tldr/pages/linux/mdadm.md

# 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}}`
Fix markdown lint warning for linux man pages 2015-10-22 08:00:05 +01:00			`# mdadm`
mdadm - RAID management utility 2014-08-04 04:31:06 +01:00
Formatted all pages according to guidelines. 2016-01-07 17:31:27 +00:00			`> RAID management utility.`
multiple pages: replace all die.net links (#5528) Most of the links were replaced by manned.org, except when there are more up-to-date sources (like `ifup`) or first-party sources (like `sftp`). 2021-04-16 15:42:14 +01:00			`> More information: <https://manned.org/mdadm>.`
mdadm - RAID management utility 2014-08-04 04:31:06 +01:00
Formatted all pages according to guidelines. 2016-01-07 17:31:27 +00:00			`- Create array:`
mdadm - RAID management utility 2014-08-04 04:31:06 +01:00
mdadm: add sudo, add --zero-superblock example (#8618) 2022-10-02 21:25:35 +01:00			`sudo mdadm --create {{/dev/md/MyRAID}} --level {{raid_level}} --raid-devices {{number_of_disks}} {{/dev/sdXN}}`
mdadm - RAID management utility 2014-08-04 04:31:06 +01:00
Formatted all pages according to guidelines. 2016-01-07 17:31:27 +00:00			`- Stop array:`
mdadm - RAID management utility 2014-08-04 04:31:06 +01:00
mdadm: add sudo, add --zero-superblock example (#8618) 2022-10-02 21:25:35 +01:00			`sudo mdadm --stop {{/dev/md0}}`
mdadm - RAID management utility 2014-08-04 04:31:06 +01:00
Formatted all pages according to guidelines. 2016-01-07 17:31:27 +00:00			`- Mark disk as failed:`
mdadm - RAID management utility 2014-08-04 04:31:06 +01:00
mdadm: add sudo, add --zero-superblock example (#8618) 2022-10-02 21:25:35 +01:00			`sudo mdadm --fail {{/dev/md0}} {{/dev/sdXN}}`
mdadm - RAID management utility 2014-08-04 04:31:06 +01:00
Formatted all pages according to guidelines. 2016-01-07 17:31:27 +00:00			`- Remove disk:`
mdadm - RAID management utility 2014-08-04 04:31:06 +01:00
mdadm: add sudo, add --zero-superblock example (#8618) 2022-10-02 21:25:35 +01:00			`sudo mdadm --remove {{/dev/md0}} {{/dev/sdXN}}`
mdadm - RAID management utility 2014-08-04 04:31:06 +01:00
Formatted all pages according to guidelines. 2016-01-07 17:31:27 +00:00			`- Add disk to array:`
mdadm - RAID management utility 2014-08-04 04:31:06 +01:00
mdadm: add sudo, add --zero-superblock example (#8618) 2022-10-02 21:25:35 +01:00			`sudo mdadm --assemble {{/dev/md0}} {{/dev/sdXN}}`
mdadm - RAID management utility 2014-08-04 04:31:06 +01:00
Formatted all pages according to guidelines. 2016-01-07 17:31:27 +00:00			`- Show RAID info:`
mdadm - RAID management utility 2014-08-04 04:31:06 +01:00
mdadm: add sudo, add --zero-superblock example (#8618) 2022-10-02 21:25:35 +01:00			`sudo mdadm --detail {{/dev/md0}}`

			`- Reset disk by deleting RAID metadata:`

			`sudo mdadm --zero-superblock {{/dev/sdXN}}`