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118 lines
3.2 KiB
ReStructuredText
118 lines
3.2 KiB
ReStructuredText
btrfs-restore(8)
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================
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SYNOPSIS
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--------
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**btrfs restore** [options] <device> <path> | -l <device>
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DESCRIPTION
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-----------
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**btrfs restore** is used to try to salvage files from a damaged filesystem and
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restore them into *path* or just list the subvolume tree roots. The filesystem
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image is not modified.
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If the filesystem is damaged and cannot be repaired by the other tools
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(:doc:`btrfs-check(8)<btrfs-check>` or :doc:`btrfs-rescue(8)<btrfs-rescue>`), **btrfs restore** could be used to
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retrieve file data, as far as the metadata are readable. The checks done by
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restore are less strict and the process is usually able to get far enough to
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retrieve data from the whole filesystem. This comes at a cost that some data
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might be incomplete or from older versions if they're available.
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There are several options to attempt restoration of various file metadata type.
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You can try a dry run first to see how well the process goes and use further
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options to extend the set of restored metadata.
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For images with damaged tree structures, there are several options to point the
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process to some spare copy.
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.. note::
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It is recommended to read the following btrfs wiki page if your data is
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not salvaged with default option:
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https://btrfs.wiki.kernel.org/index.php/Restore
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OPTIONS
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-------
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-s|--snapshots
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get also snapshots that are skipped by default
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-x|--xattr
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get extended attributes
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-m|--metadata
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restore owner, mode and times for files and directories
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-S|--symlinks
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restore symbolic links as well as normal files
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-i|--ignore-errors
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ignore errors during restoration and continue
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-o|--overwrite
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overwrite directories/files in *path*, e.g. for repeated runs
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-t <bytenr>
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use *bytenr* to read the root tree
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-f <bytenr>
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only restore files that are under specified subvolume root pointed by *bytenr*
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-u|--super <mirror>
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use given superblock mirror identified by <mirror>, it can be 0,1 or 2
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-r|--root <rootid>
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only restore files that are under a specified subvolume whose objectid is *rootid*
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-d
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find directory
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-l|--list-roots
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list subvolume tree roots, can be used as argument for *-r*
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-D|--dry-run
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dry run (only list files that would be recovered)
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--path-regex <regex>
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restore only filenames matching a regular expression (``regex(7)``)
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with a mandatory format
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``^/(|home(|/username(|/Desktop(|/.*))))$``
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The format is not very comfortable and restores all files in the
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directories in the whole path, so this is not useful for restoring
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single file in a deep hierarchy.
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-c
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ignore case (*--path-regex* only)
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-v|--verbose
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(deprecated) alias for global *-v* option
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``Global options``
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-v|--verbose
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be verbose and print what is being restored
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EXIT STATUS
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-----------
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**btrfs restore** returns a zero exit status if it succeeds. Non zero is
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returned in case of failure.
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AVAILABILITY
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------------
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**btrfs** is part of btrfs-progs. Please refer to the documentation at
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https://btrfs.readthedocs.io or wiki http://btrfs.wiki.kernel.org for further
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information.
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SEE ALSO
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--------
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:doc:`btrfs-check(8)<btrfs-check>`,
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:doc:`btrfs-rescue(8)<btrfs-rescue>`,
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:doc:`mkfs.btrfs(8)<mkfs.btrfs>`
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