I bought a new external hard disk drive (seagate 1tb backup plus). After using it for some time, whenever i'm plugging it out, the cpu usage gets too much high. Using system activity i saw that the culprit is the rsyslogd (using ~35%) and kworker (using ~ 25%) of the cpu usage. It happened 3 times and the machine had shut down due to overheating. What are these processes and why are they acting like this? this happens only when i plug the device out and not when i unmount it. What's the cure for it?