diff --git a/xml/depl_docupdates.xml b/xml/depl_docupdates.xml
index bea0e9ca5..0fa5aaed9 100644
--- a/xml/depl_docupdates.xml
+++ b/xml/depl_docupdates.xml
@@ -474,6 +474,12 @@
().
+
+
+ Added
+ ().
+
+
Provided additional information on bonding modes at
-
+
+
+ Recovering From an Unresolvable DRBD Split Brain Situation
+
+
+ Although policies to automatically resolve a DRBD split brain situations
+ exist, there are situations which require to be resolved manually. Such a
+ situation is indicated by a Kernel message like:
+
+ kernel: block drbd0: Split-Brain detected, dropping connection!
+
+ To resolve the split brain you need to choose a node which data
+ modifications will be discarded. These modifications will be replaced by
+ the data from the healthy node and will not be recoverable,
+ so make sure to choose the right node. If in doubt, make a backup of the
+ node before starting the recovery process. Proceed as follows:
+
+
+
+
+ Put the cluster in maintenance mode:
+
+ crm configure property maintenance-mode=true
+
+
+
+ If the chosen node is in primary role, stop all services using this
+ ressource and switch it to secondary role. Skip thios step, if the
+ already is in secondary role.
+
+ drbdadm secondary RESSOURCE
+
+ To check if a node is in primary role, see the output of
+ systemctl status drbd.
+
+
+
+
+ If the node is in state WFConnection disconnect
+ the ressource:
+
+ drbdadm disconnect RESSOURCE
+
+ To check if a node is in state WFConnection,
+ see the output of systemctl status drbd.
+
+
+
+
+ Discard all modifications on the chosen node. This step is
+ irreversible, the modifications on the chosen node will be lost!
+
+ drbdadm -- --discard-my-data connect RESSOURCE
+
+
+
+ If the other (healthy) node is in state
+ WFConnection, synchronization to the chosen node
+ will start automatically. If not, reconnect the healthy node to start
+ the synchronization.
+
+ drbdadm connect RESSOURCE
+
+ During the synchronization all data modifications on the chosen node
+ will be overwritten with the data from the healthy node.
+
+
+
+
+ Reset the cluster to normal mode when the synchronization has
+ finished:
+
+ crm configure property maintenance-mode=false
+
+
+