[arch-general] crazy mount process

I just finished to get my computer running again, I did a "pacman -Suf", and the glibc issue made my machine unusable.. Anyway I fixed that easily without reinstalling anything luckily, but now on reboot I see something very strange. There is a process running and keeping my machine busy: 357 root 20 0 10700 1004 856 R 99.7 0.0 7:01.50 /bin/mount -o relatime /dev/sda3 /media/usbhd-sda3 but /dev/sda3 is not even a real partition "/dev/sda3 240975 625137344 312448185 5 Extended I can't kill that process and don't understand where it comes from... any idea?