Researchers at the University of Southampton in the UK successfully stored the entirety of the human genome sequence onto an indestructible 5D optical memory crystal no bigger than a penny. The indestructibility claims are no joke since the discs can withstand temperatures up to 1,000°C, cosmic radiation, and even direct impact forces of 10 tons per cm2.
The ‘5D’ in the name comes from the fact that, unlike 2D markings on a piece of paper or tape, this method uses two optical dimensions and three spatial coordinates to write throughout the material.
Went to the article seeking answers but got only more questions.
https://en.m.wikipedia.org/wiki/5D_optical_data_storage
The “5-dimensional” descriptor is only a marketing term, since the device has 3 physical dimensions and no exotic higher dimensional properties. The fractal/holographic nature of its data storage is also purely 3-dimensional. The size, orientation and three-dimensional position of the nanostructures comprise the so-called five dimensions.
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Further down in the article it is a little clearer…
In this case, the 5 dimensions inside of the discs are the size and orientation in relation to the 3-dimensional position of the nanostructures. The concept of being 5-dimensional means that one disc has several different images depending on the angle that one views it from, and the magnification of the microscope used to view it.
The website even lists a little more…
In order to increase the data capacity of optical storage, there is the potential of storing more than one bit in a single voxel by implementing multiplex technology. The recently developed 5D optical storage technique uses birefringence as an extra degree of freedom – the property of a medium whereby its refractive index varies depending on the polarization and direction of incident light. Birefringence generated by the orientation and size of optical nano-gratings offers two extra dimensions, providing much higher storage capacities.
So, it’s supposedly three dimensions of position plus angle and (maybe?) polarity. So, it seems to be more than just a marketing gimmick, but I can’t find any information about the resolution of those additional two parameters, so I can’t tell if a single voxel stores two bits or two terabits.
It makes me think about how the 2.5d glass screen protectors with bevelled edge eventually became 3d for curved screen phones, then 5d, then 9d, and I’ve seen some silly 1000d and 9999d because clearly none of these marketing idiots remember what the d numbers even referred to in the first place. They used to explain what each d gave you and now its just a number and higher is better.
Seems more like 5 axis than 5 dimensions.
Sounds like a slice through the crystal that can be moved up and down and rotated through 2 angles (eg roll and pitch)
5 axis and 5 dimensions are essentially the same thing, right? A 2D graph has 2 axes, a 3D one has three, 4D graph can be shown with colour representing the 4th axis, etc.
So, as I understand it, and I don’t, 5D is just fancy marketing due to the really weird properties of the crystals used to store the data in. They are just calling properties of the crystal, dimensions.
I found the wiki page on it https://en.wikipedia.org/wiki/5D_optical_data_storage
According to the University of Southampton:
The 5-dimensional discs [have] tiny patterns printed on 3 layers within the discs. Depending on the angle they are viewed from, these patterns can look completely different. This may sound like science fiction, but it’s basically a really fancy optical illusion. In this case, the 5 dimensions inside of the discs are the size and orientation in relation to the 3-dimensional position of the nanostructures. The concept of being 5-dimensional means that one disc has several different images depending on the angle that one views it from, and the magnification of the microscope used to view it. Basically, each disc has multiple layers of micro and macro level images.[16]
It’s actually cromulent technical terminology to call those extra degrees of freedom “dimensions”, it’s only in common parlance that “dimension” is restricted specifically to spatial dimension. Having hundreds or even thousands of dimensions is not unknown in data science.
This is how we make the magic orbs a reality
They say “billions of years” but that sounds like just the sort of thing a stray cosmic ray would ruin.
Maybe they’re planning on using a checksum for error correction like they do with RAID.
On that timescale, what are the odds that the checksum is still reliable?
Why would it be any different from the real data? Checksumming is basically just writing extra copies with math.
I’m asking why it would be more reliable if it has the same vulnerability to being corrupted.
What would be the point? You would just know that the data is invalid. You couldn’t fix it
Nice. We need something like this. Digital archiving is still best done on magnetic tape as disk and flash drives all fail after a few decades. But even for regular users, it’d be nice to keep a digital copy of family photos that lasts forever.
As someone who works in a digital archives, let me tell you that the honest to god problem with old tape is that you have to find an old tape reader (drive) that works. Tape from those old IBM reals still works if its not exposed to the elements. But like the modern LTO stuff, finding a reader for that old stuff is the challenge.