If SMART logs are empty, which statement could be true?

• A. Device doesn't support SMART or RAID hides direct access.
• B. The drive is healthy with no SMART data.
• C. SMART has been disabled by user settings.
• D. The system is in a maintain mode and hides logs.

Answer: (A)

When SMART logs are empty, you can’t assume the drive is healthy; the most likely explanation is that SMART data isn’t being exposed to the system. This happens when the device doesn’t support SMART or when a RAID controller or similar layer is filtering or hiding SMART information from the OS. In those cases, no SMART data appears even if the drive is fine.

Consider verifying by checking SMART support at the device level with a SMART query tool, and then confirm whether a RAID controller is in use and if it passes SMART data through to the host. If SMART is supposed to be exposed but isn’t, inspect controller/firmware settings to see if SMART exposure has been disabled. Other scenarios, like SMART being explicitly turned off by settings or the system being in a mode that hides logs, are possible but rely on specific configurations and are less generally indicated just by an empty SMART log.