DiscImageCreator VS ElegantOTA

I can recommend https://github.com/saramibreak/DiscImageCreator . It handles all kinds of weird formats and copy protections, and it's open source! You can use https://github.com/SabreTools/MPF as the frontend if you like.

DiscImageCreator for making a complete backup (if drive is supported, otherwise use Alcohol 120%), and MakeMKV for ripping the video files from the DVD or ISO image. WinCDEmu is useful for mounting and as an alternative for creating an ISO image.

Aaru and DiscImageCreator are the best tools available for proper preservation of weird copy protected discs. They may or may not support your drive properly, though.

Why not use DiscImageCreator? It's command line, open source, has among the best handling of copy protected discs (especially game discs), and also collects a bunch of other data about the disc that can potentially be useful for archival purposes (subchannel data, pressing offset information, etc.).

Try DiscImageCreator. It's a command line tool with lots of options including how many read retries to do, etc. There's also a GUI called MPF (Media Preservation Frontend) available.

As u/__deeetz__ pointed out, the esp32 already had a good OTA mechanism, and there are some libraries that simplify the whole process - probably one of the more popular ones is ElegantOTA: https://github.com/ayushsharma82/ElegantOTA If I understand what you're doing correctly, you'll really have just 2 layers, not 3 - one being your application (which effectively has the Kernel/OS compiled in), and then your scripting/LUA component. Technically the ESP32 also has a bootloader portion, but it's pretty uncommon to need to modify that in any way, so I would highly recommend against doing that. As far as dealing with the LUA scripts - you can easily download and run those - you'll store them into NV ram, and I believe the current recommended format is LittleFS. Keep in mind that on a normal ESP32 configured to do OTA updates there's 4MB of storage, 2x 1.8MB for the two bootable images, and ~200k for the file system (in this case LittleFS). There are also other boards which come with more flash memory, like the new S3R8 has 16MB of flash, so your OTA partitions stay about the same in most cases, but you now have ~12MB of storage, which I suspect would be way beyond anything you'd need for storing LUA.

I'm looking for a small, thin example of the ESP32 hosting a webserver to accept firmware update files for OTA updates. There's a handful of Arduino libraries that do exactly this (e.g. https://github.com/ayushsharma82/ElegantOTA) but I haven't come across anything clean that's just built around IDF.