blue Ray - 23-27 GB with blue laser
VMD - 100 GB with RED laser
FMD - 100 GB with red laser
500 GB with red laser in a few years
1 TB (1000 GB) with blue laser in a few years
What's great about Blue Ray/HD DVD: enhances laser and the read side. A Blue Ray layer contain much more info than a DVD one, and it requires blue laser (which have a frequncy than the read one)
What's great about VMD: It enhances the number of layers: there's 20 now, there will be 100 in a few years.
FMD is the combination of both, since it can also be read by blue laser. Then, more layers, more info by layer = 1 TB
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