Live data from Hacker News

Harder Drive: Hard drives we didn't want or need (2022) [pdf]

tom7.org

21–26 of 26 posts

Re: Harder Drive: Hard drives we didn't want or need (2022) [pdf]

#22
post #13

Earlier quoted context omitted.

Sure. You can also do radio moonbounce, which radio hams routinely do.[1] About 2.5 secs of lag. It takes a sizable antenna. You could probably use that as a delay line. Noisy, so error correction will be necessary. Laser moonbounce is harder to do than radio.[2] Early systems used so much laser power that they had to be equipped with radars to turn the system off if aircraft were in the area. Later systems with safe…

Would you have a working link to that second PDF?

Radio link?

Re: Harder Drive: Hard drives we didn't want or need (2022) [pdf]

#23
post #12

For those who might not be aware, early computer memory relied on essentially the same principle: https://en.wikipedia.org/wiki/Delay-line_memory

I have a crazy idea. The round trip travel time of light to the moon and back is about 3 seconds, and we did leave a mirror up there. At modern modulation rates and with multiple frequencies of light in use at the same time (aka different color lasers), a lot of data can fit into that 3 second window. A memory made of the vacuum of space. The lightest hard drive ever.

No spoilers, but I think you would enjoy this short story: https://qntm.org/transi

Re: Harder Drive: Hard drives we didn't want or need (2022) [pdf]

#24

I think this is a candidate for best two sentence combo ever written: So we have 1 million chainsaws per second, for 335.36 hours, which is 1.215 × 10^12, a configuration known as tera-wield. This requires expert juggling skills.

I would nominate this one > Tetris is an inventory-management survival-horror game with 19 principal characters, each with its own story arc

Not a 2 sentence combo. Also, for the confused, there are 19 characters if you consider non-trivial rotation to be switching between different characters.

Re: Harder Drive: Hard drives we didn't want or need (2022) [pdf]

#25
post #20
post #16

Earlier quoted context omitted.

This seems more like the airplanes problem than my problem...

The judge is unlikely to agree with you.

But I already have an insanity defense, based on the fact I was using the retroreflectors on the moon for data storage.
Post reply on HN