mkfs.btrfs

Create a BTRFS filesystem. Defaults to raid1, which specifies 2 copies of a data block spread across 2 different devices. More information: https://btrfs.readthedocs.io/en/latest/mkfs.btrfs.html.

• Create a btrfs filesystem on a single device:

sudo mkfs.btrfs --metadata single --data single /dev/sda

• Create a btrfs filesystem on multiple devices with raid1:

sudo mkfs.btrfs --metadata raid1 --data raid1 /dev/sda /dev/sdb /dev/sdN

• Set a label for the filesystem:

sudo mkfs.btrfs --label "label" /dev/sda [/dev/sdN]