hardMultiple ChoiceObjective-mapped
CISA Practice Question: Refer to the exhibit
Exhibit
Refer to the exhibit. ``` ERROR: 2019-10-22 14:23:45.678 Severity: CRITICAL Source: BackupServer1 Message: Backup job 'FinanceDB_Full' failed. Reason: Unable to mount virtual disk 'FinData-001' from storage array 'SAN01'. Suggested action: Check storage array connectivity and LUN masking. ```
Refer to the exhibit. An IT operator receives this error message from an automated backup job. What is the MOST likely cause of this failure?
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 LUN presenting the virtual disk is not zoned or masked to the backup server
The error indicates that the backup server cannot access the virtual disk, which is typically a LUN masking or zoning issue. Option A is plausible but the message specifically points to storage access; Option B is not indicated; Option C is possible but less direct.
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 FinanceDB database is corrupted
Why it's wrong here
The error is at the storage level, not database level.
- ✗
The network link between servers is down
Why it's wrong here
The error states 'storage array connectivity', which may include network but is more specific to SAN.
- ✗
The backup server's disk is full
Why it's wrong here
The error is about mounting a source volume, not storing the backup.
- ✓
The LUN presenting the virtual disk is not zoned or masked to the backup server
Why this is correct
The error 'Unable to mount virtual disk' strongly suggests a SAN zoning/LUN masking issue.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CISA practice question is part of Courseiva's free ISACA 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 CISA exam.