XK0-006 Troubleshooting Practice Question
A system administrator is investigating high disk I/O on a server. Which command can provide disk utilization statistics, including average wait time (await) and percentage of CPU time during which I/O requests were issued (%util)?
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 1
The `iostat` command reports disk I/O statistics including await and %util.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
free -h
Why it's wrong here
free shows memory usage, not disk I/O.
- ✗
sar -b 1 5
Why it's wrong here
sar -b reports I/O transfer statistics, but not await or %util.
- ✓
iostat -x 1
Why this is correct
iostat -x provides extended disk stats including await and %util.
- ✗
vmstat 1 5
Why it's wrong here
vmstat shows virtual memory and CPU stats, not disk await or %util.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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