DEVOPS - How to find out processes in 'D' state of uninterruptible sleep (High I/O Wait)

IN this blog I am going to write on how to find out processes state and specially when there is high I/O wait on the system. 

The key is to list down the process which are in 'D' or 'S' state (primarily 'D').

Run below command to list processes in 'D' state. Replace '^D' with '^S' to get list of processes in S State.

Once you get the process you can do action on it 

 for x in `seq 1 1 10`; do ps -eo state,pid,cmd | grep "^D"; echo "----"; sleep 5; done