diff --git a/virttest/virt_storage/backend/base.py b/virttest/virt_storage/backend/base.py
index 154c8c2d323..aba950c6383 100644
--- a/virttest/virt_storage/backend/base.py
+++ b/virttest/virt_storage/backend/base.py
@@ -127,7 +127,16 @@ def acquire_volume(self, volume):
         self.refresh()
 
     def info(self):
-        return utils.get_instance_info(self)
+        out = dict()
+        out["name"] = self.name
+        out["uuid"] = str(self.uuid)
+        out["source"] = str(self.source)
+        out["target"] = str(self.target)
+        out["capacity"] = str(self.capacity)
+        out["available"] = str(self.available)
+        out["helper"] = str(self.helper)
+        out["volumes"] = list(map(str, self._volumes))
+        return out
 
     def __str__(self):
         return "%s:%s" % (self.__class__.__name__, self.name)
diff --git a/virttest/virt_storage/backend/direct_iscsi.py b/virttest/virt_storage/backend/direct_iscsi.py
index 91eaa01339e..19eae3317ef 100644
--- a/virttest/virt_storage/backend/direct_iscsi.py
+++ b/virttest/virt_storage/backend/direct_iscsi.py
@@ -63,4 +63,5 @@ def __find_appropriate_lun(self, vol):
 
     @property
     def available(self):
-        return sum(filter(lambda x: x.url and x.name is None, self._volumes))
+        free_voluems = filter(lambda x: x.is_allocated and x.name is None, self._volumes)
+        return sum(map(lambda x: x.capacity, free_voluems))
diff --git a/virttest/virt_storage/backend/directory.py b/virttest/virt_storage/backend/directory.py
index 9fec8fd0a7c..a6367c74ae6 100644
--- a/virttest/virt_storage/backend/directory.py
+++ b/virttest/virt_storage/backend/directory.py
@@ -40,8 +40,6 @@ def create_volume_from_local(self, path):
         return volume
 
     def create_volume(self, volume):
-        if volume.path is None:
-            volume.path = self.helper.get_path_by_name(volume.name)
         storage_util.create_volume(volume)
         volume.is_allocated = True
         return volume
diff --git a/virttest/virt_storage/backend/gluster.py b/virttest/virt_storage/backend/gluster.py
index 6854fbac032..7c73a033e85 100644
--- a/virttest/virt_storage/backend/gluster.py
+++ b/virttest/virt_storage/backend/gluster.py
@@ -24,9 +24,6 @@ def remove_volume(self, volume):
         self._volumes.remove(volume)
 
     def create_volume(self, volume):
-        if volume.url is None:
-            url = self.helper.get_url_by_name(volume.name)
-            volume.url = volume.path = url
         storage_util.create_volume(volume)
         volume.is_allocated = True
         return volume
diff --git a/virttest/virt_storage/backend/nfs.py b/virttest/virt_storage/backend/nfs.py
index 4271f85dbba..b10f752e7d4 100644
--- a/virttest/virt_storage/backend/nfs.py
+++ b/virttest/virt_storage/backend/nfs.py
@@ -27,19 +27,16 @@ def refresh(self):
         return map(self.create_volume_from_remote, urls)
 
     def create_volume_from_remote(self, url):
+        path = self.helper.url_to_path(url)
+        capacity = self.helper.get_size(path)
         volume = storage_volume.StorageVolume(self)
         volume.url = url
-        volume.path = self.helper.url_to_path(url)
-        volume.capacity = self.helper.get_size(volume.path)
+        volume.path = path
+        volume.capacity = capacity
         volume.is_allocated = True
         return volume
 
     def create_volume(self, volume):
-        if volume.url is None:
-            url = self.helper.get_url_by_name(volume.name)
-            volume.url = url
-            path = self.helper.url_to_path(volume.url)
-            volume.path = path
         storage_util.create_volume(volume)
         volume.is_allocated = True
         return volume
diff --git a/virttest/virt_storage/backend/rbd.py b/virttest/virt_storage/backend/rbd.py
index a663de8272c..747e410f431 100755
--- a/virttest/virt_storage/backend/rbd.py
+++ b/virttest/virt_storage/backend/rbd.py
@@ -28,9 +28,6 @@ def create_volume_from_remote(self, url):
         return volume
 
