RAID edits
* Enter the system setup menu at boot time, then you also have to press additional keys to get to the RAID screen
* create a new virtual disk and assign the new disks, then initialize the VD

Mounting the new VD
* find the disk with `fdisk -l | grep '^Disk'`
* create a partition table
    * `fdisk /dev/sdb`
    * `p` to list partition table if any
    * `n` to create a new partition
    * `w` to write the new partition
* format the new partition with `mkfs.ext4 /dev/sdb1`
* create an access folder, maybe at //mnt/backup
* run the mount `mount /dev/sdb1 /mnt/backup`
* edit fstab by adding
    * using device name
    ```
    //dev/sdb1  /mnt/backup ext4    defaults    1   2
    ```
    * using UUID (do `sudo blkid` to get the UUID)
    ```
    UUID="86e81045-a0dc-4881-8ddb-5ef25834ea5a" /datadrive  xfs     defaults,nofail 1       2
    ```
* somehow in the process an new systemctl service module is loaded based on fstab at runs at boot