Lastly, if you reboot a critical server after a very long time, the fsck might mean you have to wait a very long time now for it to come back up. You can use tune2fs to avoid this, but it's a good idea to check it regularly I suppose. This is why you shouldn't be in a position where you are dependent on just 1 server and if that goes, your whole website is gone. You should have another one on standby.