Since few hours all of my websites have error related to the database connection. Sometimes, it works, sometimes not with this error.. I tried to restart mysql but doesn't work I checked the disk usage by using df -h and i have Code: udev 7,9G 0 7,9G 0% /dev tmpfs 1,6G 179M 1,4G 12% /run /dev/md3 20G 19G 0 100% / tmpfs 7,9G 0 7,9G 0% /dev/shm tmpfs 5,0M 4,0K 5,0M 1% /run/lock tmpfs 7,9G 0 7,9G 0% /sys/fs/cgroup /dev/md2 487M 30M 429M 7% /boot /dev/md4 1,8T 68M 1,7T 1% /home I think, there is something wrong with md3 ... I don't understand, can you explain me, and how can i fix this please ? Thanks !