diff --git a/src/datastore_mad/remotes/ceph/ceph.conf b/src/datastore_mad/remotes/ceph/ceph.conf
index 36d4df0058..729d45c550 100644
--- a/src/datastore_mad/remotes/ceph/ceph.conf
+++ b/src/datastore_mad/remotes/ceph/ceph.conf
@@ -17,9 +17,6 @@
 # Default POOL_NAME
 POOL_NAME=one
 
-# Default Ceph server host. Storage operations will be performed in this host.
-HOST=localhost
-
 # Staging directory
 #   A directory in the Ceph server host where image will be transferred to
 #   temporarily during the create/mkfs processes. This directoy MUST exist,
diff --git a/src/datastore_mad/remotes/ceph/clone b/src/datastore_mad/remotes/ceph/clone
index a1d6b729f3..112f32cd24 100755
--- a/src/datastore_mad/remotes/ceph/clone
+++ b/src/datastore_mad/remotes/ceph/clone
@@ -53,11 +53,16 @@ done < <($XPATH     /DS_DRIVER_ACTION_DATA/DATASTORE/BASE_PATH \
 unset i
 
 BASE_PATH="${XPATH_ELEMENTS[i++]}"
-DST_HOST="${XPATH_ELEMENTS[i++]:-$HOST}"
+DST_HOST="${XPATH_ELEMENTS[i++]}"
 POOL_NAME="${XPATH_ELEMENTS[i++]:-$POOL_NAME}"
 SRC="${XPATH_ELEMENTS[i++]}"
 SIZE="${XPATH_ELEMENTS[i++]}"
 
+if [ -z "$DST_HOST" ]; then
+    error_message "Datastore template missing 'HOST' attribute."
+    exit -1
+fi
+
 SAFE_DIRS=""
 
 IMAGE_NAME="one-${ID}"
diff --git a/src/datastore_mad/remotes/ceph/cp b/src/datastore_mad/remotes/ceph/cp
index 82a295138f..08afb8dae4 100755
--- a/src/datastore_mad/remotes/ceph/cp
+++ b/src/datastore_mad/remotes/ceph/cp
@@ -66,7 +66,7 @@ unset i
 BASE_PATH="${XPATH_ELEMENTS[i++]}"
 RESTRICTED_DIRS="${XPATH_ELEMENTS[i++]}"
 SAFE_DIRS="${XPATH_ELEMENTS[i++]}"
-DST_HOST="${XPATH_ELEMENTS[i++]:-$HOST}"
+DST_HOST="${XPATH_ELEMENTS[i++]}"
 POOL_NAME="${XPATH_ELEMENTS[i++]:-$POOL_NAME}"
 STAGING_DIR="${XPATH_ELEMENTS[i++]:-$STAGING_DIR}"
 SRC="${XPATH_ELEMENTS[i++]}"
@@ -76,6 +76,11 @@ SHA1="${XPATH_ELEMENTS[i++]}"
 NO_DECOMPRESS="${XPATH_ELEMENTS[i++]}"
 LIMIT_TRANSFER_BW="${XPATH_ELEMENTS[i++]}"
 
+if [ -z "$DST_HOST" ]; then
+    error_message "Datastore template missing 'HOST' attribute."
+    exit -1
+fi
+
 set_up_datastore "$BASE_PATH" "$RESTRICTED_DIRS" "$SAFE_DIRS"
 
 IMAGE_HASH=`generate_image_hash`
diff --git a/src/datastore_mad/remotes/ceph/mkfs b/src/datastore_mad/remotes/ceph/mkfs
index e14404bf77..d86c563eb5 100755
--- a/src/datastore_mad/remotes/ceph/mkfs
+++ b/src/datastore_mad/remotes/ceph/mkfs
@@ -60,12 +60,17 @@ unset i
 BASE_PATH="${XPATH_ELEMENTS[i++]}"
 RESTRICTED_DIRS="${XPATH_ELEMENTS[i++]}"
 SAFE_DIRS="${XPATH_ELEMENTS[i++]}"
-DST_HOST="${XPATH_ELEMENTS[i++]:-$HOST}"
+DST_HOST="${XPATH_ELEMENTS[i++]}"
 POOL_NAME="${XPATH_ELEMENTS[i++]:-$POOL_NAME}"
 STAGING_DIR="${XPATH_ELEMENTS[i++]:-$STAGING_DIR}"
 FSTYPE="${XPATH_ELEMENTS[i++]}"
 SIZE="${XPATH_ELEMENTS[i++]}"
 
