diff --git a/nova_dpm/tests/unit/virt/dpm/test_block_device.py b/nova_dpm/tests/unit/virt/dpm/test_block_device.py
new file mode 100644
index 0000000..2ca0983
--- /dev/null
+++ b/nova_dpm/tests/unit/virt/dpm/test_block_device.py
@@ -0,0 +1,61 @@
+# Copyright 2018 IBM Corp. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from nova.test import TestCase
+
+from nova_dpm.virt.dpm.block_device import BlockDevice
+from nova_dpm.virt.dpm import exceptions
+
+PARTITION_WWPN = 'CCCCCCCCCCCCCCCC'
+LUN = 0
+BLOCK_DEVICE = {
+    'connection_info': {
+        'driver_volume_type': 'fibre_channel',
+        'connector': {
+            'wwpns': [PARTITION_WWPN],
+            'host': '3cfb165c-0df3-4d80-87b2-4c353e61318f'},
+        'data': {
+            'initiator_target_map': {
+                PARTITION_WWPN: [
+                    'AAAAAAAAAAAAAAAA',
+                    'BBBBBBBBBBBBBBBB']},
+            'target_discovered': False,
+            'target_lun': LUN}}}
+
+
+class BlockDeviceTest(TestCase):
+
+    def test_volume_type_unsupported(self):
+        bd = {'connection_info': {'driver_volume_type': 'fake_vol_type'}}
+        try:
+            BlockDevice(bd)
+        except exceptions.UnsupportedVolumeTypeException:
+            pass
+        else:
+            self.fail("UnsupportedVolumeTypeException not raised.")
+
+    def test_volume_type_fc_supported(self):
+        bd = {'connection_info': {'driver_volume_type': 'fibre_channel'}}
+        bd_obj = BlockDevice(bd)
+        self.assertIsNotNone(bd_obj)
+
+    def test_get_target_wwpn(self):
+        bd = BlockDevice(BLOCK_DEVICE)
+        self.flags(group="dpm", target_wwpn_ignore_list=["AAAAAAAAAAAAAAAA"])
+        self.assertEqual("BBBBBBBBBBBBBBBB",
+                         bd.get_target_wwpn(PARTITION_WWPN))
+
+    def test_lun(self):
+        bd = BlockDevice(BLOCK_DEVICE)
+        self.assertEqual(str(LUN), bd.lun)
diff --git a/nova_dpm/virt/dpm/block_device.py b/nova_dpm/virt/dpm/block_device.py
new file mode 100644
index 0000000..24497c7
--- /dev/null
+++ b/nova_dpm/virt/dpm/block_device.py
@@ -0,0 +1,61 @@
+# Copyright 2018 IBM Corp. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from nova_dpm import conf
+from nova_dpm.virt.dpm import exceptions
+
+CONF = conf.CONF
+
+
+class BlockDevice(object):
+    def __init__(self, block_device):
+        self.bd = block_device
+        self._validate_volume_type()
+
+    def _validate_volume_type(self):
+        vol_type = self.bd['connection_info']['driver_volume_type']
+        if vol_type != 'fibre_channel':
+            raise exceptions.UnsupportedVolumeTypeException(
+                vol_type=vol_type)
+
+    @property
+    def host_wwpns(self):
+        return self.bd['connection_info']['connector']['wwpns']
+
+    def get_target_wwpn(self, partition_wwpn):
+        if partition_wwpn not in self.host_wwpns:
+            raise Exception('Partition WWPN not found from cinder')
+
+        bd_target_wwpns = (
+            self.bd['connection_info']['data']['initiator_target_map']
+            [partition_wwpn])
+
+        # Some storage systems return a complete list of target WWPNs on
+        # cinders request. Only some of them might be available in our FC
+        # network. Therefore we need to filter out the invalid ones. The user
+        # defines the invalid ones via a config setting.
+        valid_target_wwpns = [
+            wwpn for wwpn in bd_target_wwpns
+            if wwpn not in CONF.dpm.target_wwpn_ignore_list]
+
+        # target_wwpns is a list of wwpns which will be accessible
+        # from host wwpn. So we can use any of the target wwpn in the
+        # list.
+        target_wwpn = (valid_target_wwpns[0]
+                       if len(valid_target_wwpns) > 0 else '')
+        return target_wwpn
+
+    @property
+    def lun(self):
+        return str(self.bd['connection_info']['data']['target_lun'])