     def create_volume(self, volume):
-        if volume.url is None:
-            url = self.helper.get_url_by_name(volume.name)
-            volume.url = volume.path = url
         if volume.is_allocated:
             self.helper.remove_image(volume.url)
         storage_util.create_volume(volume)
diff --git a/virttest/virt_storage/helper/fscli.py b/virttest/virt_storage/helper/fscli.py
index 3da9a5b8fc2..6b3909ae354 100755
--- a/virttest/virt_storage/helper/fscli.py
+++ b/virttest/virt_storage/helper/fscli.py
@@ -1,4 +1,3 @@
-import logging
 import os
 import shutil
 
@@ -14,12 +13,11 @@ class FsCli(object):
     def __init__(self, dir_path):
         self.dir_path = dir_path
         self._is_export = None
+        self._protocol = r"file://"
 
     def create(self):
         if not self.is_exists:
             os.makedirs(self.dir_path)
-        else:
-            logging.warn("Dir '%s' is exists!" % self.dir_path)
         self._is_export = True
 
     def remove(self):
@@ -32,7 +30,12 @@ def remove_file(path):
         return process.system("rm -f %s" % path, shell=True)
 
     def get_path_by_name(self, name):
-        return os.path.join(self.dir_path, name)
+        path = os.path.join(self.dir_path, name)
+        return os.path.realpath(path)
+
+    def get_url_by_name(self, name):
+        path = self.get_path_by_name(name)
+        return self.path_to_url(path)
 
     def list_files(self, _root=None):
         """List all files in top directory"""
@@ -40,7 +43,8 @@ def list_files(self, _root=None):
         def _list_files(_dir):
             for root, dirs, files in os.walk(_dir):
                 for f in files:
-                    yield os.path.join(root, f)
+                    path = os.path.join(root, f)
+                    yield os.path.realpath(path)
                 for d in dirs:
                     _d = os.path.join(root, d)
                     _list_files(_d)
@@ -49,22 +53,19 @@ def _list_files(_dir):
         return _list_files(root_dir)
 
     @staticmethod
-    def get_size(f):
+    def get_size(path):
         """Get file size"""
         try:
-            return os.path.getsize(f)
+            return os.path.getsize(path)
         except OSError:
             return 0
 
-    @staticmethod
-    def url_to_path(f):
-        """Get file real-path"""
-        return os.path.realpath(f)
-
-    @staticmethod
-    def path_to_url(f):
+    def path_to_url(self, path):
         """Get url schema path"""
-        return "file://%s" % os.path.realpath(f)
+        return "%s%s" % (self._protocol, os.path.realpath(path))
+
+    def url_to_path(self, url):
+        return url[len(self._protocol):]
 
     @property
     def is_exists(self):
diff --git a/virttest/virt_storage/helper/glustercli.py b/virttest/virt_storage/helper/glustercli.py
index 41a1f574132..77b097a4a58 100755
--- a/virttest/virt_storage/helper/glustercli.py
+++ b/virttest/virt_storage/helper/glustercli.py
@@ -51,12 +51,6 @@ def get_size(self, url):
         except OSError:
             return 0
 
-    def refresh(self):
-        if self.volume.mounted:
-            self.volume.umount()
-        self.volume.mount()
-        self.volume.umount()
-
     def mount(self):
         if not self.is_mounted:
             self.volume.mount()
diff --git a/virttest/virt_storage/helper/iscsicli.py b/virttest/virt_storage/helper/iscsicli.py
index 12d24cc4e4c..b0bd77fbd23 100755
--- a/virttest/virt_storage/helper/iscsicli.py
+++ b/virttest/virt_storage/helper/iscsicli.py
@@ -15,7 +15,7 @@ def get_pool_helper(pool):
 
 
 class IscsiCli(object):
-    dev_root = '/dev/disk/by-path/'
+    dev_root = '/dev/disk/by-path'
     initiator_file = "/etc/iscsi/initiatorname.iscsi"
     iscsi_service = service.SpecificServiceManager("iscsi")
 
