I have a Raspberry Pi, with the lite version of Raspberry Pi OS, OpenMediaVault, and Plex installed. The drive is below 70% health, so wanted to replace it with a new drive. I tried cloning it with CloneZilla, but booting the new disk on the RPI, says GPT: No bootable partitions.
I copied the disk sector by sector, so I would assume, it's a perfect copy.
EDIT: So this is what happened. First boot, it was just in an endless loop of not finding a bootable partition. Second, was when I was writing the first message here, but after a long endless loop of not finding a bootable partition, the system was suddenly booted up correctly. Third boot, there were a few messages on the screen, then a total blank screen for a long time, but the SSD is flashing constantly.