3 ms·

I'd be curious to know some technical details on the deployment process, such as the byte size, how long it took to send, any unique challenges. It must be high

by cal85 4y ago

I'd be curious to know some technical details on the deployment process, such as the byte size, how long it took to send, any unique challenges. It must be high stakes. Imagine if they accidentally bricked it with a bad update.

replygirl 4y ago
From 2012: https://www.wired.com/2012/08/nasa-patch/ https://www.wired.com/2012/08/nasa-patch/ This has likely changed, especially after this most recent update, but: > "The process took four days" > "On the first day of the software update, the team deployed a temporary version of the new software to the rover's primary computer. This version was only held in RAM so that the computer would revert back to the previous version when it restarted. This gave the team a chance to make sure everything was functioning properly. On the second day the team deployed a more permanent version of the update to the computer's file system. On the third day they deployed the temporary version to the backup computer and on the fourth day they deployed the permanent version to the backup computer." > "every interaction takes about 30 minutes: 14 minutes to send a signal to the rover in space, 14 minutes to get a response" > "it only took a few minutes for the software to actually install" --- On the hardware: https://venturebeat.com/business/sending-a-software-update-through-space-to-the-curiosity-rover-on-mars/ https://venturebeat.com/business/sending-a-software-update-t... > "Curiosity Rover is powered by a pair of computers built by BAE Systems. These RAD750 computers use a 10-year-old IBM PowerPC microprocessor running at 132 megahertz. It has just 120 megabytes of random access memory... doesn’t have enough memory for both the landing and surface missions" NASA have been using RAD750s since 2005, most recently on JWST. BAE has a successor in the RAD510, but it looks like NASA are switching from PowerPC to RISC-V with the SiFive X280: https://www.talospace.com/2022/09/the-rad750s-successor-looks-like-its.html https://www.talospace.com/2022/09/the-rad750s-successor-look...
- fatneckbeard 4y ago
  15 minutes to respond, reminds me of the systems we use at work
  - jeremyjh 4y ago
    Clicking the "Leaving Meeting" button in Teams is sometimes like that...
- ge96 4y ago
  wow, thinking it must have good error correction

by cal85 4y ago

replygirl 4y ago

From 2012: https://www.wired.com/2012/08/nasa-patch/ https://www.wired.com/2012/08/nasa-patch/ This has likely changed, especially after this most recent update, but: > "The process took four days" > "On the first day of the software update, the team deployed a temporary version of the new software to the rover's primary computer. This version was only held in RAM so that the computer would revert back to the previous version when it restarted. This gave the team a chance to make sure everything was functioning properly. On the second day the team deployed a more permanent version of the update to the computer's file system. On the third day they deployed the temporary version to the backup computer and on the fourth day they deployed the permanent version to the backup computer." > "every interaction takes about 30 minutes: 14 minutes to send a signal to the rover in space, 14 minutes to get a response" > "it only took a few minutes for the software to actually install" --- On the hardware: https://venturebeat.com/business/sending-a-software-update-through-space-to-the-curiosity-rover-on-mars/ https://venturebeat.com/business/sending-a-software-update-t... > "Curiosity Rover is powered by a pair of computers built by BAE Systems. These RAD750 computers use a 10-year-old IBM PowerPC microprocessor running at 132 megahertz. It has just 120 megabytes of random access memory... doesn’t have enough memory for both the landing and surface missions" NASA have been using RAD750s since 2005, most recently on JWST. BAE has a successor in the RAD510, but it looks like NASA are switching from PowerPC to RISC-V with the SiFive X280: https://www.talospace.com/2022/09/the-rad750s-successor-looks-like-its.html https://www.talospace.com/2022/09/the-rad750s-successor-look...

fatneckbeard 4y ago
15 minutes to respond, reminds me of the systems we use at work
- jeremyjh 4y ago
  Clicking the "Leaving Meeting" button in Teams is sometimes like that...
ge96 4y ago
wow, thinking it must have good error correction