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NASA lost contact with its Mars helicopter (www.theverge.com)

submitted 9 months ago by Rapidcreek@lemmy.world to c/technology@lemmy.world

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[–] user224@lemmy.sdf.org 52 points 9 months ago (1 children)

Especially considering the use of off-the-shelf Snapdragon 801.

There's some nice discussion about Ingenuity here: https://news.ycombinator.com/item?id=26177619

...This processor will have not flips on Mars, possibly up to every few minutes. Their solution is to hold two copies of memory and double check operations as much as possible, and if any difference is detected they simply reboot. Ingenuity will start to fall out of the sky, but it can go through a full reboot and come back online in a few hundred milliseconds to continue flying.
-jhurliman

[–] httpjames@sh.itjust.works 51 points 9 months ago (1 children)

Reboot mid flight is a funny solution

[–] MossyFeathers@pawb.social 27 points 9 months ago (3 children)

Imagine telling an airline pilot to just reboot the whole plane if something goes wrong.

[–] Rhaedas@kbin.social 16 points 9 months ago (1 children)

During a flight is a bit much, but some aircraft have a reboot between flights as a standard procedure to fix glitches that would happen if the plane was left on for the entire time.

[–] Noodle07@lemmy.world 1 points 9 months ago (1 children)

Planes running windows?

[–] Rhaedas@kbin.social 2 points 9 months ago

Nothing that high level. Different systems are running independently, some may be redundant to each other in case one fails. But run something long enough especially in extreme conditions and things can drift from the baselines. If a power off and on regularly prevents that it's a lot easier than trying to chase down gremlins that could be different each time they pop up for different reasons.

Even NASA I believe has done such resets from Apollo through the unmanned probes from time to time. Mentioning Windows, the newest versions don't really do this baseline reset if you just shut them down, even if you disable the hibernate/sleep modes, while a restart does.

[–] SharkAttak@kbin.social 6 points 9 months ago

"Tower, we have some problems"
"Have you tried turning it off and on again?"

[–] Dettweiler42@lemm.ee 3 points 9 months ago

You'd be surprised. We only do that on the ground, though.