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-rw-r--r--doc/src/sgml/backup.sgml4
1 files changed, 3 insertions, 1 deletions
diff --git a/doc/src/sgml/backup.sgml b/doc/src/sgml/backup.sgml
index 737355a911d..96418e2ca03 100644
--- a/doc/src/sgml/backup.sgml
+++ b/doc/src/sgml/backup.sgml
@@ -837,7 +837,9 @@ SELECT pg_stop_backup();
a fatal error if a file was truncated while <application>tar</> was
copying it. Fortunately, GNU <application>tar</> versions 1.16 and
later exit with 1 if a file was changed during the backup,
- and 2 for other errors.
+ and 2 for other errors. With GNU <application>tar</> version 1.23 and
+ later, you can use the warning options <literal>--warning=no-file-changed
+ --warning=no-file-removed</literal> to hide the related warning messages.
</para>
<para>