220-802 Question #610: Real Exam Question with Answer & Explanation

The correct answer is D: Faulty hard drive. A 'RAID degraded' message at boot indicates that one or more drives in the RAID array have failed, reducing the array below its full redundancy level.

Question

A technician is diagnosing a computer receiving the following message upon boot: "RAID degraded." Which of the following is MOST likely the cause of such an issue?

Options

AFaulty RAM
BFaulty RAID battery
CFaulty power supply
DFaulty hard drive

Explanation

A 'RAID degraded' message at boot indicates that one or more drives in the RAID array have failed, reducing the array below its full redundancy level.

Common mistakes.

A. Faulty RAM produces memory errors, blue screens, or random crashes but does not affect RAID controller status or generate a RAID-specific boot message.
B. A faulty RAID battery backup unit (BBU) affects the write-back cache and would generate a cache or BBU warning, not a 'RAID degraded' message.
C. A faulty power supply may cause random shutdowns or power instability but would not specifically generate a 'RAID degraded' status message from the controller.

Concept tested. RAID array degraded state caused by drive failure

Reference. https://learn.microsoft.com/en-us/windows-server/storage/storage-spaces/storage-spaces-fault-tolerance

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