RickMakes

In this video, I go over the procedure to boot a Raspberry Pi 4 from a USB flash drive. This technique still requires the bootloader on a microSD card. You can use a small, slow microSD card for this as it is only used for bootloading. I also do a benchmark comparison between the microSD card and the USB flash drive. You will still need a microSD card with the boot loader on it as the Raspberry Pi 4 doesn’t currently support booting from USB without it. This technique also works on previous versions of the Pi.

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Measure Write Performance

dd if=/dev/zero of=temp.txt bs=1M count=1024 oflag=direct

Measure Read Performance

dd if=temp.txt of=/dev/null bs=1M count=1024 iflag=direct

View Block Devices

sudo blkid

Edit cmdline.txt

sudo mousepad /boot/cmdline.txt

Edit /etc/fstab

sudo mousepad /etc/fstab

In this video, I go over the procedure to boot a Raspberry Pi 3 from a USB flash drive. You do need a microSD card for the initial setup but after configuration, it is no longer needed.

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