From 3838ce33306f19f4eeefb78172cea1408695d1fe Mon Sep 17 00:00:00 2001
From: Dietmar Maurer <dietmar@proxmox.com>
Date: Fri, 8 Jan 2021 17:34:58 +0100
Subject: [PATCH] tape: add retention policy docu

---
 docs/tape-backup.rst | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/docs/tape-backup.rst b/docs/tape-backup.rst
index 07a2213a..d2c2f275 100644
--- a/docs/tape-backup.rst
+++ b/docs/tape-backup.rst
@@ -420,6 +420,14 @@ one media pool, so a job only uses tapes from that pool.
 
    Defines how long we want to keep the data.
 
+   - Always overwrite media.
+
+   - Protect data for the duration specified.
+
+     We use systemd like time spans to specify durations, e.g. ``2
+     weeks`` (see `systemd.time manpage`_).
+
+   - Never overwrite data.
 
 .. NOTE:: FIXME: Add note about global content namespace. (We do not store
    the source datastore, so it is impossible to distinguish