+if [ -z "$DST_HOST" ]; then
+    error_message "Datastore template missing 'HOST' attribute."
+    exit -1
+fi
+
 set_up_datastore "$BASE_PATH" "$RESTRICTED_DIRS" "$SAFE_DIRS"
 
 IMAGE_HASH=`generate_image_hash`
diff --git a/src/datastore_mad/remotes/ceph/monitor b/src/datastore_mad/remotes/ceph/monitor
index 6ba8e9daad..9af2359033 100755
--- a/src/datastore_mad/remotes/ceph/monitor
+++ b/src/datastore_mad/remotes/ceph/monitor
@@ -41,15 +41,20 @@ ID=$2
 
 XPATH="${DRIVER_PATH}/../xpath.rb -b $DRV_ACTION"
 
-unset i XPATH_ELEMENTS
+unset i j XPATH_ELEMENTS
 
 while IFS= read -r -d '' element; do
     XPATH_ELEMENTS[i++]="$element"
 done < <($XPATH     /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/HOST \
                     /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/POOL_NAME)
 
-HOST="${XPATH_ELEMENTS[0]:-$HOST}"
-POOL_NAME="${XPATH_ELEMENTS[1]:-$POOL_NAME}"
+HOST="${XPATH_ELEMENTS[j++]}"
+POOL_NAME="${XPATH_ELEMENTS[j++]:-$POOL_NAME}"
+
+if [ -z "$HOST" ]; then
+    error_message "Datastore template missing 'HOST' attribute."
+    exit -1
+fi
 
 # ------------ Compute datastore usage -------------
 
diff --git a/src/datastore_mad/remotes/ceph/rm b/src/datastore_mad/remotes/ceph/rm
index dbdd5cdc97..f52c06868b 100755
--- a/src/datastore_mad/remotes/ceph/rm
+++ b/src/datastore_mad/remotes/ceph/rm
@@ -50,7 +50,12 @@ done < <($XPATH     /DS_DRIVER_ACTION_DATA/IMAGE/SOURCE \
 unset i
 
 SRC="${XPATH_ELEMENTS[i++]}"
-DST_HOST="${XPATH_ELEMENTS[i++]:-$HOST}"
+DST_HOST="${XPATH_ELEMENTS[i++]}"
+
+if [ -z "$DST_HOST" ]; then
+    error_message "Datastore template missing 'HOST' attribute."
+    exit -1
+fi
 
 log "Removing $SRC from the rbd image repository in $DST_HOST"
 
diff --git a/src/datastore_mad/remotes/iscsi/clone b/src/datastore_mad/remotes/iscsi/clone
index 65e58a34f3..d1fc5b8a88 100755
--- a/src/datastore_mad/remotes/iscsi/clone
+++ b/src/datastore_mad/remotes/iscsi/clone
@@ -40,7 +40,7 @@ ID=$2
 
 XPATH="${DRIVER_PATH}/../xpath.rb -b $DRV_ACTION"
 
-unset i XPATH_ELEMENTS
+unset i j XPATH_ELEMENTS
 
 while IFS= read -r -d '' element; do
     XPATH_ELEMENTS[i++]="$element"
@@ -53,14 +53,19 @@ done < <($XPATH     /DS_DRIVER_ACTION_DATA/DATASTORE/BASE_PATH \
                     /DS_DRIVER_ACTION_DATA/IMAGE/PATH \
                     /DS_DRIVER_ACTION_DATA/IMAGE/SIZE)
 
-BASE_PATH="${XPATH_ELEMENTS[0]}"
-RESTRICTED_DIRS="${XPATH_ELEMENTS[1]}"
-SAFE_DIRS="${XPATH_ELEMENTS[2]}"
-DST_HOST="${XPATH_ELEMENTS[3]:-$HOST}"
-VG_NAME="${XPATH_ELEMENTS[4]:-$VG_NAME}"
-BASE_IQN="${XPATH_ELEMENTS[5]:-$BASE_IQN}"
-SRC="${XPATH_ELEMENTS[6]}"
-SIZE="${XPATH_ELEMENTS[7]}"
+BASE_PATH="${XPATH_ELEMENTS[j++]}"
+RESTRICTED_DIRS="${XPATH_ELEMENTS[j++]}"
+SAFE_DIRS="${XPATH_ELEMENTS[j++]}"
+DST_HOST="${XPATH_ELEMENTS[j++]}"
+VG_NAME="${XPATH_ELEMENTS[j++]:-$VG_NAME}"
+BASE_IQN="${XPATH_ELEMENTS[j++]:-$BASE_IQN}"
+SRC="${XPATH_ELEMENTS[j++]}"
+SIZE="${XPATH_ELEMENTS[j++]}"
+
+if [ -z "$DST_HOST" ]; then
+    error_message "Datastore template missing 'HOST' attribute."
+    exit -1
+fi
 
