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MKFS.BTRFS(8)							 MKFS.BTRFS(8)

NAME
       mkfs.btrfs - create a btrfs filesystem

SYNOPSIS
       mkfs.btrfs  [  -A alloc-start ] [ -b byte-count ] [ -d data-profile ] [
       -l leafsize ] [ -L  label  ]  [	-m  metadata  profile  ]  [  -M	 mixed
       data+metadata ] [ -n nodesize ] [ -s sectorsize ] [ -r rootdir ] [ -K ]
       [ -h ] [ -V ]
	device [ device ... ]

DESCRIPTION
       mkfs.btrfs is used to create a btrfs filesystem (usually in a disk par‐
       tition,	or  an	array of disk partitions).  device is the special file
       corresponding to the device (e.g /dev/sdXX  ).	If  multiple   devices
       are specified, btrfs is created spanning across the specified  devices.

OPTIONS
       -A, --alloc-start offset
	      Specify  the  offset  from  the start of the device to start the
	      btrfs filesystem. The default value is zero, or the start of the
	      device.

       -b, --byte-count size
	      Specify  the size of the resultant filesystem. If this option is
	      not used, mkfs.btrfs uses all  the  available  storage  for  the
	      filesystem.

       -d, --data type
	      Specify  how  the data must be spanned across the devices speci‐
	      fied. Valid values are raid0, raid1, raid10 or single.

       -l, --leafsize size
	      Specify the leaf size, the least data item in which btrfs stores
	      data. The default value is the page size.

       -L, --label name
	      Specify a label for the filesystem.

       -m, --metadata profile
	      Specify  how  metadata must be spanned across the devices speci‐
	      fied. Valid values are raid0, raid1, raid10 or single.

       -M, --mixed
	      Mix data and metadata chunks together for more  efficient	 space
	      utilization.   This  feature  incurs  a  performance  penalty in
	      larger filesystems.  It is recommended for use with  filesystems
	      of 1 GiB or smaller.

       -n, --nodesize size
	      Specify  the  nodesize. By default the value is set to the page‐
	      size.

       -s, --sectorsize size
	      Specify the sectorsize, the minimum block allocation.

       -r, --rootdir rootdir
	      Specify a directory to copy into the newly created fs.

       -K, --nodiscard
	      Do not perform whole device TRIM operation by default.

       -V, --version
	      Print the mkfs.btrfs version and exit.

AVAILABILITY
       mkfs.btrfs is part of  btrfs-progs.  Btrfs  is  currently  under	 heavy
       development,  and not suitable for any uses other than benchmarking and
       review.	Please refer to the  btrfs  wiki  http://btrfs.wiki.kernel.org
       for further details.

SEE ALSO
       btrfsck(8)

								 MKFS.BTRFS(8)

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