Which attribute type indicates imminent hardware failure for SMART?

• A. Old-Age attribute type indicates wear over time.
• B. Read error attribute implies data corruption.
• C. Pre-Fail attribute type is unrelated to hardware failure.
• D. Pre-Fail attribute type means imminent hardware failure.

Answer: (D)

SMART attributes are grouped into two types: Pre-Fail and Old Age. Pre-Fail attributes are the ones monitored to detect an impending hardware failure; when their values drop toward the configured thresholds, they serve as early warning signs that the drive may fail soon. Old Age attributes, on the other hand, reflect wear and aging over time and don’t by themselves indicate an imminent failure. So the attribute type that signals an imminent hardware failure is the Pre-Fail category. The other options describe related concepts (wear over time or data integrity) but don’t capture how SMART categorizes imminent failure indicators.