I am running btrfs 4.15.1 on a fresh ubuntu 18.04 server. I have a small hardrive which for
/ and a large disk for documents served to my colleagues in our office via samba. That data drive is used entirely for this, has been created by
mkfs.btrfs /deb/sdb/ and is mounted to
Further down the road I want to add a second harddisk and convert the singledrive data disk into a RAID1 (data & metadata I guess). Would the commands below achieve that goal?
btrfs device add /dev/sdc /mnt/data btrfs balance start -dconvert=raid1 -mconvert=raid1 /mnt
would I have to do a
mkfs.btrfs /dev/sdc/ before adding the new harddrive to the system?