open a raid 10 drive named my-dirvde

mkfs.btrfs -m raid10 -d raid10 /dev/sd{a,b,c,d,e,f}
mkdir /mnt/my-btrfs
mount -t btrfs -o compress=lzo,ssd,noatime,space_cache /dev/sd{a,b,c,d,e,f} /mnt/my-btrfs