Fix mdadm RAID after OS Reinstall

mdraid_fix.sh

# reassemble the raid
sudo mdadm --assemble --scan
sudo mdadm --detail --scan | sudo tee -a /etc/mdadm.conf

# Rebuild kernel to include the raid configuration
sudo dracut -f /boot/initramfs-$(uname -r).img $(uname -r)
sudo grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg

# Remake the file system
sudo sfdik --delete /dev/md0
sudo mkfs.xfs -f /dev/md0

# Add to fstab
sudo echo "UUID=$(blkid -o value -s UUID /dev/md0)   /mnt/data0      xfs     defaults,nofail  0 0" | tee -a /etc/fstab