LFCS Storage Management Practice Question
An administrator created an LVM snapshot of a logical volume to perform a backup. During the backup, the snapshot runs out of space. What will happen to the original logical volume?
⚠ Common exam trap
Many exam-takers assume the original volume will be affected (e.g., become read-only or extended) when the snapshot runs out of space, but LVM isolates the original volume from snapshot failures, so only the snapshot is invalidated.
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
✓
The snapshot becomes invalid and must be recreated.
When an LVM snapshot runs out of space, it becomes invalid and cannot track changes made to the original logical volume during the backup. The snapshot is automatically dropped by the device-mapper, and any attempt to mount or read it will fail. The original logical volume remains fully functional and unaffected, but the snapshot must be recreated to perform a new backup.
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 original volume becomes read-only.
Why it's wrong here
The original volume remains read-write.
- ✗
The backup completes successfully but data may be inconsistent.
Why it's wrong here
The backup will likely fail because writes to the snapshot cannot be stored.
- ✓
The snapshot becomes invalid and must be recreated.
Why this is correct
Snapshots use copy-on-write; when full, they are dropped and become inaccessible. Original volume unaffected.
- ✗
The original volume is automatically extended.
Why it's wrong here
No auto-extension occurs; the snapshot is dropped.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This LFCS practice question is part of Courseiva's free Linux Foundation certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the LFCS exam.