Comment by dividuum
17 hours ago
I guess "Diskless" was defined by the same people that invented the term "Serverless"? That Pi is still using an SD card to boot from.
A Pi with Ethernet can truly boot diskless via TFTP. And later Pi4 and Pi5 can even boot directly from the internet by getting their initial "boot.img" FAT partition via HTTP from anywhere. That would be diskless.
except in RAM based OS the page size and computation resources reduce significantly as OS is using the same memory to run instead of reading from disk and eating up critical memory area for applications, only thing in between a full crash and OS is the swap storage, macOS and Windows would never be even able to achieve this it is possible only due to Linux/BSD and it's level of optimization.
a better way would be to boot via nvme SSD, ethernet boot has a dependency of network, what if you need to debug when network is down or debug the errors/bugs network itself ?