mdadm

RAID management utility. More information: https://manned.org/mdadm.

• Create array:

sudo mdadm --create /dev/md/MyRAID --level raid_level --raid-devices number_of_disks /dev/sdXN

• Stop array:

sudo mdadm --stop /dev/md0

• Mark disk as failed:

sudo mdadm --fail /dev/md0 /dev/sdXN

• Remove disk:

sudo mdadm --remove /dev/md0 /dev/sdXN

• Add disk to array:

sudo mdadm --assemble /dev/md0 /dev/sdXN

• Show RAID info:

sudo mdadm --detail /dev/md0

• Reset disk by deleting RAID metadata:

sudo mdadm --zero-superblock /dev/sdXN