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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.