 # Check if 'TGTSETUPLUN' is installed
 tgt_setup_lun_install "$DST_HOST" "$BASE_PATH"
diff --git a/src/datastore_mad/remotes/iscsi/cp b/src/datastore_mad/remotes/iscsi/cp
index 4e6147c8b0..dfaec846a6 100755
--- a/src/datastore_mad/remotes/iscsi/cp
+++ b/src/datastore_mad/remotes/iscsi/cp
@@ -44,7 +44,7 @@ UTILS_PATH="${DRIVER_PATH}/.."
 
 XPATH="$UTILS_PATH/xpath.rb -b $DRV_ACTION"
 
-unset i XPATH_ELEMENTS
+unset i j XPATH_ELEMENTS
 
 while IFS= read -r -d '' element; do
     XPATH_ELEMENTS[i++]="$element"
@@ -61,18 +61,23 @@ done < <($XPATH     /DS_DRIVER_ACTION_DATA/DATASTORE/BASE_PATH \
                     /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/NO_DECOMPRESS \
                     /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/LIMIT_TRANSFER_BW)
 
-BASE_PATH="${XPATH_ELEMENTS[0]}"
-RESTRICTED_DIRS="${XPATH_ELEMENTS[1]}"
-SAFE_DIRS="${XPATH_ELEMENTS[2]}"
-DST_HOST="${XPATH_ELEMENTS[3]:-$HOST}"
-VG_NAME="${XPATH_ELEMENTS[4]:-$VG_NAME}"
-BASE_IQN="${XPATH_ELEMENTS[5]:-$BASE_IQN}"
-SRC="${XPATH_ELEMENTS[6]}"
-SIZE="${XPATH_ELEMENTS[7]}"
-MD5="${XPATH_ELEMENTS[8]}"
-SHA1="${XPATH_ELEMENTS[9]}"
-NO_DECOMPRESS="${XPATH_ELEMENTS[10]}"
-LIMIT_TRANSFER_BW="${XPATH_ELEMENTS[11]}"
+BASE_PATH="${XPATH_ELEMENTS[j++]}"
+RESTRICTED_DIRS="${XPATH_ELEMENTS[j++]}"
+SAFE_DIRS="${XPATH_ELEMENTS[j++]}"
+DST_HOST="${XPATH_ELEMENTS[j++]}"
+VG_NAME="${XPATH_ELEMENTS[j++]:-$VG_NAME}"
+BASE_IQN="${XPATH_ELEMENTS[j++]:-$BASE_IQN}"
+SRC="${XPATH_ELEMENTS[j++]}"
+SIZE="${XPATH_ELEMENTS[j++]}"
+MD5="${XPATH_ELEMENTS[j++]}"
+SHA1="${XPATH_ELEMENTS[j++]}"
+NO_DECOMPRESS="${XPATH_ELEMENTS[j++]}"
+LIMIT_TRANSFER_BW="${XPATH_ELEMENTS[j++]}"
+
+if [ -z "$DST_HOST" ]; then
+    error_message "Datastore template missing 'HOST' attribute."
+    exit -1
+fi
 
 # Check if 'TGTSETUPLUN' is installed
 tgt_setup_lun_install "$DST_HOST" "$BASE_PATH"
diff --git a/src/datastore_mad/remotes/iscsi/iscsi.conf b/src/datastore_mad/remotes/iscsi/iscsi.conf
index 2b56cde7e1..48130536f1 100644
--- a/src/datastore_mad/remotes/iscsi/iscsi.conf
+++ b/src/datastore_mad/remotes/iscsi/iscsi.conf
@@ -14,9 +14,6 @@
 # limitations under the License.                                             #
 #--------------------------------------------------------------------------- #
 
