How to update ubuntu-20.04.3-preinstalled-server-armhf+raspi.img.xz to work with USB Boot?

ng flag

Anyone know how to update the boot loaded on ubuntu-20.04.3-preinstalled-server-armhf+raspi.img.xz so it will work with USB boot? Or switch it to use u-boot? If I install & update from a SD card everything is fine. Then backup the SD card and install it on a USB HD, same problem, system will not boot. The normal RPi images boot fine from USB. The Manjaro image boot fine from USB. I have tried to copy their boot partitions but that didn't work. Would there be a better updated distro that I might be able to copy the boot partition from that may work? The below also didn't work.

user535733 avatar
cn flag
N0rbert avatar
zw flag
You can try to adapt [this Ubuntu MATE]( method for your case .
ng flag
I was able to image a SSD using Raspberry PI Imager to Raspberry PI OS (32-bit), boot to expand the HD, then use dd to copy a working SD card root partition to the SSD , updated /etc/fstab and it booted just fine.

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