Assume two new drives have been installed which show up as /dev/sdb and /dev/sdc in fdisk -l.
mdadm --create --verbose /dev/md0 --level=stripe --raid-devices=2 /dev/sdb /dev/sdc;
parted -s -a optimal /dev/md0 mklabel gpt; #assign a partition tree type
parted -s -a optimal /dev/md0 mkpart primary 0% 100%; #create a single partition containing the entire disk
parted /dev/md0 print; #show some specs
mkfs.ext4 /dev/md0; #define the file system for the partition /dev/md0
mkdir /scratch; #the drive will be called 'scratch'
mount -t ext4 /dev/md0 /scratch; #mount drive for all users.
chmod -R 777 /scratch; #allow rwx access to everybody
aa=$(blkid /dev/md0 | awk '{print $2}' | sed 's/\"//g'); #get UUID of new raid array /dev/md0
cp /etc/fstab /etc/fstabORIG; #backup original fstab
echo "$aa /scratch ext4 defaults 0 0" >> /etc/fstab; #add a line to fstab to automount
umount /dev/md0; #unmount the raid array to test fstab
mount -a; #run /etc/fstab to remount
df; #make sure /dev/md0 is there
