How do I set up the software RAID configuration file /etc/mdadm.conf to automate RAID?

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First, make sure that the RAID devices are active. This is to ensure that software RAID is actually working before creating the configuration file. This can be verified by checking /proc/mdstat or running:

# mdadm -D <RAID device>

Suppose that SCSI disks were used for the software RAID, /etc/mdadm.conf can now be configured as foll...

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