Which statement best describes the primary purpose of reading SMART logs?

• A. To detect failing drives early, diagnose read/write errors, and decide when to replace disks
• B. To optimize filesystem performance
• C. To manage user permissions
• D. To track network throughput

Answer: (A)

Reading SMART logs centers on monitoring storage device health and reliability. SMART collects attributes that reveal a drive’s approaching failure or degradation, such as increasing reallocated sectors or read/write errors. By reviewing these logs, you can detect problems early, diagnose issues with reads and writes, and decide when a disk should be replaced to prevent data loss and downtime. This proactive use of SMART data is exactly what the logs are designed for.

The other topics—optimizing filesystem performance, managing user permissions, and tracking network throughput—address different areas (systems performance, security/access, and network metrics, respectively) and do not focus on predicting hardware failures or guiding disk replacement decisions.