Creating RAID and mounting it

Is [[Formatting - Drives]] needed? Do that first, then come back.

See if mdadm is installed or not
mdadm

  If not, install it
  apt install mdadm

Check for all storage drives in system
lsblk

Create the RAID with the drive you are going to use
mdadm --create /dev/md111((create your own file name)) --level=5 --raid-devices=4 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1

Check to see if the array is in progress
cat /proc/mdstat

Check the block ID for the new virtual drive/s
blkid

Make a File System on that new drive
mkfs.ext4 /dev/md111 (find your own disk location)

mkfs.ext4 - .ext4 means the "type" of file. shown on "sudo blkin" then state locate of the file its going to be

Create a location to mount the new virtual drive/s
"/" is a good place to start

Mount the RAID to the storage location
mount /dev/md111 /sirstorage

Check to see if the RAID is in the location you created
df -h
sudo mdadm --detail /dev/md111 <----Local RAID location

Add array to the fstab file | this will mount the array every time the computer starts up. You can do this with as many mounts/drives as you like. 
nano /etc/fstab
           look at the headers and include this under the correct header
        File system: `/dev/md111` mount point: `/storage/location` type: `ext4` options: `errors=remount-ro` put zeros on the rest.

Test to see if array mount worked
umount /storage/location
mount -a

**Reboot!!**
    Reboot the system, just in case. Make sure the array is still mounting after reboot. If its there, you are good to go son!

Need to extend your RAID? Go find that one. "Extending RAID"