tldr/pages/linux/mdadm.md

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# mdadm
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> RAID management utility.
> More information: <https://linux.die.net/man/8/mdadm>.
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- Create array:
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`mdadm --create {{/dev/md/MyRAID}} --level {{raid_level}} --raid-devices {{number_of_disks}} {{/dev/sdXN}}`
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- Stop array:
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`mdadm --stop {{/dev/md0}}`
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- Mark disk as failed:
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`mdadm --fail {{/dev/md0}} {{/dev/sdXN}}`
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- Remove disk:
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`mdadm --remove {{/dev/md0}} {{/dev/sdXN}}`
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- Add disk to array:
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`mdadm --assemble {{/dev/md0}} {{/dev/sdXN}}`
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- Show RAID info:
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`mdadm --detail {{/dev/md0}}`