How to delete an mdadm RAID Array

Deleting a software RAID array will result in all data stored in the devices being lost. So be careful when you remove a RAID array, take backups in case needed.

Before you can remove the software RAID array, you need to unmount it.

Where /dev/mdX is the device name for the RAID device you need to remove.

Find the disk used to create the RAID with the command

Stop the RAID device with the command

Now you need to run the following commands for each storage device that are part of the RAID device.

IMPORTANT: you need to run this for each member of the RAID device.

Finally edit /etc/mdadm/mdadm.conf, remove the entry for the RAID array.

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