@@ -108,6 +108,16 @@ def path_to_url(self, path):
 
         return None
 
+    def url_to_path(self, url):
+        match = re.search(r"iscsi://(?P<secret>.*)@(?P<portoal>.*)/(?P<target>.*)/(?P<lun>\d+)", url)
+        if match:
+            portal = match.groupdict()['portal']
+            target = match.groupdict()['target']
+            lun = match.groupdict()['lun']
+            name = "ip-%s-iscsi-%s-lun-%s" % (portal, target, lun)
+            return "%s/%s" % (self.dev_root, name)
+        return None
+
     @property
     def is_logged(self):
         if self._is_logged_in is None:
diff --git a/virttest/virt_storage/helper/nfscli.py b/virttest/virt_storage/helper/nfscli.py
index bb5681f751e..f76f9503cff 100755
--- a/virttest/virt_storage/helper/nfscli.py
+++ b/virttest/virt_storage/helper/nfscli.py
@@ -21,6 +21,7 @@ def __init__(self, host, dir_path, target=None):
         self._target = target
         self._is_mounted = None
         self._is_export = None
+        self._protocol = r"nfs://"
         super(NfsCli, self).__init__(self.target)
 
     @property
@@ -66,13 +67,13 @@ def mount(self):
         self._is_mounted = True
 
     def path_to_url(self, f):
-        return f.replace(self.target, "nfs://%s" % self.src_path)
+        return f.replace(self.target, "%s%s" % (self._protocol, self.src_path))
 
     def url_to_path(self, url):
-        return url.replace("nfs://%s" % self.src_path, self.target)
+        return url.replace("%s%s" % (self._protocol, self.src_path), self.target)
 
     def get_url_by_name(self, name):
-        return "nfs://%s/%s" % (self.src_path, name)
+        return "%s%s/%s" % (self._protocol, self.src_path, name)
 
     @property
     def is_export(self):
diff --git a/virttest/virt_storage/helper/rbdcli.py b/virttest/virt_storage/helper/rbdcli.py
index 554d4b43491..a872001c527 100755
--- a/virttest/virt_storage/helper/rbdcli.py
+++ b/virttest/virt_storage/helper/rbdcli.py
@@ -31,7 +31,8 @@ def __init__(self, conffile, conf, pool):
         self.cluster = rados.Rados(conffile=conffile, conf=conf)
         self._pool = pool
         self._is_connect = False
-        self._base_url = "rbd:%s/" % self._pool
+        self._protocol = "rbd:"
+        self._base_url = "%s%s/" % (self._protocol, self._pool)
 
     def list_images(self):
         self.connect()
@@ -43,6 +44,11 @@ def list_images(self):
     def get_url_by_name(self, image):
         return "%s%s" % (self._base_url, image)
 
+    def url_to_path(self, url):
+        if url.startswith(self._protocol):
+            return url[len(self._protocol):]
+        return url
+
     def get_size(self, image):
         if not self.is_image_exists(image):
             return 0
diff --git a/virttest/virt_storage/storage_volume.py b/virttest/virt_storage/storage_volume.py
index 761172e75f4..4e177e633ad 100755
--- a/virttest/virt_storage/storage_volume.py
+++ b/virttest/virt_storage/storage_volume.py
@@ -1,5 +1,4 @@
 from virttest import utils_misc
-from virttest.virt_storage import utils
 
 
 class StorageVolume(object):
@@ -7,19 +6,43 @@ class StorageVolume(object):
     def __init__(self, pool, name=None, _format="raw"):
         self.name = name
         self.pool = pool
-        self.url = None
-        self.path = None
-        self.format = _format
+        self._url = None
+        self._path = None
         self._capacity = None
         self._backing_store = None
         self._key = None
         self._auth = None
+        self.format = _format
         self.is_allocated = None
         self.encryption = None
         self.preallocation = None
         self.used_by = []
         self.pool.add_volume(self)
 
