Update cheatsheets

linux/mdadm

@@ -0,0 +1,37 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# 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}}`