diff --git a/backup_rman_AL_fct_FRA_Usage.sh b/backup_rman_AL_fct_FRA_Usage.sh
index a3afca5..2da5957 100755
--- a/backup_rman_AL_fct_FRA_Usage.sh
+++ b/backup_rman_AL_fct_FRA_Usage.sh
@@ -4,42 +4,40 @@
 # pour sauvegarder les archivelog et purger la FRA
 # 
 
-#
-# Vérification du paramètre d'entrée
-ORACLE_SID=$1
-[ "${ORACLE_SID}" ] || (echo syntax : $0 ORACLE_SID && exit 2);
-
 # Variables d'initialisation 
 script_dir=/home/oracle/scripts
 pct_limit=80
 action_script="${script_dir}/backup_rman_AL.sh ${ORACLE_SID}"
 
-#
-# positionner les variables d'environnement ORACLE
-#
-export ORACLE_SID
-ORAENV_ASK=NO
-PATH=/usr/local/bin:$PATH
-. oraenv -s >/dev/null
+for sid in $(ps -ef | grep pmon | grep -v grep | cut -d_ -f3 | sort)
+do 
+    #
+    # positionner les variables d'environnement ORACLE
+    #
+    ORACLE_SID=$sid
+    ORAENV_ASK=NO
+    PATH=/usr/local/bin:$PATH
+    . oraenv -s >/dev/null
 
-# 
-# calcul de la taille FRA 
-#
-fra_usage=$(sqlplus -s '/ as sysdba' << EOF
-    set pages 0 feedback off;
-    select round(sum(percent_space_used),0) from v\$flash_recovery_area_usage;
+    # 
+    # calcul de la taille FRA 
+    #
+    fra_usage=$(sqlplus -s '/ as sysdba' << EOF
+        set pages 0 feedback off;
+        select round(sum(percent_space_used),0) from v\$flash_recovery_area_usage;
 EOF
 ) 
 
-pct_fra_used=$(echo ${fra_usage} | egrep -o "[0-9]*")
+    pct_fra_used=$(echo ${fra_usage} | egrep -o "[0-9]*")
 
-# 
-# Si la FRA dépasse la limite on lance le script
-#
-if [ "${pct_fra_used}" -gt ${pct_limit} ]
-then
-    echo ${pct_fra_used} : backup des archivelog necessaire par script ${action_script}
-    sh ${action_script}
-else
-    echo ${pct_fra_used} : backup des archivelog non necessaire
-fi
+    # 
+    # Si la FRA dépasse la limite on lance le script
+    #
+    if [ "${pct_fra_used}" -gt ${pct_limit} ]
+    then
+        echo ${pct_fra_used} : backup des archivelog necessaire par script ${action_script}
+        sh ${action_script}
+    else
+        echo ${pct_fra_used} : backup des archivelog non necessaire
+    fi
+done