+    @property
+    def url(self):
+        if self._url is None:
+            if self.name and hasattr(self.pool.helper, "get_url_by_name"):
+                url = self.pool.helper.get_url_by_name(self.name)
+                self._url = url
+        return self._url
+
+    @url.setter
+    def url(self, url):
+        self._url = url
+
+    @property
+    def path(self):
+        if self._path is None:
+            if self.url and hasattr(self.pool.helper, "url_to_path"):
+                path = self.pool.helper.url_to_path(self.url)
+                self._path = path
+        return self._path
+
+    @path.setter
+    def path(self, path):
+        self._path = path
+
     @property
     def key(self):
         if self._key is None:
@@ -36,9 +59,8 @@ def key(self, key):
     @property
     def capacity(self):
         if self._capacity is None:
-            if self.key:
-                driver = self.pool.helper
-                self._capacity = driver.get_size(self.key)
+            if self.key and hasattr(self.pool.helper, "get_size"):
+                self._capacity = self.pool.get_size(self.key)
         return int(self._capacity)
 
     @capacity.setter
@@ -61,11 +83,24 @@ def backing_store(self, backing):
     @property
     def auth(self):
         if self._auth is None:
-            self._auth = self.pool.source.auth
+            if self.pool.source:
+                self._auth = self.pool.source.auth
         return self._auth
 
     def info(self):
-        return utils.get_instance_info(self)
+        out = dict()
+        out["name"] = self.name
+        out["pool"] = str(self.pool)
+        out["url"] = self.url
+        out["path"] = self.path
+        out["key"] = self.key
+        out["format"] = self.format
+        out["auth"] = str(self.auth)
+        out["capacity"] = self.capacity
+        out["backing_store"] = str(self.backing_store)
+        out["encryption"] = str(self.encryption)
+        out["preallocation"] = self.preallocation
+        return out
 
     def generate_qemu_img_options(self):
         options = " -f %s" % self.format
diff --git a/virttest/virt_storage/unit_test.py b/virttest/virt_storage/unit_test.py
index b7705ba8cf4..5a7e92be8aa 100755
--- a/virttest/virt_storage/unit_test.py
+++ b/virttest/virt_storage/unit_test.py
@@ -128,7 +128,23 @@ def test_05_acqurie_volume(self):
             unittest.TestCase.assertTrue(self, volume.is_allocated,
                                          "volume(%s) is_allocated value mismatch!" % volume.name)
 
-    def test_06_find_pool_by_volume(self):
+    def test_06_compare_volume_info_img1(self):
+        img1 = sp_admin.get_volume_by_name("img1")
+        info1 = {'capacity': 104857600, 'name': 'img1', 'format': 'qcow2', 'url': 'file:///tmp/avocado/img1',
+                 'encryption': 'None', 'auth': 'None', 'backing_store': 'StorageVolume: img4, /tmp/avocado/img4',
+                 'preallocation': 'off', 'key': '/tmp/avocado/img1', 'path': '/tmp/avocado/img1',
+                 'pool': 'DirectoryPool:sp1'}
+        unittest.TestCase.assertEqual(self, info1, img1.info(), "Volume info of 'img1' mismatch!")
+
+    def test_06_compare_volume_info_img4(self):
+        img = sp_admin.get_volume_by_name("img4")
+        info = {'capacity': 104857600, 'name': 'img4', 'format': 'qcow2', 'url': 'file:///tmp/avocado/img4',
+                'encryption': 'VolumeEncryption: luks', 'auth': 'None',
+                'backing_store': 'StorageVolume: img5, /tmp/avocado/img5', 'preallocation': 'off',
+                'key': '/tmp/avocado/img4', 'path': '/tmp/avocado/img4', 'pool': 'DirectoryPool:sp1'}
+        unittest.TestCase.assertEqual(self, info, img.info(), "Volume info of 'img4' mismatch!")
+
+    def test_07_find_pool_by_volume(self):
         for volume in sp_admin.list_volumes():
             if volume.name:
                 pool = sp_admin.find_pool_by_volume(volume)
@@ -137,7 +153,7 @@ def test_06_find_pool_by_volume(self):
                 unittest.TestCase.assertEqual(
                     self, pool.name, pool_name, "pool name mismatch!")
 
