Creating a Logical Volume with lvcreate — Specifying Size
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. A key principle to apply: lvcreate. 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.
Exhibit
# lsblk /dev/sdb
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sdb 8:16 0 10G 0 disk
├─sdb1 8:17 0 2G 0 part
├─sdb2 8:18 0 2G 0 part
└─sdb3 8:19 0 6G 0 part
# vgdisplay
--- Volume group ---
VG Name vg_data
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 2
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 1
Max PV 0
Cur PV 1
Act PV 1
VG Size 5.99 GiB
PE Size 4.00 MiB
Total PE 1534
Alloc PE / Size 1024 / 4.00 GiB
Free PE / Size 510 / 1.99 GiB
VG UUID abc123-def456-ghi789
# lvdisplay
--- Logical volume ---
LV Path /dev/vg_data/lv_data
LV Name lv_data
VG Name vg_data
LV UUID lmn456-opq789-rst012
LV Write Access read/write
LV Creation host, time server1, 2023-01-01 00:00:00 +0000
LV Status available
# open 1
LV Size 4.00 GiB
Current LE 1024
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
Refer to the exhibit. A storage administrator needs to create a new filesystem of size 1.5 GiB on the available free space in volume group vg_data. Which command should be used?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
Exhibit
# lsblk /dev/sdb
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sdb 8:16 0 10G 0 disk
├─sdb1 8:17 0 2G 0 part
├─sdb2 8:18 0 2G 0 part
└─sdb3 8:19 0 6G 0 part
# vgdisplay
--- Volume group ---
VG Name vg_data
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 2
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 1
Max PV 0
Cur PV 1
Act PV 1
VG Size 5.99 GiB
PE Size 4.00 MiB
Total PE 1534
Alloc PE / Size 1024 / 4.00 GiB
Free PE / Size 510 / 1.99 GiB
VG UUID abc123-def456-ghi789
# lvdisplay
--- Logical volume ---
LV Path /dev/vg_data/lv_data
LV Name lv_data
VG Name vg_data
LV UUID lmn456-opq789-rst012
LV Write Access read/write
LV Creation host, time server1, 2023-01-01 00:00:00 +0000
LV Status available
# open 1
LV Size 4.00 GiB
Current LE 1024
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
A
lvcreate -L 1.5G -n lv_new vg_data
Correct. The -L option specifies the size (1.5G for 1.5 GiB) and -n specifies the name. This is the standard lvcreate syntax.
B
lvcreate -l 1.5G -n lv_new vg_data
Why wrong: Incorrect. The -l option is for specifying size in number of extents, not for a direct size. Using '1.5G' with -l is invalid.
C
lvcreate --size 1.5G --name lv_new vg_data
Why wrong: While lvcreate supports long options like --size and --name, the short options -L and -n are the standard syntax expected on the exam. Option C is syntactically correct but not the typical choice, so it is marked incorrect.
D
lvcreate -L 1500M -n lv_new vg_data
Why wrong: Incorrect. -L 1500M creates a volume of 1500 megabytes, which is about 1.465 GiB, not exactly 1.5 GiB. The -L option with G ensures gibibytes.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
lvcreate -L 1.5G -n lv_new vg_data
The volume group vg_data has 1.99 GiB free space. To create a 1.5 GiB logical volume, use lvcreate with -L 1.5G -n lv_new vg_data. The -L option specifies size, -n specifies name.
Key principle: lvcreate
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 1.5G -n lv_new vg_data
Why this is correct
Correct. The -L option specifies the size (1.5G for 1.5 GiB) and -n specifies the name. This is the standard lvcreate syntax.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
lvcreate
✗
lvcreate -l 1.5G -n lv_new vg_data
Why it's wrong here
Incorrect. The -l option is for specifying size in number of extents, not for a direct size. Using '1.5G' with -l is invalid.
✗
lvcreate --size 1.5G --name lv_new vg_data
Why it's wrong here
While lvcreate supports long options like --size and --name, the short options -L and -n are the standard syntax expected on the exam. Option C is syntactically correct but not the typical choice, so it is marked incorrect.
✗
lvcreate -L 1500M -n lv_new vg_data
Why it's wrong here
Incorrect. -L 1500M creates a volume of 1500 megabytes, which is about 1.465 GiB, not exactly 1.5 GiB. The -L option with G ensures gibibytes.
Common exam traps
Common exam trap: answer the scenario, not the keyword
While lvcreate supports long options like --size and --name, the short options -L and -n are standard and expected on the exam. Option C is syntactically correct but not the typical choice. Option D uses -L 1500M, which creates a 1.5 GB (1400 MiB) logical volume, not 1.5 GiB, so it is incorrect.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
lvcreate
Volume Group
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
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 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, then practise related EX200 questions on the same topic to reinforce the concept.
Create and configure file systems — This question tests Create and configure file systems — lvcreate.
What is the correct answer to this question?
The correct answer is: lvcreate -L 1.5G -n lv_new vg_data — The volume group vg_data has 1.99 GiB free space. To create a 1.5 GiB logical volume, use lvcreate with -L 1.5G -n lv_new vg_data. The -L option specifies size, -n specifies name.
What should I do if I get this EX200 question wrong?
Review lvcreate, then practise related EX200 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
What is the key concept behind this question?
lvcreate
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