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.
Which two are required to create a logical volume? (Choose two.)
Physical volume
Correct. A PV is needed as storage for the VG.
Mount point
Why wrong: Incorrect. Mount point is used later when mounting the LV.
Filesystem
Why wrong: Incorrect. Filesystem is created after LV creation.
Partition
Why wrong: Incorrect. A partition is not strictly required; a whole disk can be used as PV.
Volume group
Correct. An LV must be created from a VG.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Physical volume
A physical volume (PV) is required because it is the underlying storage device (e.g., a disk or partition) that LVM uses as a building block. Without a PV, there is no raw storage to allocate to a volume group. The volume group (VG) is then created from one or more PVs, and logical volumes (LVs) are carved from the VG. Both are mandatory steps in the LVM workflow.
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.
Physical volume
Why this is correct
Correct. A PV is needed as storage for the VG.
Related concept
Read the scenario before looking for a memorised answer.
Mount point
Why it's wrong here
Incorrect. Mount point is used later when mounting the LV.
Filesystem
Why it's wrong here
Incorrect. Filesystem is created after LV creation.
Partition
Why it's wrong here
Incorrect. A partition is not strictly required; a whole disk can be used as PV.
Volume group
Why this is correct
Correct. An LV must be created from a VG.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates confuse the steps of creating a logical volume with the steps of making it usable (mount point and filesystem), leading them to select options B or C as required prerequisites.
Detailed technical explanation
Under the hood, LVM uses the Device Mapper kernel subsystem to map logical extents to physical extents on PVs. The `pvcreate` command writes LVM metadata (e.g., label, UUID) to the start of the device, and `vgcreate` aggregates PVs into a pool. In a real-world scenario, you might use `pvcreate /dev/sdb` on a raw disk without partitioning, then `vgcreate myvg /dev/sdb` and `lvcreate -L 10G -n mylv myvg` — no partition or filesystem is involved until later.
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
Configure local storage — This question tests Configure local storage — Read the scenario before looking for a memorised answer..
The correct answer is: Physical volume — A physical volume (PV) is required because it is the underlying storage device (e.g., a disk or partition) that LVM uses as a building block. Without a PV, there is no raw storage to allocate to a volume group. The volume group (VG) is then created from one or more PVs, and logical volumes (LVs) are carved from the VG. Both are mandatory steps in the LVM workflow.
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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