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documentation: btrbk.1.asciidoc: add note about "prune": source/target must be accessible 

Related to: c65f937473
prune-ignore-latest-common
Axel Burri 2018-08-27 15:50:36 +02:00
parent 069304f3bb
commit 1862bc16d3
1 changed files with 11 additions and 3 deletions
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doc/btrbk.1.asciidoc
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@ -191,9 +191,12 @@ configuring the retention policy.
Snapshot only: skips backup creation and deletion (steps 2 and
3). Use in conjunction with -p, --preserve (or
--preserve-snapshots) if you also want to skip snapshot deletion
(step 4). Note that snapshot deletion is skipped if the target is
not accessible, as it is still required in order to determine the
latest snapshot/backup pair.
(step 4).
+
Note that snapshot deletion is skipped if the target is not
accessible, as it is still required in order to determine the latest
snapshot/backup pair (which is always preserved, regardless of the
retention policy).
*resume* [filter...]::
Resume backups: skips snapshot creation (step 1), transfers and
@ -209,6 +212,11 @@ configuring the retention policy.
disk after changing the retention policy. Use in conjunction with
--preserve-backups, --preserve-snapshots if you want to skip
backup or snapshot deletion (steps 3, 4).
+
Note that deletion is skipped if source or target is not accessible,
as it is still required in order to determine the latest
snapshot/backup pair (which is always preserved, regardless of the
retention policy).
*archive* <source> <target> _*experimental*_::
Recursively copy all subvolumes created by btrbk from <source> to