LFCS Storage Management Practice Question
A server’s root filesystem on LVM is nearly full. The administrator has added a new 20GB disk and created a physical volume on it. They added the PV to the volume group containing root, then extended the root logical volume by 10GB. Next, they ran resize2fs on the mounted root filesystem. After the resize, the server continues to function. However, upon reboot, the system fails to boot and enters emergency mode. What is the most likely cause?
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
✓
The initramfs needs to be regenerated to include the new disk.
After adding a new physical volume to an LVM volume group containing the root filesystem, the initramfs must be regenerated to include the necessary LVM tools and device information so that the root volume can be activated early in the boot process. Without rebuilding the initramfs, the system may fail to mount the root filesystem after reboot. Option A is irrelevant because the kernel is unchanged. Option B is incorrect because the /etc/fstab entry, typically using UUID or logical volume path, remains valid. Option C is unlikely because resize2fs succeeded and the filesystem is consistent after running it immediately.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The GRUB configuration is missing the new kernel.
Why it's wrong here
GRUB configuration is not affected by adding a disk.
- ✗
The /etc/fstab entry for root is incorrect.
Why it's wrong here
fstab entry was valid before and after resize.
- ✗
The filesystem was not resized correctly.
Why it's wrong here
resize2fs completed without error, so filesystem is fine.
- ✓
The initramfs needs to be regenerated to include the new disk.
Why this is correct
Correct: Adding a PV may require initramfs rebuild to ensure LVM tools are present.
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Written by Johnson Ajibi, MSc IT Security
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