diff --git a/doc/en/installation/prerequisites.rst b/doc/en/installation/prerequisites.rst
index de8cd8bcf08013c61dfd078213f9a55815e082e6..6fcdb5faed33b6aa8954bfe6df3716b11c4a1944 100644
--- a/doc/en/installation/prerequisites.rst
+++ b/doc/en/installation/prerequisites.rst
@@ -139,20 +139,25 @@ Files system description:
 +============================+============================================================================================================+
 | swap                       | 1 to 1.5 total size of RAM space                                                                           |
 +----------------------------+------------------------------------------------------------------------------------------------------------+
-| /                          | at leas 20 GB                                                                                              |
+| /                          | at least 20 GB                                                                                             |
 +----------------------------+------------------------------------------------------------------------------------------------------------+
-| /var/log                   | at leas 10 GB                                                                                              |
+| /var/log                   | at least 10 GB                                                                                             |
 +----------------------------+------------------------------------------------------------------------------------------------------------+
 | /var/lib/centreon          | :ref:`define in previous chapter <diskspace>`                                                              |
 +----------------------------+------------------------------------------------------------------------------------------------------------+
-| /var/lib/centreon-broker   | at leas 5 GB                                                                                               |
+| /var/lib/centreon-broker   | at least 5 GB                                                                                              |
 +----------------------------+------------------------------------------------------------------------------------------------------------+
-| /var/cache/centreon/backup | at leas 10 GB (please daily export the backups and delete the exported data)                               |
+| /var/cache/centreon/backup | at least 10 GB (please daily export the backups and delete the exported data)                              |
 +----------------------------+------------------------------------------------------------------------------------------------------------+
 
 MariaDB DBMS
 ============
 
+.. note::
+    Al least 1GB of non allocated free space must be available on the **volum group**
+    where **/var/lib/mysql** is located when you want to use **snapshot LVM** as
+    backup method.
+
 Files system description:
 
 +----------------------------+------------------------------------------------------------------------------------------------------------+
@@ -160,13 +165,13 @@ Files system description:
 +============================+============================================================================================================+
 | swap                       | 1 to 1.5 total size of RAM space                                                                           |
 +----------------------------+------------------------------------------------------------------------------------------------------------+
-| /                          | at leas 20 GB                                                                                              |
+| /                          | at least 20 GB                                                                                             |
 +----------------------------+------------------------------------------------------------------------------------------------------------+
-| /var/log                   | at leas 10 GB                                                                                              |
+| /var/log                   | at least 10 GB                                                                                             |
 +----------------------------+------------------------------------------------------------------------------------------------------------+
 | /var/lib/mysql             | :ref:`define in previous chapter <diskspace>`                                                              |
 +----------------------------+------------------------------------------------------------------------------------------------------------+
-| /var/cache/centreon/backup | at leas 10 Go (please daily export the backups and delete the exported data)                               |
+| /var/cache/centreon/backup | at least 10 Go (please daily export the backups and delete the exported data)                              |
 +----------------------------+------------------------------------------------------------------------------------------------------------+
 
 Monitoring poller
@@ -179,13 +184,13 @@ Files system description:
 +============================+============================================================================================================+
 | swap                       | 1 to 1.5 total size of RAM space                                                                           |
 +----------------------------+------------------------------------------------------------------------------------------------------------+
-| /                          | at leas 20 GB                                                                                              |
+| /                          | at least 20 GB                                                                                             |
 +----------------------------+------------------------------------------------------------------------------------------------------------+
-| /var/log                   | at leas 10 GB                                                                                              |
+| /var/log                   | at least 10 GB                                                                                             |
 +----------------------------+------------------------------------------------------------------------------------------------------------+
-| /var/lib/centreon-broker   | at leas 5 GB                                                                                               |
+| /var/lib/centreon-broker   | at least 5 GB                                                                                              |
 +----------------------------+------------------------------------------------------------------------------------------------------------+
-| /var/cache/centreon/backup | at leas 5 Go (please daily export the backups and delete the exported data)                                |
+| /var/cache/centreon/backup | at least 5 Go (please daily export the backups and delete the exported data)                               |
 +----------------------------+------------------------------------------------------------------------------------------------------------+
 
 ****************
diff --git a/doc/fr/installation/prerequisites.rst b/doc/fr/installation/prerequisites.rst
index 4452fe6f3e2e07135126ccfb231d8be78ffc2fd1..60d1b6a23a5172add8c57d524bb6366d976bfd29 100644
--- a/doc/fr/installation/prerequisites.rst
+++ b/doc/fr/installation/prerequisites.rst
@@ -158,6 +158,11 @@ Description des partitions :
 SGBD MariaDB
 ============
 
+.. note::
+    1 Go d'espace libre non alloué doit être disponible sur le **volum group**
+    hébergeant la partition **/var/lib/mysql** lorsque vous souhaitez utiliser
+    le mode de sauvegarde **snapshot LVM**.
+
 Description des partitions :
 
 +----------------------------+-------------------------------------------------------------------------------------------------------------+