This CKA practice question tests your understanding of storage. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A pod is configured to use a PersistentVolumeClaim (PVC). The PVC is bound to a PersistentVolume (PV) that uses a cloud disk. The pod fails to start with the error 'MountVolume.SetUp failed for volume ... mount failed: exit status 32'. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The underlying storage device is still attached to a previous node
The error 'MountVolume.SetUp failed for volume ... mount failed: exit status 32' typically indicates a filesystem-level mount failure. When a cloud disk (e.g., AWS EBS, GCE PD) is still attached to a previous node, the new node cannot mount it because the disk is already in use or has a stale filesystem lock. Kubernetes requires the disk to be detached from the old node before it can be attached and mounted on the new node.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The PV's access mode is ReadOnlyMany
Why it's wrong here
ReadOnlyMany would still allow mounting, but with read-only access.
✗
The PV is not created
Why it's wrong here
The error indicates the PV exists but mount fails.
✗
The PVC is unbound
Why it's wrong here
If unbound, the pod would fail earlier with a different error.
✓
The underlying storage device is still attached to a previous node
Why this is correct
Cloud disks are often attached to one node at a time; detach/re-attach delays cause mount failures.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume the error is due to a missing PV or unbound PVC, but the specific 'exit status 32' points to a low-level mount failure, typically caused by the disk still being attached to a previous node.
Detailed technical explanation
How to think about this question
Under the hood, cloud disks like AWS EBS use device names (e.g., /dev/xvdf) and filesystem UUIDs. When a node crashes or is terminated, the disk may remain attached to the old node in a 'attached' state in the cloud provider's API. Kubernetes' Attach/Detach controller (or kubelet's internal logic) must first detach the volume from the old node, which can take time or fail if the old node is unreachable. The 'exit status 32' is a generic mount error from the mount syscall, often caused by the device being busy or already mounted elsewhere.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the CKA exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CKA question in full detail.
Storage — This question tests Storage — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The underlying storage device is still attached to a previous node — The error 'MountVolume.SetUp failed for volume ... mount failed: exit status 32' typically indicates a filesystem-level mount failure. When a cloud disk (e.g., AWS EBS, GCE PD) is still attached to a previous node, the new node cannot mount it because the disk is already in use or has a stale filesystem lock. Kubernetes requires the disk to be detached from the old node before it can be attached and mounted on the new node.
What should I do if I get this CKA question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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