mkfs.btrfs, part of btrfs-progs v4.4

usage: mkfs.btrfs [options] dev [ dev ... ] options: -A|--alloc-start START the offset to start the FS -b|--byte-count SIZE total number of bytes in the FS -d|--data PROFILE data profile, raid0, raid1, raid5, raid6, raid10, dup or single -f|--force force overwrite of existing filesystem -l|--leafsize SIZE deprecated, alias for nodesize -L|--label LABEL set a label -m|--metadata PROFILE metadata profile, values like data profile -M|--mixed mix metadata and data together -n|--nodesize SIZE size of btree nodes -s|--sectorsize SIZE min block allocation (may not mountable by current kernel) -r|--rootdir DIR the source directory -K|--nodiscard do not perform whole device TRIM -O|--features LIST comma separated list of filesystem features, use '-O list-all' to list features -U|--uuid UUID specify the filesystem UUID -q|--quiet no messages except errors -V|--version print the mkfs.btrfs version and exit