-# Default iSCSI target host
-HOST=localhost
-
 # Default IQN path
 BASE_IQN=iqn.2012-02.org.opennebula
 
diff --git a/src/datastore_mad/remotes/iscsi/mkfs b/src/datastore_mad/remotes/iscsi/mkfs
index 2bd077d788..3672a7df6a 100755
--- a/src/datastore_mad/remotes/iscsi/mkfs
+++ b/src/datastore_mad/remotes/iscsi/mkfs
@@ -42,7 +42,7 @@ ID=$2
 
 XPATH="${DRIVER_PATH}/../xpath.rb -b $DRV_ACTION"
 
-unset i XPATH_ELEMENTS
+unset i j XPATH_ELEMENTS
 
 while IFS= read -r -d '' element; do
     XPATH_ELEMENTS[i++]="$element"
@@ -55,14 +55,19 @@ done < <($XPATH     /DS_DRIVER_ACTION_DATA/DATASTORE/BASE_PATH \
                     /DS_DRIVER_ACTION_DATA/IMAGE/FSTYPE \
                     /DS_DRIVER_ACTION_DATA/IMAGE/SIZE)
 
-BASE_PATH="${XPATH_ELEMENTS[0]}"
-RESTRICTED_DIRS="${XPATH_ELEMENTS[1]}"
-SAFE_DIRS="${XPATH_ELEMENTS[2]}"
-DST_HOST="${XPATH_ELEMENTS[3]:-$HOST}"
-VG_NAME="${XPATH_ELEMENTS[4]:-$VG_NAME}"
-BASE_IQN="${XPATH_ELEMENTS[5]:-$BASE_IQN}"
-FSTYPE="${XPATH_ELEMENTS[6]}"
-SIZE="${XPATH_ELEMENTS[7]:-0}"
+BASE_PATH="${XPATH_ELEMENTS[j++]}"
+RESTRICTED_DIRS="${XPATH_ELEMENTS[j++]}"
+SAFE_DIRS="${XPATH_ELEMENTS[j++]}"
+DST_HOST="${XPATH_ELEMENTS[j++]}"
+VG_NAME="${XPATH_ELEMENTS[j++]:-$VG_NAME}"
+BASE_IQN="${XPATH_ELEMENTS[j++]:-$BASE_IQN}"
+FSTYPE="${XPATH_ELEMENTS[j++]}"
+SIZE="${XPATH_ELEMENTS[j++]:-0}"
+
+if [ -z "$DST_HOST" ]; then
+    error_message "Datastore template missing 'HOST' attribute."
+    exit -1
+fi
 
 # Check if 'TGTSETUPLUN' is installed
 tgt_setup_lun_install "$DST_HOST" "$BASE_PATH"
diff --git a/src/datastore_mad/remotes/iscsi/monitor b/src/datastore_mad/remotes/iscsi/monitor
index 3325f6251d..10c3929310 100755
--- a/src/datastore_mad/remotes/iscsi/monitor
+++ b/src/datastore_mad/remotes/iscsi/monitor
@@ -41,15 +41,20 @@ ID=$2
 
 XPATH="${DRIVER_PATH}/../xpath.rb -b $DRV_ACTION"
 
-unset i XPATH_ELEMENTS
+unset i j XPATH_ELEMENTS
 
 while IFS= read -r -d '' element; do
     XPATH_ELEMENTS[i++]="$element"
 done < <($XPATH     /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/HOST \
                     /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/VG_NAME)
 
-HOST="${XPATH_ELEMENTS[0]:-$HOST}"
-VG_NAME="${XPATH_ELEMENTS[1]-$VG_NAME}"
+HOST="${XPATH_ELEMENTS[j++]}"
+VG_NAME="${XPATH_ELEMENTS[j++]:-$VG_NAME}"
+
+if [ -z "$HOST" ]; then
+    error_message "Datastore template missing 'HOST' attribute."
+    exit -1
+fi
 
 # ------------ Compute datastore usage -------------
 
diff --git a/src/datastore_mad/remotes/iscsi/rm b/src/datastore_mad/remotes/iscsi/rm
index 9268c9eb38..1aa371283d 100755
--- a/src/datastore_mad/remotes/iscsi/rm
+++ b/src/datastore_mad/remotes/iscsi/rm
@@ -40,15 +40,20 @@ ID=$2
 
 XPATH="${DRIVER_PATH}/../xpath.rb -b $DRV_ACTION"
 
