Systemd journal says this:systemd-journald[224]: File /var/log/journal/8e87634f48604305aef4d5079daf383f/system.journal corrupted or uncleanly shut down, renaming and replacing.At every reboot dmesg report this problem. I added to /etc/mkinitcpio.conf the hook shutdown but it still apears.
Problem with journal
systemd journald