Difficulty: Easy
Correct Answer: regular backups
Explanation:
Introduction / Context:
Drives can fail suddenly, malware can encrypt files, and user mistakes happen. While maintenance improves performance and health, only a proper copy of your data elsewhere guarantees recovery. This question distinguishes preventative maintenance from true data protection.
Given Data / Assumptions:
Concept / Approach:
Backups create independent copies of data stored on different media or locations. Even if the original disk is lost or corrupted, the backup can be restored. Defragmentation and file-system checks improve performance and fix metadata errors, but they do not recover lost files after catastrophic failures.
Step-by-Step Solution:
Verification / Alternative check:
Perform a controlled restore test to verify integrity. Monitor backup logs and storage capacity alerts.
Why Other Options Are Wrong:
Defrag improves file placement; chkdsk/scandisk repair file systems; diagnostics may predict some failures. None guarantees data recovery after loss. Only backups provide that safety net.
Common Pitfalls:
Keeping the only backup connected (risk of theft/malware), never testing restores, or assuming RAID is a backup (it is not; it improves availability, not history).
Final Answer:
regular backups
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