mirror of
https://github.com/borgbackup/borg.git
synced 2024-12-25 17:27:31 +00:00
75 lines
3.5 KiB
HTML
75 lines
3.5 KiB
HTML
.. _borg_check:
|
|
|
|
borg check
|
|
----------
|
|
::
|
|
|
|
usage: borg check [-h] [-v] [--debug] [--lock-wait N] [--show-rc]
|
|
[--no-files-cache] [--umask M] [--remote-path PATH]
|
|
[--repository-only] [--archives-only] [--repair]
|
|
[--save-space] [--last N] [-P PREFIX]
|
|
[REPOSITORY_OR_ARCHIVE]
|
|
|
|
Check repository consistency
|
|
|
|
positional arguments:
|
|
REPOSITORY_OR_ARCHIVE
|
|
repository or archive to check consistency of
|
|
|
|
optional arguments:
|
|
-h, --help show this help message and exit
|
|
-v, --verbose, --info
|
|
enable informative (verbose) output, work on log level
|
|
INFO
|
|
--debug enable debug output, work on log level DEBUG
|
|
--lock-wait N wait for the lock, but max. N seconds (default: 1).
|
|
--show-rc show/log the return code (rc)
|
|
--no-files-cache do not load/update the file metadata cache used to
|
|
detect unchanged files
|
|
--umask M set umask to M (local and remote, default: 0077)
|
|
--remote-path PATH set remote path to executable (default: "borg")
|
|
--repository-only only perform repository checks
|
|
--archives-only only perform archives checks
|
|
--repair attempt to repair any inconsistencies found
|
|
--save-space work slower, but using less space
|
|
--last N only check last N archives (Default: all)
|
|
-P PREFIX, --prefix PREFIX
|
|
only consider archive names starting with this prefix
|
|
|
|
Description
|
|
~~~~~~~~~~~
|
|
|
|
The check command verifies the consistency of a repository and the corresponding archives.
|
|
|
|
First, the underlying repository data files are checked:
|
|
|
|
- For all segments the segment magic (header) is checked
|
|
- For all objects stored in the segments, all metadata (e.g. crc and size) and
|
|
all data is read. The read data is checked by size and CRC. Bit rot and other
|
|
types of accidental damage can be detected this way.
|
|
- If we are in repair mode and a integrity error is detected for a segment,
|
|
we try to recover as many objects from the segment as possible.
|
|
- In repair mode, it makes sure that the index is consistent with the data
|
|
stored in the segments.
|
|
- If you use a remote repo server via ssh:, the repo check is executed on the
|
|
repo server without causing significant network traffic.
|
|
- The repository check can be skipped using the --archives-only option.
|
|
|
|
Second, the consistency and correctness of the archive metadata is verified:
|
|
|
|
- Is the repo manifest present? If not, it is rebuilt from archive metadata
|
|
chunks (this requires reading and decrypting of all metadata and data).
|
|
- Check if archive metadata chunk is present. if not, remove archive from
|
|
manifest.
|
|
- For all files (items) in the archive, for all chunks referenced by these
|
|
files, check if chunk is present (if not and we are in repair mode, replace
|
|
it with a same-size chunk of zeros). This requires reading of archive and
|
|
file metadata, but not data.
|
|
- If we are in repair mode and we checked all the archives: delete orphaned
|
|
chunks from the repo.
|
|
- if you use a remote repo server via ssh:, the archive check is executed on
|
|
the client machine (because if encryption is enabled, the checks will require
|
|
decryption and this is always done client-side, because key access will be
|
|
required).
|
|
- The archive checks can be time consuming, they can be skipped using the
|
|
--repository-only option.
|