+#: en/persistence.conf.5:100
+#, fuzzy
+#| msgid ""
+#| "Save the rw branch of a union on the persistence media, so only the "
+#| "changes are stored persistently. This can potentially reduce disk usage "
+#| "compared to bind-mounts, and will not hide files added to the read-only "
+#| "media. One caveat is that the union will use I<DIR> from the image's read-"
+#| "only file system, not the real file system root, so files created after "
+#| "boot (e.g. by live-config) will not appear in the union. This option will "
+#| "use the union file system specified by live-boot's B<union> boot "
+#| "parameter, but is not supported with B<union=unionmount>."