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btrfs-progs: docs: update btrfs-convert regarding reiserfs

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Signed-off-by: David Sterba <dsterba@suse.com>
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David Sterba 2017-08-22 19:18:48 +02:00
parent e75f466ddd
commit ebf449b521
1 changed files with 18 additions and 9 deletions
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27
Documentation/btrfs-convert.asciidoc
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@ -3,7 +3,7 @@ btrfs-convert(8)
NAME NAME
---- ----
btrfs-convert - convert from ext2/3/4 filesystem to btrfs in-place btrfs-convert - convert from ext2/3/4 or reiserfs filesystem to btrfs in-place
SYNOPSIS SYNOPSIS
-------- --------
@ -11,13 +11,22 @@ SYNOPSIS
DESCRIPTION DESCRIPTION
----------- -----------
*btrfs-convert* is used to convert existing ext2/3/4 filesystem image to a *btrfs-convert* is used to convert existing source filesystem image to a btrfs
btrfs filesystem in-place. The original filesystem image is accessible filesystem in-place. The original filesystem image is accessible in subvolume
subvolume named 'ext2_saved' as file 'image'. named like 'ext2_saved' as file 'image'.
WARNING: If you are going to perform rollback to ext2/3/4, you should not Supported filesystems:
execute *btrfs balance* command on the converted filesystem. This will change
the extent layout and make *btrfs-convert* unable to rollback. * ext2, ext3, ext4 -- original feature, always built in
* reiserfs -- since version 4.13, opptinally built, requires libreiserfscore 3.6.27
The list of supported source filesystem by a given binary is listed at the end
of help (option '--help').
WARNING: If you are going to perform rollback to the original filesystem, you
should not execute *btrfs balance* command on the converted filesystem. This
will change the extent layout and make *btrfs-convert* unable to rollback.
The conversion utilizes free space of the original filesystem. The exact The conversion utilizes free space of the original filesystem. The exact
estimate of the required space cannot be foretold. The final btrfs metadata estimate of the required space cannot be foretold. The final btrfs metadata
@ -38,8 +47,8 @@ NOTE: The source filesystem should be clean, you are encouraged to run the
**REMOVE THE ORIGINAL FILESYSTEM METADATA** **REMOVE THE ORIGINAL FILESYSTEM METADATA**
By removing the 'ext2_saved' subvolume, all metadata of the original filesystem By removing the subvolume named like 'ext2_saved' or 'reiserfs_saved', all
will be removed: metadata of the original filesystem will be removed:
# btrfs subvolume delete /mnt/ext2_saved # btrfs subvolume delete /mnt/ext2_saved