I just installed archlinux in my Goflex Home, it worked like a breeze and honestly I am having a lot of fun

I just wonder how does it work in practice with the power off. Usually, to properly sync all disks and gracefully shut down a linux OS you should use a "shutdown / halt" command. Nowadays I always do that since I am still working a lot on the terminal.
Once the box is closed and used as a media server and time capsule I will not ssh the goflex just to shut it down. Is it safe to use the power button? Isn't it a risk for the integrity of the file system?
Thanks guys
/Javier