tldr/pages/linux/mdadm.md

mdadm

RAID management utility

• create array

mdadm --create {{/path/to/raid_device_file}} --level {{ raid level }} --raid-devices {{ number of disks}} {{/path/to/disk_device_file}}

• stop array

mdadm -S {{/path/to/raid_device_file}}

• mark disk as failed

mdadm {{/path/to/raid_device_file}} -f {{/path/to/disk_device_file}}

• remove disk

mdadm {{/path/to/raid_device_file}} -r {{/path/to/disk_device_file}}

• add disk to array

mdadm {{/path/to/raid_device_file}} -a {{/path/to/disk_device_file}}

• show RAID info

mdadm -D {{/path/to/raid_device_file}}