7995: Add "dry run" note.

diff --git a/doc/install/install-keep-balance.html.textile.liquid b/doc/install/install-keep-balance.html.textile.liquid
index 85fe300305e2d2eb72e1579b9accd0567c562b43..f8d76564998257382297b1295acbce856c4e7609 100644 (file)
--- a/doc/install/install-keep-balance.html.textile.liquid
+++ b/doc/install/install-keep-balance.html.textile.liquid
@@ -6,6 +6,11 @@ title: Install Keep-balance
 
 Keep-balance deletes unreferenced and overreplicated blocks from Keep servers, makes additional copies of underreplicated blocks, and moves blocks into optimal locations as needed (e.g., after adding new servers).
 
+{% include 'notebox_begin' %}
+
+If you are installing keep-balance on an existing system with valuable data, you can run keep-balance in "dry run" mode first and review its logs as a precaution. To do this, use the @keepstore -never-delete=true@ flag or remove the @-commit-trash@ flag from your keep-balance startup script.
+
+{% include 'notebox_end' %}
 
 h2. Install keep-balance