mdadm

RAID management utility. More information: https://manned.org/mdadm.

• Create array:
  sudo mdadm --create {{/dev/md/MyRAID}} --level {{raid_level}} --raid-devices {{number_of_disks}} {{/dev/sdXN}}
• Stop array:
  sudo mdadm --stop {{/dev/md0}}
• Mark disk as failed:
  sudo mdadm --fail {{/dev/md0}} {{/dev/sdXN}}
• Remove disk:
  sudo mdadm --remove {{/dev/md0}} {{/dev/sdXN}}
• Add disk to array:
  sudo mdadm --assemble {{/dev/md0}} {{/dev/sdXN}}
• Show RAID info:
  sudo mdadm --detail {{/dev/md0}}
• Reset disk by deleting RAID metadata:
  sudo mdadm --zero-superblock {{/dev/sdXN}}