How so? There are long-term digital storage technologies that would long outlast any book and are many orders of magnitude denser.
Nothing has been verified to work beyond 50 years, and those with data errors and failure rates.
There are those CDs made out of rock, but they have never veen proven to pass the test of time.
You're saying that something that has existed for less than 50 years doesn't count because we haven't been able to actually test it for more than 50 years, even though we understand the physics behind it and can theoretically predict how long it will last...
And a quick google reveals a lot of people are very worried about counterfeit disks too.
Any digital storage device is simply giving you a bit stream. Being able to read the bits at all might rely upon technology that no longer exists. You need to know the layout of the medium, where to start reading, how to perform any built-in error correcting, what constitutes data versus metadata. Once you read the bits, you still need to do all of that again, but this time at the level of the filesystem. Then you need to do it a third time at the level of the file format. Then you get, at best, something like a consecutive sequence of unicode code points. Now you still need to know unicode.
We have no idea if these sorts of technologies will be remembered in 3,000 years, but given the history, there's a very good chance people will still be able to read Sanskrit and Latin, and the way the human eyeball accepts and decodes light waves will not change.
If the humans of the future are all blind, I think we can forget about worrying about preserving civilization.
Ubiquitous access to reader devices is also a factor, and I can’t actually think of anything that fits that bill.
As for ubiquitous access, store a reading device or instructions on how to build one along with the data. If you're unable to do that, then I doubt you would be able to keep a massive library of books around for very long either.
There's also no financial incentive to build technologies like this. If the world actually got together and tried to build long-term digital storage then I'm sure we could come up with something even better.
An interesting technology, but also not exactly something I could get at my local Best Buy today.
M-DISC, assuming it's writable using consumer Blu-Ray writers, is promising though – Blu-Ray drives can probably still considered ubiquitous enough in a pinch.
> DNA storage
DNA is in fact extremely unstable unless it's part of living organisms that constantly error-correct and replicate it, and even then you have random mutations.
If it's digital storage, you have to have electricity, a compatible device, an understanding of the storage, and software that can read it.
And, increasingly, DRM servers that will allow you to read it.
