Question 167 of 144
SK0-005 troubleshooting Practice Question
Exhibit
Event Type: Error Event Source: Disk Event ID: 11 Description: The driver detected a controller error on \Device\Harddisk0\DR0.
Refer to the exhibit. A technician is troubleshooting a server that is experiencing data corruption. 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
✓
Faulty RAID controller
Event ID 11 with a controller error typically indicates a faulty RAID controller or HBA, not a disk failure or cable issue.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Corrupted file system
Why it's wrong here
Incorrect. File system corruption would show event IDs like 55 or 26, not a controller error.
- ✗
Loose data cable
Why it's wrong here
Incorrect. While loose cables can cause errors, event ID 11 typically points to a controller-level issue rather than a cable connection.
- ✗
Failed hard disk drive
Why it's wrong here
Incorrect. A disk failure usually generates different event IDs (e.g., 7, 50), and the error points to the controller.
- ✓
Faulty RAID controller
Why this is correct
Correct. Event ID 11 with 'controller error' indicates a problem with the storage controller, which can cause data corruption.
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.
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Last reviewed: Jul 26, 2026
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