To create raid 1 in live linux system
parted -a optimal /dev/sdf
Place a flag gpt or mbrmklabel gpt
Create partitionsmkpart primary ext4 0% 100%
Mark partition as software raid partitionset 1 raid on
Verify its allignedalign-check
optimal
Show resultsprint
Prepare second disk
Raid 0 arraymdadm --create /dev/md2 --level=0 --raid-devices=2 /dev/sdaX /dev/sdbX
Raid 1 array mdadm --create /dev/md0 --level=1 --raid-devices=2 --spare=0 /dev/sdaX /dev/sdbX
Raid 10 arraymdadm --create /dev/md0 --level=10 --raid-devices=4 /dev/sd[a-d]X
Check resultscat /proc/mdstat
Format arraymkfs.ext4 /dev/mdX
Mount and write to fstab
Write raid to a mdadm.confmdadm --detail --scan >> /etc/mdadm/mdadm.conf
Update initramfsupdate-initramfs -u