XK0-006 Troubleshooting Practice Question
A technician wants to check the disk I/O statistics, focusing on the average I/O wait time and utilization percentage. Which command provides this information?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
iostat -x
iostat displays disk I/O statistics including %util (utilization) and await (average I/O wait time).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
sar -b
Why it's wrong here
sar -b shows I/O stats but not as detailed.
- ✗
vmstat -d
Why it's wrong here
vmstat -d shows disk stats but not %util or await.
- ✗
free -h
Why it's wrong here
free shows memory, not disk I/O.
- ✓
iostat -x
Why this is correct
Correct: iostat -x shows extended stats including %util and await.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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