-unset i XPATH_ELEMENTS
+unset i j XPATH_ELEMENTS
 
 while IFS= read -r -d '' element; do
     XPATH_ELEMENTS[i++]="$element"
 done < <($XPATH     /DS_DRIVER_ACTION_DATA/IMAGE/SOURCE \
                     /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/HOST)
 
-SRC="${XPATH_ELEMENTS[0]}"
-DST_HOST="${XPATH_ELEMENTS[1]:-$HOST}"
+SRC="${XPATH_ELEMENTS[j++]}"
+DST_HOST="${XPATH_ELEMENTS[j++]}"
+
+if [ -z "$DST_HOST" ]; then
+    error_message "Datastore template missing 'HOST' attribute."
+    exit -1
+fi
 
 BASE_IQN=`echo $SRC|$CUT -d: -f1`
 TARGET=`echo $SRC|$CUT -d: -f2`
diff --git a/src/datastore_mad/remotes/lvm/clone b/src/datastore_mad/remotes/lvm/clone
index 3807fe8f31..7c99033e47 100755
--- a/src/datastore_mad/remotes/lvm/clone
+++ b/src/datastore_mad/remotes/lvm/clone
@@ -40,7 +40,7 @@ ID=$2
 
 XPATH="${DRIVER_PATH}/../xpath.rb -b $DRV_ACTION"
 
-unset i XPATH_ELEMENTS
+unset i j XPATH_ELEMENTS
 
 while IFS= read -r -d '' element; do
     XPATH_ELEMENTS[i++]="$element"
@@ -50,11 +50,16 @@ done < <($XPATH     /DS_DRIVER_ACTION_DATA/DATASTORE/BASE_PATH \
                     /DS_DRIVER_ACTION_DATA/IMAGE/PATH \
                     /DS_DRIVER_ACTION_DATA/IMAGE/SIZE)
 
-BASE_PATH="${XPATH_ELEMENTS[0]}"
-DST_HOST="${XPATH_ELEMENTS[1]:-$HOST}"
-VG_NAME="${XPATH_ELEMENTS[2]:-$VG_NAME}"
-SRC="${XPATH_ELEMENTS[3]}"
-SIZE="${XPATH_ELEMENTS[4]}"
+BASE_PATH="${XPATH_ELEMENTS[j++]}"
+DST_HOST="${XPATH_ELEMENTS[j++]}"
+VG_NAME="${XPATH_ELEMENTS[j++]:-$VG_NAME}"
+SRC="${XPATH_ELEMENTS[j++]}"
+SIZE="${XPATH_ELEMENTS[j++]}"
+
+if [ -z "$DST_HOST" ]; then
+    error_message "Datastore template missing 'HOST' attribute."
+    exit -1
+fi
 
 SAFE_DIRS=""
 
diff --git a/src/datastore_mad/remotes/lvm/cp b/src/datastore_mad/remotes/lvm/cp
index 4ec7f325f0..7c9d95b0dd 100755
--- a/src/datastore_mad/remotes/lvm/cp
+++ b/src/datastore_mad/remotes/lvm/cp
@@ -44,7 +44,7 @@ UTILS_PATH="${DRIVER_PATH}/.."
 
 XPATH="$UTILS_PATH/xpath.rb -b $DRV_ACTION"
 
-unset i XPATH_ELEMENTS
+unset i j XPATH_ELEMENTS
 
 while IFS= read -r -d '' element; do
     XPATH_ELEMENTS[i++]="$element"
@@ -60,17 +60,22 @@ done < <($XPATH     /DS_DRIVER_ACTION_DATA/DATASTORE/BASE_PATH \
                     /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/NO_DECOMPRESS \
                     /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/LIMIT_TRANSFER_BW)
 
