***********************************************Check Kernel and load 
kernel v2.6 
uname -r
ls /proc/mdstat
sudo modprobe raid6
cat /proc/mdstat
modprobe raid#, where # is the RAID level that you want to check
*************************************************Install Tools
dnf install mdadm -y
apt install mdadm

**************************************************Disk Partions
# lsblk
fdisk /dev/sde
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1–4, default 1): 1
First sector (2048–2097151, default 2048):
Using default value 2048
[...]
Command (m for help): t
Selected partition 1
Hex code (type L to list all codes): da
Changed type of partition 'Linux' to 'Non-FS data'
Command (m for help): w
[...]


mdadm --examine /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1
*************************************Create Raid
mdadm -C /dev/md0 -l 6 -n 4 /dev/sdf1 /dev/sdg1 /dev/sdh1 /dev/sdi1


*************************************Checking a RAID Array
# cat /proc/mdstat
mdadm --misc --detail /dev/md0

*************************************Format and Mount the RAID Array
mkfs -t ext4 /dev/md0
mount -t ext4 /dev/md0 Temp

FStab:
/dev/md0                /mnt/raid0              ext4    defaults         0 0
*************************************Save RAID Array Configuration
man mdadm.conf
mdadm --verbose --detail --scan /dev/md0
mdadm --verbose --detail --scan /dev/md0 >> /etc/mdadm.conf
mdadm -E -s -v >> /etc/mdadm.conf

*************************************Monitoring Your RAID Array
mdadm --detail /dev/md0



mdadm --manage --stop /dev/md0