Borg

Borg backup

Links

• Homepage
• Borg FAQ
• support keyring for passphrase storage
• Borg on windows
• A borg script
• About upgrading to borg 2
• Someone did some benchmarking

Tools

• [ https://vorta.borgbase.com/ Vorta, a borg backup GUI for Linux and MacOS]

HOWTO

Check repository on server

borg check --repository-only

does not need key

Rename repository

• On server: rename repository
• On client: change previous_location in ~/.cache/borg/*.config
• BORG_RELOCATED_REPO_ACCESS_IS_OK=yes

Delete files/directories from repository

borg recreate --exclude foo/bar myrepo

After that you might want to run

borg compact myrepe

Extract with pattern

borg extract server:repo sh:path/to/files.*

Install using pip

apt-get install libssl-dev python3-cryptography liblz4-dev libzstd-dev libxxhash-dev libacl1-dev 
pip install borgbackup==1.2.0

Mount borg archive

borg mount

borg mount not available: no FUSE support, BORG_FUSE_IMPL=pyfuse3,llfuse

apt install python3-pyfuse3

FAQ

4 orphaned objects found!

A job for borg check

Borg list only shows checkpoints

Means the backup wasn't finished.

Enter passphrase for key

probably means the BORG_PASSPHRASE

Remote: Using a pure-python msgpack! This will result in lower performance

On CentOS: try installing python34-msgpack?

'user@borgserver' ?

Error messages

nonce: file changed while we backed it up

"bug", this will go away in borg 2, ignore or exclude for now

does not look like a Borg cache

It got corrupted somehow, try

borg delete --cache-only REPO

Connection closed by remote host. Is borg working on the server?

Usually ssh key problem of it means borg is not installed on the server

Failed to create/acquire the lock

Usually the 'timeout' bit is relevant. Just try again later. Does the backup or source happen to be pretty big?

Also check access rights on the lock file.

BlockingIOError: [Errno 11] Resource temporarily unavailable

windows?

Corrupted segment reference count - corrupted index or hints

For some reason it might help to run

borg check --repository-only

Exception: FD exception occurred

Probably running borg on cygwin, could be ssh key issue. Try

BORG_RSH="ssh -vvv" borg ...

Also check your quotes

Cache, or information obtained from the security directory is newer than repository - this is either an attack or unsafe (multiple repos with same ID)

Something broke during a backup, try (re)moving ~/.config/borg/security/<id> and ~/.cache/borg/<id>.

Prune: Chunk ID missing from chunks index, corrupted chunks index - aborting transaction.

Try

borg check ( --repair )

If check finds no problem, delete cache:

mv ~/.cache/borg ~/.cache/borg_corrupted

ValueError: stats_against: key contained in self but not in master_index.

Try

borg check ( --repair )

The 'borgbackup==1.1.3' distribution was not found and is required by the application

Incomplete install?

Segment not found, but listed in compaction data

Try

borg check

and then perhaps

borg check --repair

Deduplicated size

For single archive: total size of unique chunks for this archive