btrfs-progs/Documentation/btrfs-convert.txt

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btrfs-convert(8)
================
NAME
----
btrfs-convert - convert from ext2/3/4 filesystem to btrfs or rollback
SYNOPSIS
--------
'btrfs-convert' [options] <device>
DESCRIPTION
-----------
'btrfs-convert' is used to convert existed ext2/3/4 to btrfs filesystem,
and the original filesystem image is accessible as from separate subvolume
named 'ext2_subvol' as file image.
OPTIONS
-------
-d::
Disable data checksum.
-i::
Ignore xattrs and ACLs.
-n::
Disable packing of small files.
-r::
Roll back to ext2fs.
EXIT STATUS
-----------
'btrfs-convert' will return 0 if no error happened.
If any problems happened, 1 will be returned.
AUTHOR
------
Written by Shilong Wang and Wenruo Qu.
COPYRIGHT
---------
Copyright (C) 2013 FUJITSU LIMITED.
License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
--------
`mkfs.btrfs`(8)