-    def test_07_find_volume_by_key(self):
+    def test_08_find_volume_by_key(self):
         path_img1 = "/tmp/avocado/img1"
         unittest.TestCase.assertIsNotNone(
             self,
@@ -151,20 +167,20 @@ def test_07_find_volume_by_key(self):
                                       sp_admin.get_volume_by_name("img1"),
                                       "volumes are not same!")
 
-    def test_08_find_pool_by_path(self):
+    def test_09_find_pool_by_path(self):
         path = "/tmp/avocado"
         pool = sp_admin.find_pool_by_path(path)
         unittest.TestCase.assertEqual(
             self, "sp1", pool.name, "can not found pool by path!")
 
-    def test_09_remove_volume(self):
+    def test_10_remove_volume(self):
         for volume in sp_admin.list_volumes():
             if volume.is_allocated:
                 sp_admin.remove_volume(volume)
                 unittest.TestCase.assertNotIn(self, volume, sp_admin.list_volumes(),
                                               "Volume (%s) is exists!" % volume.name)
 
-    def test_10_stop_pool(self):
+    def test_11_stop_pool(self):
         for pool in sp_admin.list_pools():
             sp_admin.stop_pool(pool)
             unittest.TestCase.assertEqual(
@@ -174,7 +190,7 @@ def test_10_stop_pool(self):
                 "pool (%s) state mismatch" %
                 pool.name)
 
-    def test_11_destory_pool(self):
+    def test_12_destory_pool(self):
         for pool in sp_admin.list_pools():
             sp_admin.destroy_pool(pool)
             unittest.TestCase.assertEqual(
diff --git a/virttest/virt_storage/utils/__init__.py b/virttest/virt_storage/utils/__init__.py
index 556e29f438e..319d357a427 100755
--- a/virttest/virt_storage/utils/__init__.py
+++ b/virttest/virt_storage/utils/__init__.py
@@ -21,30 +21,3 @@ def get_pool_helper(pool):
     func = getattr(driver, func_name)
     return func(pool)
 
-
-def get_instance_info(inst):
-    _info = dict()
-    for key, val in vars(inst).items():
-        # skip method
-        if callable(val):
-            continue
-        # skip private attributes
-        if key.startswith("_"):
-            key = key.lstrip("_")
-            if hasattr(inst, key):
-                _info[key] = getattr(inst, key)
-            continue
-
-        if isinstance(val, list):
-            val = list(map(str, val))
-            _info[key] = val
-            continue
-        elif isinstance(val, dict):
-            for k, v in val.items():
-                val[k] = str(v)
-            _info[key] = val
-            continue
-        else:
-            _info[key] = str(val)
-            continue
-    return _info
diff --git a/virttest/virt_storage/virt_encryption.py b/virttest/virt_storage/virt_encryption.py
index e49c27ef8b2..50d4c1e870e 100755
--- a/virttest/virt_storage/virt_encryption.py
+++ b/virttest/virt_storage/virt_encryption.py
@@ -7,6 +7,9 @@ def __init__(self, encrypt_format=None, secret=None):
         self.format = encrypt_format
         self.secret = secret
 
+    def __str__(self):
+        return "%s: %s" % (self.__class__.__name__, self.format)
+
     @classmethod
     def encryption_define_by_params(cls, params):
         instance = cls()