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Holographic Storage Overview at CNET
encebollado writes: "CNET has an article about how holography is being used to create next generation storage devices. The researchers promise they'll beat out DVD by an order of magnitude." Actually, it's an overview with four separate articles -- no bets on when the technology covered will really be available though.
A lot of people are probably asking why we don't have this technology yet.
... I doubt it'll happen before then.
One possible answer is because of the sensitivity of holographic equipment to vibrations. A hologram encodes phase differences between laser beams. Errors in the phase encoding mean errors in the data retrieval - you get a blurry or disjoint hologram, or you lose your data.
Light is in the hundreds of nanometers range of wavelength. This means a vibration in the equipment (a movement of one part relative to another) of only a tenth of a micron can completely throw the phase encoding out of alignment. Imagine a tape deck whose heads needed positioning to submicron precision.
Making holographic images is therefore rather difficult if, say, a large lorry rolls past your window. A hard-drive with the same problem would be absolutely useless.
So until a suitably hard substrate can be found on which to engineer this equipment, it's only a pipedream. Maybe nanotechnology will create such a material
interresting timeline
- IBM has lot's of hard-disk related technologies patented
- IBM has a relativly flourishing HD business
- IBM sells said HD activities (except R&D)
- IBM breaks storage records in lab with new technology
=> I'm betting IBM will come out with a new kick-ass storage technologie shitin the next 5 years
Holographic memory is not a simple metter of more bits per cm^2 or whatever. It's a different kind of memory, where every part stores the whole picture, i.e. when you break such memory into two halfs, every part still has the entire content, only with lower quality. Also, there are no fixed limits on how much information you can store on hologram — you can always store something more, which will lower the quality of the rest of stored information, but you won't hit any fixed maximum number of bits, like with standard types of memory. Saying that it "[beats] out DVD by an order of magnitude" is totally ignoring the most fundamental features of holographic memory.
Krótko: kady Erotomek
W pimiennictwie ma swój domek.
There is a pretty nice article over at How Stuff Works with a breif explanation of the history and workings of Holographic Storage Devices
I work for Tilc heavy industries and whatever I say here is not endosed by our corporation.
:> The military,government and archives are our first customers, we also have strong interest from world libraries and other such entities. IBM might go into production of Silica 48E at their Phillipines plant staring Q3 04.
We have been researching into holographic storage since way back in 94. Dr. Erwin Gupta, our senior researcher is known for his work on such storage (AFAIK he was one of the main proponats of DivX (hehehe)).
We are using Silica 48E in crystalline format to form a 3D latics that can store and information. Now for the nice part, our sturcute XI can (3 cm - 2 cm - 2 cm ) can store informations in the magniature of 78TB. Information retrival is only hapmpered by speed of axuliary pheripherials. But our test machines are now running with optical conntections to the cube, and thus storage and retrival is trivial.
The only problem we have is, how to format such huge quantities of information. By format I mean, how to place it in a viable layout. I feel this is one area where we have constantly lacked. In the past we've been using standard methods of storage (Unix filesystem type layout and b-tree, cMax cube), but this lead to storage being shrunk down by a magnitude of 15. For information that is stored in bulk (eg: Large archives that are interlaced raw, this is not an issue).
Our partner, IBM has also been very interested in the Silica 48E strucute, they are also going into research with us and I felt this was one of the reason for the closure of their HD shops (since they've felt the limit of HD's being reached and thus they are moving to better media).
Silica 48E can be mass produced cheaply, the storage opens to almost limitless quantities (Oopes.. Sorry If I'm doing a Gates 64k again). Currently we are stress testing the crystals and we have put the entire library of congress (Storage A-F (Pre 94)) in 2 crystals with an induced Cmax filesystem. Retrival is an issue here, cause such a large archive needs better tools (ours is only hardware).
I dont see crystals going into consumer use in the near future, give it 5-8 years and you'd probably seem them at the high end. Given that, it's cheaper to produce on Silica 48E cube than make 3 DVD's