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.TH BORG-UPGRADE 1 "2022-04-14" "" "borg backup tool"
.SH NAME
borg-upgrade \- upgrade a repository from a previous version
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.SH SYNOPSIS
.sp
borg [common options] upgrade [options] [REPOSITORY]
.SH DESCRIPTION
.sp
Upgrade an existing, local Borg repository.
.SS When you do not need borg upgrade
.sp
Not every change requires that you run \fBborg upgrade\fP\&.
.sp
You do \fBnot\fP need to run it when:
.INDENT 0.0
.IP \(bu 2
moving your repository to a different place
.IP \(bu 2
upgrading to another point release (like 1.0.x to 1.0.y),
except when noted otherwise in the changelog
.IP \(bu 2
upgrading from 1.0.x to 1.1.x,
except when noted otherwise in the changelog
.UNINDENT
.SS Borg 1.x.y upgrades
.sp
Use \fBborg upgrade \-\-tam REPO\fP to require manifest authentication
introduced with Borg 1.0.9 to address security issues. This means
that modifying the repository after doing this with a version prior
to 1.0.9 will raise a validation error, so only perform this upgrade
after updating all clients using the repository to 1.0.9 or newer.
.sp
This upgrade should be done on each client for safety reasons.
.sp
If a repository is accidentally modified with a pre\-1.0.9 client after
this upgrade, use \fBborg upgrade \-\-tam \-\-force REPO\fP to remedy it.
.sp
If you routinely do this you might not want to enable this upgrade
(which will leave you exposed to the security issue). You can
reverse the upgrade by issuing \fBborg upgrade \-\-disable\-tam REPO\fP\&.
.sp
See
\fI\%https://borgbackup.readthedocs.io/en/stable/changes.html#pre\-1\-0\-9\-manifest\-spoofing\-vulnerability\fP
for details.
.SS Borg 0.xx to Borg 1.x
.sp
This currently supports converting Borg 0.xx to 1.0.
.sp
Currently, only LOCAL repositories can be upgraded (issue #465).
.sp
Please note that \fBborg create\fP (since 1.0.0) uses bigger chunks by
default than old borg did, so the new chunks won\(aqt deduplicate
with the old chunks in the upgraded repository.
See \fB\-\-chunker\-params\fP option of \fBborg create\fP and \fBborg recreate\fP\&.
.SH OPTIONS
.sp
See \fIborg\-common(1)\fP for common options of Borg commands.
.SS arguments
.INDENT 0.0
.TP
.B REPOSITORY
path to the repository to be upgraded
.UNINDENT
.SS optional arguments
.INDENT 0.0
.TP
.B \-n\fP,\fB  \-\-dry\-run
do not change repository
.TP
.B \-\-inplace
rewrite repository in place, with no chance of going back to older versions of the repository.
.TP
.B \-\-force
Force upgrade
.TP
.B \-\-tam
Enable manifest authentication (in key and cache) (Borg 1.0.9 and later).
.TP
.B \-\-disable\-tam
Disable manifest authentication (in key and cache).
.UNINDENT
.SH EXAMPLES
.INDENT 0.0
.INDENT 3.5
.sp
.nf
.ft C
# Upgrade the borg repository to the most recent version.
$ borg upgrade \-v /path/to/repo
making a hardlink copy in /path/to/repo.before\-upgrade\-2016\-02\-15\-20:51:55
opening attic repository with borg and converting
no key file found for repository
converting repo index /path/to/repo/index.0
converting 1 segments...
converting borg 0.xx to borg current
no key file found for repository
.ft P
.fi
.UNINDENT
.UNINDENT
.SH SEE ALSO
.sp
\fIborg\-common(1)\fP
.SH AUTHOR
The Borg Collective
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