Which command runs a long/extended SMART test?

Which command runs a long/extended SMART test?

• A. sudo smartctl -t full /dev/sdX
• B. sudo smartctl -t extended /dev/sdX
• C. sudo smartctl -t endurance /dev/sdX
• D. sudo smartctl -t long /dev/sdX

Answer: (D)

The key idea is that a long (extended) SMART self-test is the thorough run that checks many sectors and goes beyond a quick check. To start it, you use the long test type with smartctl. The command is sudo smartctl -t long /dev/sdX. This initiates a comprehensive self-test that can take hours, depending on the drive size and performance. It runs asynchronously, and you can check progress or results later with smartctl -a /dev/sdX or smartctl -l selftest. Some drives or tools may refer to an extended or full test, but the standard, widely supported form is long, which is why that option is the best choice here.

The key idea is that a long (extended) SMART self-test is the thorough run that checks many sectors and goes beyond a quick check. To start it, you use the long test type with smartctl. The command is sudo smartctl -t long /dev/sdX. This initiates a comprehensive self-test that can take hours, depending on the drive size and performance. It runs asynchronously, and you can check progress or results later with smartctl -a /dev/sdX or smartctl -l selftest. Some drives or tools may refer to an extended or full test, but the standard, widely supported form is long, which is why that option is the best choice here.