Which command shows the full SMART attributes?

• A. sudo smartctl -A /dev/sdX
• B. sudo smartctl -H /dev/sdX
• C. sudo smartctl -i /dev/sdX
• D. sudo smartctl -l selftest /dev/sdX

Answer: (A)

SMART attributes are the detailed per-attribute health indicators reported by the disk. The full set is shown as a table that lists each attribute with its current value, worst value, threshold, and the raw value, giving you a complete view of the drive’s health indicators. The command that outputs this complete attribute table is the one using the -A option, applied to the device, typically with sudo. So you’d run something like sudo smartctl -A /dev/sdX.

Other commands pull different information: -H shows only the overall health status, -i provides basic device information, and -l selftest shows the self-test log.