mdadm - Software Raid

Basic commands dealing mdadm

Create an array
mdadm --create /dev/md/md_name --level=<RAID-Level> --raid-devices=<amount of physical partitions at array> /dev/sdX1 /dev/sdY1

Check raid array
mdadm --detail /dev/md/<LABEL>
# or
cat /proc/mdstat

Remove raid array
umount /dev/md/md_name
mdadm --stop /dev/md/md_name
mdadm --zero-superblock /dev/sdX1
mdadm --zero-superblock /dev/sdY1

Restart sync of array
1	`mdadm --readwrite /dev/md/md_name`

Update raid config
1	`/usr/share/mdadm/mkconfig > /etc/mdadm/mdamd.conf`

Additional tasks, when device is needed for boot

1
2
3

update-initramfs -u
update-grub2
grub-install /dev/sdX