SK0-005 troubleshooting Practice Question
Following a firmware update on a server's RAID controller, the server fails to boot and reports "No boot device found." The RAID array status shows healthy in the controller BIOS. Which THREE of the following actions should the administrator take to resolve the issue? (Choose three.)
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
✓
Roll back the RAID controller firmware
Options A, B, and E are correct. Rolling back firmware can undo a bad update. Verifying boot order ensures the correct device is first. Resetting the controller configuration may clear incompatible settings from the update. Rebuilding the array is unnecessary as it is healthy. Installing OS drivers is impossible without a booted OS.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Roll back the RAID controller firmware
Why this is correct
If the new firmware caused the boot issue, rolling back to the previous version can restore functionality.
- ✗
Rebuild the RAID array from backup
Why it's wrong here
The array is healthy; rebuilding would erase data and is unnecessary when the logical volume is intact.
- ✓
Reset the RAID controller configuration to defaults
Why this is correct
Resetting to factory defaults can clear any misconfigurations introduced by the firmware update while preserving the logical drive.
- ✓
Verify the boot order in the system BIOS
Why this is correct
The firmware update may have altered the boot priority; ensuring the RAID array is first can resolve a 'no boot device' error.
- ✗
Install the latest drivers for the RAID controller in the OS
Why it's wrong here
Driver installation requires booting into the OS; since the server cannot boot, this step cannot be performed.
Visual reference
Quick reference
RAID Level Comparison
| RAID Level | Min Disks | Fault Tolerance | Read | Write | Usable Capacity |
|---|---|---|---|---|---|
| RAID 0 | 2 | None | Excellent | Excellent | 100% |
| RAID 1 | 2 | 1 disk | Good | Moderate | 50% |
| RAID 5 | 3 | 1 disk | Good | Moderate | 67–94% |
| RAID 6 | 4 | 2 disks | Good | Lower | 50–88% |
| RAID 10 | 4 | 1 disk per mirror | Excellent | Good | 50% |
RAID is not a backup strategy — it protects against disk failure but not against accidental deletion, ransomware, or site-level events.
Go deeper
Related to this question
Learn chapter
Operating System Installation and Configuration
Key term
Update
An update is a piece of software released to fix problems, add features, or improve security in an existing program or system.
Key term
BIOS
BIOS (Basic Input/Output System) is the low-level firmware stored on a motherboard chip that initializes and tests hardware components before loading the operating system.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed July 2026 · checked against the official CompTIA exam blueprint
This SK0-005 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 SK0-005 exam.