What does data scrubbing involve in storage management?

• A. Encrypts data across storage media.
• B. Duplicates data to an offsite location.
• C. Regularly checking data integrity and correcting detected corruption across storage media.
• D. Deletes corrupted data without repair.

Answer: (C)

Data scrubbing is the practice of proactively verifying data integrity across storage media and repairing any detected corruption. It works by periodically reading stored data and using integrity metadata—like checksums or parity—to detect errors. If a mismatch is found, the system uses redundancy (such as mirrored copies, parity, or error-correcting codes) to reconstruct the correct data and rewrite it, preventing silent, accumulating corruption. This keeps large storage pools reliable and reduces the risk of data loss over time. It’s not about encrypting data, nor simply backing up elsewhere, and it isn’t about deleting corrupted data; it’s about finding and fixing corruption to maintain correctness.