LPIC-1 System Architecture Practice Question
A technician is troubleshooting a system that fails to boot with the error 'Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)'. What is the most likely cause?
⚠ Common exam trap
Watch out — candidates often confuse a root filesystem corruption error with a missing storage driver error, because both can prevent booting, but the specific 'unknown-block(0,0)' message uniquely points to the kernel's inability to identify the block device, not a filesystem issue.
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 kernel lacks the necessary driver for the storage controller.
The error 'VFS: Unable to mount root fs on unknown-block(0,0)' indicates that the kernel cannot locate or access the root filesystem. This typically occurs because the kernel lacks the necessary driver (module) for the storage controller (e.g., SATA, SCSI, NVMe) that the root device is connected to, so it cannot read the partition table or mount the root filesystem.
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 init binary is missing or corrupted.
Why it's wrong here
This error occurs after init is started.
- ✗
The root filesystem is corrupted and needs fsck.
Why it's wrong here
Corruption would produce a different error, not 'unknown-block'.
- ✓
The kernel lacks the necessary driver for the storage controller.
Why this is correct
Kernel cannot access the root device due to missing storage driver.
- ✗
The boot loader is not installed correctly.
Why it's wrong here
MBR issues appear before kernel loading.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This LPIC-1 practice question is part of Courseiva's free LPI 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 LPIC-1 exam.