- A
lvcreate -L 1.2T -n data myvg mkfs.ext4 /dev/myvg/data echo '/dev/myvg/data /data ext4 defaults 0 0' >> /etc/fstab mount -a
Why wrong: Incorrect: Option A uses ext4 and the same exact size 1.2T, but XFS is the preferred filesystem on RHEL. While ext4 can work, the question does not specify filesystem, and the default XFS is more appropriate. Additionally, the fstab device path /dev/myvg/data is correct, but overall option C is the best practice.
- B
lvcreate -l 100%FREE -n data myvg mkfs.xfs /dev/myvg/data echo '/dev/mapper/myvg-data /data xfs defaults 0 0' >> /etc/fstab mount -a
Why wrong: Incorrect: Option B uses -l 100%FREE, which creates a volume consuming all free space, not the required 1.2 TiB. It also uses /dev/mapper/myvg-data for fstab, which is non-standard for LVM2; /dev/myvg/data is preferred.
- C
lvcreate -L 1.2T -n data myvg mkfs.xfs /dev/myvg/data echo '/dev/myvg/data /data xfs defaults 0 0' >> /etc/fstab mount -a
Correct: Option C creates an exact 1.2 TiB logical volume with -L 1.2T, formats with XFS, and uses a correct fstab entry. The mount -a command tests the mount.
- D
lvcreate -L 1200G -n data myvg mkfs.ext4 /dev/myvg/data echo '/dev/myvg/data /data ext4 defaults 0 0' >> /etc/fstab mount -a
Why wrong: Incorrect: Option D uses 1200G, which is approximately 1.17 TiB, not the required 1.2 TiB. Although it formats with ext4 and adds a valid fstab entry, the size is insufficient.
LVM Size Units: Creating Large Logical Volumes
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. A key principle to apply: lvcreate -L. 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.
Refer to the exhibit. An administrator needs to create a 1.2 TiB logical volume named 'data' in volume group 'myvg' and mount it persistently at /data. Which sequence of commands 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 -L 1.2T -n data myvg mkfs.xfs /dev/myvg/data echo '/dev/myvg/data /data xfs defaults 0 0' >> /etc/fstab mount -a
Option C is correct because it creates a logical volume of exactly 1.2 TiB using the valid -L 1.2T size specification. LVM's -L option accepts floating-point values with suffixes like T for TiB. The volume is formatted with XFS (default for RHEL 8+), a correct fstab entry is added with /dev/myvg/data, and mount -a mounts it persistently. Option D uses 1200G, which yields approximately 1.17 TiB, not the required 1.2 TiB.
Key principle: lvcreate -L
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
lvcreate -L 1.2T -n data myvg mkfs.ext4 /dev/myvg/data echo '/dev/myvg/data /data ext4 defaults 0 0' >> /etc/fstab mount -a
Why it's wrong here
Incorrect: Option A uses ext4 and the same exact size 1.2T, but XFS is the preferred filesystem on RHEL. While ext4 can work, the question does not specify filesystem, and the default XFS is more appropriate. Additionally, the fstab device path /dev/myvg/data is correct, but overall option C is the best practice.
- ✗
lvcreate -l 100%FREE -n data myvg mkfs.xfs /dev/myvg/data echo '/dev/mapper/myvg-data /data xfs defaults 0 0' >> /etc/fstab mount -a
Why it's wrong here
Incorrect: Option B uses -l 100%FREE, which creates a volume consuming all free space, not the required 1.2 TiB. It also uses /dev/mapper/myvg-data for fstab, which is non-standard for LVM2; /dev/myvg/data is preferred.
- ✓
lvcreate -L 1.2T -n data myvg mkfs.xfs /dev/myvg/data echo '/dev/myvg/data /data xfs defaults 0 0' >> /etc/fstab mount -a
Why this is correct
Correct: Option C creates an exact 1.2 TiB logical volume with -L 1.2T, formats with XFS, and uses a correct fstab entry. The mount -a command tests the mount.
Related concept
lvcreate -L
- ✗
lvcreate -L 1200G -n data myvg mkfs.ext4 /dev/myvg/data echo '/dev/myvg/data /data ext4 defaults 0 0' >> /etc/fstab mount -a
Why it's wrong here
Incorrect: Option D uses 1200G, which is approximately 1.17 TiB, not the required 1.2 TiB. Although it formats with ext4 and adds a valid fstab entry, the size is insufficient.
Common exam traps
Common exam trap: answer the scenario, not the keyword
A common pitfall on the RHCSA exam is assuming that -L does not accept fractional TiB values. In fact, lvcreate supports floating-point sizes (e.g., 1.2T). Candidates may incorrectly use an approximation like 1200G instead of the exact 1.2T.
Detailed technical explanation
How to think about this question
LVM size suffixes are case-sensitive: 'G' for gibibytes, 'T' for tebibytes, but fractional values like 1.2T are not parsed correctly by lvcreate; instead, use 1200G or 1.5T (integer only). The device path /dev/myvg/data is a symbolic link to the actual device mapper path /dev/mapper/myvg-data, and both work in fstab, but /dev/myvg/data is simpler and more common. The mount -a command reads /etc/fstab and mounts all entries not already mounted, ensuring the new entry is activated.
KKey Concepts to Remember
- lvcreate -L
- mkfs.xfs
- /dev/myvg/data
- mount -a
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
lvcreate -L
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. lvcreate -L 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.
Review lvcreate -L, then practise related EX200 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this EX200 question test?
Configure local storage — This question tests Configure local storage — lvcreate -L.
What is the correct answer to this question?
The correct answer is: lvcreate -L 1.2T -n data myvg mkfs.xfs /dev/myvg/data echo '/dev/myvg/data /data xfs defaults 0 0' >> /etc/fstab mount -a — Option C is correct because it creates a logical volume of exactly 1.2 TiB using the valid -L 1.2T size specification. LVM's -L option accepts floating-point values with suffixes like T for TiB. The volume is formatted with XFS (default for RHEL 8+), a correct fstab entry is added with /dev/myvg/data, and mount -a mounts it persistently. Option D uses 1200G, which yields approximately 1.17 TiB, not the required 1.2 TiB.
What should I do if I get this EX200 question wrong?
Review lvcreate -L, then practise related EX200 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
lvcreate -L
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Last reviewed: Jul 4, 2026
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