-BASE_PATH="${XPATH_ELEMENTS[0]}"
-RESTRICTED_DIRS="${XPATH_ELEMENTS[1]}"
-SAFE_DIRS="${XPATH_ELEMENTS[2]}"
-DST_HOST="${XPATH_ELEMENTS[3]:-$HOST}"
-VG_NAME="${XPATH_ELEMENTS[4]:-$VG_NAME}"
-SRC="${XPATH_ELEMENTS[5]}"
-SIZE="${XPATH_ELEMENTS[6]}"
-MD5="${XPATH_ELEMENTS[7]}"
-SHA1="${XPATH_ELEMENTS[8]}"
-NO_DECOMPRESS="${XPATH_ELEMENTS[9]}"
-LIMIT_TRANSFER_BW="${XPATH_ELEMENTS[10]}"
+BASE_PATH="${XPATH_ELEMENTS[j++]}"
+RESTRICTED_DIRS="${XPATH_ELEMENTS[j++]}"
+SAFE_DIRS="${XPATH_ELEMENTS[j++]}"
+DST_HOST="${XPATH_ELEMENTS[j++]}"
+VG_NAME="${XPATH_ELEMENTS[j++]:-$VG_NAME}"
+SRC="${XPATH_ELEMENTS[j++]}"
+SIZE="${XPATH_ELEMENTS[j++]}"
+MD5="${XPATH_ELEMENTS[j++]}"
+SHA1="${XPATH_ELEMENTS[j++]}"
+NO_DECOMPRESS="${XPATH_ELEMENTS[j++]}"
+LIMIT_TRANSFER_BW="${XPATH_ELEMENTS[j++]}"
+
+if [ -z "$DST_HOST" ]; then
+    error_message "Datastore template missing 'HOST' attribute."
+    exit -1
+fi
 
 set_up_datastore "$BASE_PATH" "$RESTRICTED_DIRS" "$SAFE_DIRS"
 
diff --git a/src/datastore_mad/remotes/lvm/lvm.conf b/src/datastore_mad/remotes/lvm/lvm.conf
index c063085ade..9e2874ead6 100644
--- a/src/datastore_mad/remotes/lvm/lvm.conf
+++ b/src/datastore_mad/remotes/lvm/lvm.conf
@@ -17,8 +17,5 @@
 # Default volume group
 VG_NAME=vg-one
 
-# Default LVM server host
-HOST=localhost
-
 # Default LV snapshot SIZE
 DEFAULT_SIZE=512
diff --git a/src/datastore_mad/remotes/lvm/mkfs b/src/datastore_mad/remotes/lvm/mkfs
index 4f8f2c56ef..3f28dcef97 100755
--- a/src/datastore_mad/remotes/lvm/mkfs
+++ b/src/datastore_mad/remotes/lvm/mkfs
@@ -42,7 +42,7 @@ ID=$2
 
 XPATH="${DRIVER_PATH}/../xpath.rb -b $DRV_ACTION"
 
-unset i XPATH_ELEMENTS
+unset i j XPATH_ELEMENTS
 
 while IFS= read -r -d '' element; do
     XPATH_ELEMENTS[i++]="$element"
@@ -54,13 +54,18 @@ done < <($XPATH     /DS_DRIVER_ACTION_DATA/DATASTORE/BASE_PATH \
                     /DS_DRIVER_ACTION_DATA/IMAGE/FSTYPE \
                     /DS_DRIVER_ACTION_DATA/IMAGE/SIZE)
 
-BASE_PATH="${XPATH_ELEMENTS[0]}"
-RESTRICTED_DIRS="${XPATH_ELEMENTS[1]}"
-SAFE_DIRS="${XPATH_ELEMENTS[2]}"
-DST_HOST="${XPATH_ELEMENTS[3]:-$HOST}"
-VG_NAME="${XPATH_ELEMENTS[4]:-$VG_NAME}"
-FSTYPE="${XPATH_ELEMENTS[5]}"
-SIZE="${XPATH_ELEMENTS[6]}"
+BASE_PATH="${XPATH_ELEMENTS[j++]}"
+RESTRICTED_DIRS="${XPATH_ELEMENTS[j++]}"
+SAFE_DIRS="${XPATH_ELEMENTS[j++]}"
+DST_HOST="${XPATH_ELEMENTS[j++]}"
+VG_NAME="${XPATH_ELEMENTS[j++]:-$VG_NAME}"
+FSTYPE="${XPATH_ELEMENTS[j++]}"
+SIZE="${XPATH_ELEMENTS[j++]}"
+
+if [ -z "$DST_HOST" ]; then
+    error_message "Datastore template missing 'HOST' attribute."
+    exit -1
+fi
 
 set_up_datastore "$BASE_PATH" "$RESTRICTED_DIRS" "$SAFE_DIRS"
 
diff --git a/src/datastore_mad/remotes/lvm/monitor b/src/datastore_mad/remotes/lvm/monitor
index ddbe61e7a5..f2f356ee24 100755
--- a/src/datastore_mad/remotes/lvm/monitor
+++ b/src/datastore_mad/remotes/lvm/monitor
@@ -41,16 +41,20 @@ ID=$2
 
