Welcome to your interview.
The question is on your right: Cluster Disk Usage Monitoring. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
Write a script to monitor disk usage across a cluster of servers and send an alert if any partition exceeds a specific threshold.