Raid 1 with MDADM
create RAID1 with 2 phys disks
mdadm --create --verbose /dev/md0 --level=1 --raid-devices=2 /dev/sdb /dev/sdc
save to config file
mdadm --verbose --detail -scan > /etc/mdadm.conf
start/stop/restart an array
mdadm --stop /dev/md0
mdadm --remove /dev/md0
mdadm --assemble /dev/md0
check state of array
mdadm --detail /dev/md0
Create filestystem
mkfs.ext4 /dev/md0
mkdir /data01
mount /dev/md0 /data01