 XPATH="${DRIVER_PATH}/../xpath.rb -b $DRV_ACTION"
 
-unset i XPATH_ELEMENTS
+unset i j XPATH_ELEMENTS
 
 while IFS= read -r -d '' element; do
     XPATH_ELEMENTS[i++]="$element"
 done < <($XPATH     /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/HOST \
                     /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/VG_NAME)
 
-HOST="${XPATH_ELEMENTS[0]:-$HOST}"
-VG_NAME="${XPATH_ELEMENTS[1]-$VG_NAME}"
+HOST="${XPATH_ELEMENTS[j++]}"
+VG_NAME="${XPATH_ELEMENTS[j++]:-$VG_NAME}"
 
+if [ -z "$HOST" ]; then
+    error_message "Datastore template missing 'HOST' attribute."
+    exit -1
+fi
 # ------------ Compute datastore usage -------------
 
 MONITOR_SCRIPT=$(cat <<EOF
diff --git a/src/datastore_mad/remotes/lvm/rm b/src/datastore_mad/remotes/lvm/rm
index ba629cd015..7543df6e5d 100755
--- a/src/datastore_mad/remotes/lvm/rm
+++ b/src/datastore_mad/remotes/lvm/rm
@@ -40,25 +40,26 @@ ID=$2
 
 XPATH="${DRIVER_PATH}/../xpath.rb -b $DRV_ACTION"
 
-unset i XPATH_ELEMENTS
+unset i j XPATH_ELEMENTS
 
 while IFS= read -r -d '' element; do
     XPATH_ELEMENTS[i++]="$element"
 done < <($XPATH     /DS_DRIVER_ACTION_DATA/IMAGE/SOURCE \
-                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/HOST \
-                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/BASE_TID)
+                    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/HOST)
 
-SRC="${XPATH_ELEMENTS[0]}"
-DST_HOST="${XPATH_ELEMENTS[1]:-$HOST}"
-BASE_TID="${XPATH_ELEMENTS[2]:-$BASE_TID}"
+SRC="${XPATH_ELEMENTS[j++]}"
+DST_HOST="${XPATH_ELEMENTS[j++]}"
+
+if [ -z "$DST_HOST" ]; then
+    error_message "Datastore template missing 'HOST' attribute."
+    exit -1
+fi
 
 TARGET=`echo $SRC|$CUT -d: -f2`
 LV_NAME=`echo $TARGET|$AWK -F. '{print $(NF)}'`
 VG_NAME=`echo $TARGET|$AWK -F. '{print $(NF-1)}'`
 DEV="/dev/$VG_NAME/$LV_NAME"
 
-let TID=ID+BASE_TID
-
 RM_COMMAND=$(cat <<EOF
     $SUDO $LVREMOVE -f $VG_NAME/$LV_NAME
 EOF
diff --git a/src/tm_mad/ceph/clone b/src/tm_mad/ceph/clone
index 25a8d96401..995f541744 100755
--- a/src/tm_mad/ceph/clone
+++ b/src/tm_mad/ceph/clone
@@ -57,6 +57,11 @@ unset i
 
 CEPH_HOST="${XPATH_ELEMENTS[i++]}"
 
+if [ -z "$CEPH_HOST" ]; then
+    error_message "Datastore template missing 'HOST' attribute."
+    exit -1
+fi
+
 #-------------------------------------------------------------------------------
 # Compute the destination image name
 #-------------------------------------------------------------------------------
diff --git a/src/tm_mad/iscsi/cpds b/src/tm_mad/iscsi/cpds
index 15706507a1..7402ad67dd 100755
--- a/src/tm_mad/iscsi/cpds
+++ b/src/tm_mad/iscsi/cpds
@@ -53,7 +53,7 @@ DISK_ID=$(echo $SRC|awk -F. '{print $NF}')
 
 XPATH="${DRIVER_PATH}/../../datastore/xpath.rb --stdin"
 
-unset i XPATH_ELEMENTS
+unset i j XPATH_ELEMENTS
 
 while IFS= read -r -d '' element; do
     XPATH_ELEMENTS[i++]="$element"
@@ -62,9 +62,9 @@ done < <(onevm show -x $VMID| $XPATH \
                     /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/SAVE_AS \
                     /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/PERSISTENT)
 
