smartctl

Disk SMART health tool

low risk

interactive breakdown — edit the command and press Explain

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⚠ Risks & cautions

Long self-tests add I/O load — schedule off-peak.

What it does

Reads SMART data: health, error counts, wear and temperature.

Common flags

Flag	Meaning
`-a`	All SMART data
`-H`	Health summary
`-t`	Run a self-test

Examples

smartctl -H /dev/sdaHealth check · explain & risk-check →

smartctl -a /dev/nvme0Full report · explain & risk-check →

Related

Open the full explainer →More in Disks & Filesystems

Reference text is hand-written and may be incomplete — check man smartctl for your version. Test destructive commands on a non-production system first.