This EX200 practice question tests your understanding of create and configure file systems. 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.
Which THREE commands are required to create a logical volume named lv_data of size 10G in volume group vg_data, format it as XFS, and mount it at /mnt/data?
vgcreate vg_data /dev/sde1
Why wrong: Incorrect: The volume group is assumed to already exist.
lvcreate -L 10G -n lv_data vg_data
Correct: Creates the logical volume.
mount /dev/vg_data/lv_data /mnt/data
Correct: Mounts the filesystem.
pvcreate /dev/sde1
Why wrong: Incorrect: The physical volume is assumed to already exist.
mkfs.xfs /dev/vg_data/lv_data
Correct: Creates the XFS filesystem.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
lvcreate -L 10G -n lv_data vg_data
Option B is correct because the `lvcreate -L 10G -n lv_data vg_data` command creates a logical volume named lv_data with a size of 10 GB within the volume group vg_data. This is the standard LVM command for creating logical volumes, where `-L` specifies the size and `-n` specifies the name.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
vgcreate vg_data /dev/sde1
Why it's wrong here
Incorrect: The volume group is assumed to already exist.
lvcreate -L 10G -n lv_data vg_data
Why this is correct
Correct: Creates the logical volume.
Related concept
Read the scenario before looking for a memorised answer.
mount /dev/vg_data/lv_data /mnt/data
Why this is correct
Correct: Mounts the filesystem.
Related concept
Read the scenario before looking for a memorised answer.
pvcreate /dev/sde1
Why it's wrong here
Incorrect: The physical volume is assumed to already exist.
mkfs.xfs /dev/vg_data/lv_data
Why this is correct
Correct: Creates the XFS filesystem.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often include `pvcreate` and `vgcreate` as required steps, but the question specifies that the volume group vg_data already exists, so only the LV creation, formatting, and mounting commands are needed.
Detailed technical explanation
Under the hood, LVM uses a layered architecture: physical volumes (PVs) are created on block devices (e.g., partitions or disks), volume groups (VGs) pool these PVs, and logical volumes (LVs) are carved from the VG. The `lvcreate` command allocates extents from the VG's free space, and the LV appears as a block device (e.g., /dev/vg_data/lv_data). In a real-world scenario, if the VG already exists (as implied by the question), you do not need to re-run `pvcreate` or `vgcreate`; the three commands B, C, and E are sufficient to create, format, and mount the LV.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
Create and configure file systems — This question tests Create and configure file systems — Read the scenario before looking for a memorised answer..
The correct answer is: lvcreate -L 10G -n lv_data vg_data — Option B is correct because the `lvcreate -L 10G -n lv_data vg_data` command creates a logical volume named lv_data with a size of 10 GB within the volume group vg_data. This is the standard LVM command for creating logical volumes, where `-L` specifies the size and `-n` specifies the name.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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