-IQN="${XPATH_ELEMENTS[0]}"
-SAVE_AS="${XPATH_ELEMENTS[1]}"
-PERSISTENT="${XPATH_ELEMENTS[2]}"
+IQN="${XPATH_ELEMENTS[j++]}"
+SAVE_AS="${XPATH_ELEMENTS[j++]}"
+PERSISTENT="${XPATH_ELEMENTS[j++]}"
 
 if [ -z "$PERSISTENT" ]; then
     IQN=$IQN-$VMID
diff --git a/src/tm_mad/iscsi/delete b/src/tm_mad/iscsi/delete
index b8184494ba..c95070c232 100755
--- a/src/tm_mad/iscsi/delete
+++ b/src/tm_mad/iscsi/delete
@@ -54,7 +54,7 @@ DISK_ID=$(echo "$DST_PATH" | $AWK -F. '{print $NF}')
 
 XPATH="${DRIVER_PATH}/../../datastore/xpath.rb --stdin"
 
-unset i XPATH_ELEMENTS
+unset i j XPATH_ELEMENTS
 
 while IFS= read -r -d '' element; do
     XPATH_ELEMENTS[i++]="$element"
@@ -62,8 +62,8 @@ done < <(onevm show -x $VMID| $XPATH \
                     /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/SOURCE \
                     /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/PERSISTENT)
 
-IQN="${XPATH_ELEMENTS[0]}"
-PERSISTENT="${XPATH_ELEMENTS[1]}"
+IQN="${XPATH_ELEMENTS[j++]}"
+PERSISTENT="${XPATH_ELEMENTS[j++]}"
 
 if [ -z "$PERSISTENT" ]; then
     NEW_IQN=$IQN-$VMID
diff --git a/src/tm_mad/iscsi/mv b/src/tm_mad/iscsi/mv
index 7e33033d13..007086ab27 100755
--- a/src/tm_mad/iscsi/mv
+++ b/src/tm_mad/iscsi/mv
@@ -76,7 +76,7 @@ fi
 
 XPATH="${DRIVER_PATH}/../../datastore/xpath.rb --stdin"
 
-unset i XPATH_ELEMENTS
+unset i j XPATH_ELEMENTS
 
 DISK_ID=$(echo "$SRC_PATH" | $AWK -F. '{print $NF}')
 
@@ -86,8 +86,8 @@ done < <(onevm show -x $VMID| $XPATH \
                     /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/SOURCE \
                     /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/PERSISTENT)
 
-IQN="${XPATH_ELEMENTS[0]}"
-PERSISTENT="${XPATH_ELEMENTS[1]}"
+IQN="${XPATH_ELEMENTS[j++]}"
+PERSISTENT="${XPATH_ELEMENTS[j++]}"
 
 if [ -z "$PERSISTENT" ]; then
     IQN=$IQN-$VMID
diff --git a/src/tm_mad/iscsi/mvds b/src/tm_mad/iscsi/mvds
index 80ac6ef24f..8c70a0d686 100755
--- a/src/tm_mad/iscsi/mvds
+++ b/src/tm_mad/iscsi/mvds
@@ -53,7 +53,7 @@ DISK_ID=$(echo $SRC|awk -F. '{print $NF}')
 
 XPATH="${DRIVER_PATH}/../../datastore/xpath.rb --stdin"
 
-unset i XPATH_ELEMENTS
+unset i j XPATH_ELEMENTS
 
 while IFS= read -r -d '' element; do
     XPATH_ELEMENTS[i++]="$element"
@@ -62,9 +62,9 @@ done < <(onevm show -x $VMID| $XPATH \
                     /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/SAVE_AS \
                     /VM/TEMPLATE/DISK[DISK_ID=$DISK_ID]/PERSISTENT)
 
-IQN="${XPATH_ELEMENTS[0]}"
-SAVE_AS="${XPATH_ELEMENTS[1]}"
-PERSISTENT="${XPATH_ELEMENTS[2]}"
+IQN="${XPATH_ELEMENTS[j++]}"
+SAVE_AS="${XPATH_ELEMENTS[j++]}"
+PERSISTENT="${XPATH_ELEMENTS[j++]}"
 
 if [ -z "$PERSISTENT" ]; then
     IQN=$IQN-$VMID