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}}