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/swapfile none swap sw 0 0
Note that the second UUID does refer refers to /dev/md0, despite whereas the UUID in the contents of mdadm.confis the UUID of the 3 RAID5 drives together:
blkid /dev/md0
/dev/md0: UUID="aa65554a-24d9-450a-b10c-63c5c6a4b48a" TYPE="ext4"
Note we have an active RAID5 array:
cat /proc/mdstat
Instructions for taking apart and/or (re-)creating a RAID array are here:
*https://www.digitalocean.com/community/tutorials/how-to-create-raid-arrays-with-mdadm-on-ubuntu-18-04
===Dev Tools===
