- A
lvreduce
Why wrong: Incorrect. lvreduce reduces the size of an LV, not create a backup.
- B
lvchange
Why wrong: Incorrect. lvchange modifies LV attributes, not create snapshots.
- C
lvextend
Why wrong: Incorrect. lvextend increases LV size.
- D
lvcreate -s
Correct. lvcreate with -s creates a snapshot of the LV.
- E
pvmove
Why wrong: Incorrect. pvmove relocates physical extents.
Question 105 of 537
LVM Snapshot Backup: Using lvcreate -s
This EX200 practice question tests your understanding of configure local storage. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 system administrator needs to create a point-in-time backup of a logical volume 'lv_home' that is currently mounted. Which LVM feature should be used?
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
✓
lvcreate -s
Option D is correct because the 'lvcreate -s' command creates a snapshot of a logical volume, which provides a point-in-time backup without unmounting the volume. Snapshots are a native LVM feature that allow consistent backups of mounted filesystems by capturing the state of the logical volume at the moment the snapshot is created.
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.
- ✗
lvreduce
Why it's wrong here
Incorrect. lvreduce reduces the size of an LV, not create a backup.
- ✗
lvchange
Why it's wrong here
Incorrect. lvchange modifies LV attributes, not create snapshots.
- ✗
lvextend
Why it's wrong here
Incorrect. lvextend increases LV size.
- ✓
lvcreate -s
Why this is correct
Correct. lvcreate with -s creates a snapshot of the LV.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
pvmove
Why it's wrong here
Incorrect. pvmove relocates physical extents.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse 'lvcreate -s' with other LVM commands like 'lvreduce' or 'lvextend', mistakenly thinking those can create backups, or they may assume that a mounted volume must be unmounted before any backup operation, which is not required with LVM snapshots.
Detailed technical explanation
How to think about this question
LVM snapshots use a copy-on-write (CoW) mechanism: when data on the original logical volume is modified after the snapshot is created, the original data is copied to the snapshot before the write occurs, preserving the point-in-time state. This allows the snapshot to remain consistent even while the filesystem is actively being written to, making it ideal for backing up mounted volumes like lv_home. In real-world scenarios, snapshots are often used to create consistent backups of databases or critical user data without downtime.
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 EX200 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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Configure local storage — study guide chapter
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FAQ
Questions learners often ask
What does this EX200 question test?
Configure local storage — This question tests Configure local storage — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: lvcreate -s — Option D is correct because the 'lvcreate -s' command creates a snapshot of a logical volume, which provides a point-in-time backup without unmounting the volume. Snapshots are a native LVM feature that allow consistent backups of mounted filesystems by capturing the state of the logical volume at the moment the snapshot is created.
What should I do if I get this EX200 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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