Howto mdadm¶

lsblk is your best friend

lsblk

we are going to use partitions as base for the raid

create Linux RAID partitions¶

fdisk /dev/nvme0n1

create new GPT disklabel¶

g

create new partion¶

n

change type to Linux RAID¶

t

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repeat for all drives e.g. /dev/nvme0n1 and /dev/nvme1n1

check with lsblk

create Raid¶

mdadm --create /dev/md20 --level=1 --raid-devices=2 /dev/nvme0n1p1 /dev/nvme1n1p1

check with lsblk

create filesystem on Raid¶

mkfs.xfs /dev/md20