I am copying yocto build linux image to sd-card from Ubuntu 14.04 system. The command is:
$ sudo dd bs=4M if=filename.rpi-sdimg of=/dev/sdX conv=fsync
What does mean here of
I red from here
Synchronize output data and metadata just before finishing. This forces a physical write of output data and metadata.
But I did not understand by this line. What is mean by synchronization, metadata and what will be the effect if I do not include it in the command.
How is it different from fdatasync which only synchronizes output data.