Notes about the
dd command in Linux.
This command was slow, no progress was displayed and I had no idea if the command was working succesfully or not. Not possible to kill the process once started so I needed to shutdown to stop the process.
This was from the Funtoo Install Guide. It worked reliably with progress indicator but again very slow, taking a couple of hours to complete.
From the Fedora Docs this command worked reliably with progress indicator and quickly too.
Found a comment from StackExchange about combining small block size with
oflag=sync reducing performance and that not using
oflag=direct can lead to issues too. I think next time I might try with
oflag=direct,sync and an
8M block size, lowering that if the result is unsucessful.