From 6cc9d8c72a56563b6d1a12b8b441dfa9dde345e9 Mon Sep 17 00:00:00 2001
From: Julien Dessaux
Date: Tue, 28 Apr 2020 17:29:52 +0200
Subject: Long overdue first commit with content

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+---
+title: "mdadm"
+linkTitle: "mdadm"
+date: 2011-11-15
+description: >
+  mdadm
+---
+
+## Watch the array status
+
+{{< highlight sh >}}
+watch -d -n10 mdadm --detail /dev/md127
+{{< /highlight >}}
+
+## Recovery from livecd
+
+{{< highlight sh >}}
+mdadm --examine --scan >> /etc/mdadm.conf
+mdadm --assemble --scan /dev/md/root
+mount /dev/md127 /mnt  # or vgscan...
+{{< /highlight >}}
+
+If auto detection does not work, you can still assemble an array manually :
+{{< highlight sh >}}
+mdadm --assemble /dev/md0 /dev/sda1 /dev/sdb1 
+{{< /highlight >}}
+
+## Resync an array
+
+First rigorously check the output of `cat /proc/mdstat`
+{{< highlight sh >}}
+mdadm --manage --re-add /dev/md0 /dev/sdb1
+{{< /highlight >}}
+
+## Destroy an array
+
+{{< highlight sh >}}
+mdadm --stop /dev/md0
+mdadm --zero-superblock /dev/sda
+mdadm --zero-superblock /dev/sdb
+{{< /highlight >}}
+
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