linux/mdadm.md
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@@ -11,3 +11,9 @@ sudo mdadm --examine /dev/sdb1
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sudo mdadm --manage /dev/md127 --re-add /dev/sdb1 # if using same disk
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sudo mdadm --manage /dev/md127 --add /dev/sdb1 # if using new disk
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```
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+
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+* had to run this when one of the disks was offline on boot and the system dropped into maintenance mode
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+```
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+mdadm --stop /dev/md127
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+mdadm --assemble --scan
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+```