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Hey Alex, that was quite a writeup up it didn't really touch upon what exactly did you flash & where did it get flashed?

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That was the interesting detail that I was looking for too. I'm guessing that it's because at the bottom of the article you can see that he wants you to pay $30 for his ebook and video that will tell you how.

From my own experience, they're probably flashing the RPi4's EEPROM with an updated bootloader and config to enable netboot. Here's the official documentation on it: https://www.raspberrypi.org/documentation/computers/raspberr...

No, he says that he flashed SD cards.

> I flashed each of the Raspberry Pis using the same SD card, then I could close the case and take a note of each MAC address and serial number for later on.

But if flashing SD cards, then why do we need network boot? Or, if we have network boot, why do we need to use SD cards?

The easiest way to perform the flash is by booting into Raspbian and performing the process interactively. Without this one-time process, you can't netboot, as the default setting is the SD card, then USB: https://www.raspberrypi.org/documentation/computers/raspberr...

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