220-802 Question #511: Real Exam Question with Answer & Explanation

The correct answer is C: The user will lose all non-backed up data.. RAID 0 uses disk striping, which splits data across all drives in the array to improve read/write performance - but provides zero fault tolerance and zero redundancy. When data is striped, each file is distributed in blocks across every drive. If any single drive fails, all the d

Question

A technician discovers that a hard drive has died in a RAID 0 configuration. Which of the following would be the outcome of this situation?

Options

AThe user will need to replace the PC.
BThe technician will need to back up and replace the drive.
CThe user will lose all non-backed up data.
DThe technician will need to replace the drive and rebuild the array

Explanation

RAID 0 uses disk striping, which splits data across all drives in the array to improve read/write performance - but provides zero fault tolerance and zero redundancy. When data is striped, each file is distributed in blocks across every drive. If any single drive fails, all the data that was spread across the array becomes incomplete and unreadable. The entire array is effectively destroyed. The user will lose all data that was not backed up externally (C). The PC itself does not need replacing (A). Simply replacing the drive (B) or rebuilding the array (D) cannot recover lost data in RAID 0 - there is no parity or mirroring to rebuild from. This is why RAID 0 should never be used without separate backups.

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