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}}`