hardMultiple ChoiceObjective-mapped
XK0-006 Practice Question: A server has a volume group 'vg_data' with a…
A server has a volume group 'vg_data' with a single logical volume 'lv_data' of 100GB mounted at /data. The filesystem on lv_data is XFS. The administrator needs to extend it to 150GB. A new 60GB disk /dev/sdc has been added and partitioned as LVM. The administrator runs `pvcreate /dev/sdc1`, then `vgextend vg_data /dev/sdc1`, then `lvextend -L +50G /dev/vg_data/lv_data`. The administrator runs `df -h /data` and sees that the filesystem still shows 100GB. Which command should be run next?
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
✓
xfs_growfs /data
For XFS filesystems, after extending the logical volume, the filesystem must be grown using xfs_growfs with the mount point as argument. resize2fs is for ext2/3/4. Option C checks the filesystem, but it's not needed. Option D would shrink, which is incorrect.
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 -L -50G /dev/vg_data/lv_data
Why it's wrong here
This would shrink the LV, opposite of what is needed.
- ✗
fsck /dev/vg_data/lv_data
Why it's wrong here
fsck checks filesystem integrity, does not extend it.
- ✓
xfs_growfs /data
Why this is correct
xfs_growfs grows an XFS filesystem to fill the available space.
- ✗
resize2fs /dev/vg_data/lv_data
Why it's wrong here
resize2fs is used for ext2/3/4, not XFS.
Go deeper
Related to this question
Learn chapter
Navigating the Filesystem
Key term
lvextend
lvextend is a Linux command used to increase the size of an existing Logical Volume in LVM (Logical Volume Manager) without disrupting the data or the system.
Key term
LVM
LVM (Logical Volume Manager) is a storage management system that allows you to create, resize, and manage disk partitions flexibly without needing to repartition the physical disk.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This XK0-006 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the XK0-006 exam.