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Maintenance & Recovery

Check RAID Health

Read the RAID status and recognise a degraded array before another drive fails.

Guide difficulty⭐⭐⭐⭐⭐ Beginner Friendly
Estimated time⏱️ Around 20–40 minutesEstimated for a first-time user.

  1. Read the quick status

    cat /proc/mdstat

  2. Read the detailed status

    sudo mdadm --detail /dev/md0

  3. Look for the healthy pattern

    The four-drive reference array should show all expected members active. A missing member or degraded state requires attention.

  4. Check drive health separately

    DRAFT CHECKPOINT: add the exact tested SMART commands and USB/SATA compatibility notes.

IMAGE PLACEHOLDERHealthy mdadm detail output with State, Active Devices and member list annotated.
Required image: Healthy mdadm detail output with State, Active Devices and member list annotated.
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