diff --git a/qubesadmin/storage.py b/qubesadmin/storage.py
index a57ad85..b7c5805 100644
--- a/qubesadmin/storage.py
+++ b/qubesadmin/storage.py
@@ -270,6 +270,16 @@ class Pool(object):
             return self.name < other.name
         return NotImplemented
 
+    @property
+    def usage_details(self):
+        ''' Storage pool usage details (current - not cached) '''
+        pool_usage_data = self.app.qubesd_call(
+            'dom0', 'admin.pool.UsageDetails', self.name, None)
+        pool_usage_data = pool_usage_data.decode('utf-8')
+        assert pool_usage_data.endswith('\n')
+        pool_usage_data = pool_usage_data[:-1]
+        return dict(l.split('=', 1) for l in pool_usage_data.splitlines())
+
     @property
     def config(self):
         ''' Storage pool config '''
@@ -287,7 +297,7 @@ class Pool(object):
     def size(self):
         ''' Storage pool size, in bytes'''
         try:
-            return int(self.config['size'])
+            return int(self.usage_details['data_size'])
         except KeyError:
             # pool driver does not provide size information
             return None
@@ -296,7 +306,7 @@ class Pool(object):
     def usage(self):
         ''' Space used in the pool, in bytes '''
         try:
-            return int(self.config['usage'])
+            return int(self.usage_details['data_usage'])
         except KeyError:
             # pool driver does not provide usage information
             return None
diff --git a/qubesadmin/tests/app.py b/qubesadmin/tests/app.py
index 49ca2d7..dfe3814 100644
--- a/qubesadmin/tests/app.py
+++ b/qubesadmin/tests/app.py
@@ -27,9 +27,10 @@ import multiprocessing
 
 try:
     import unittest.mock as mock
+    from unittest.mock import call
 except ImportError:
     import mock
-from mock import call
+    from mock import call
 
 import tempfile
 
diff --git a/qubesadmin/tests/storage.py b/qubesadmin/tests/storage.py
index 7de7615..6123c5b 100644
--- a/qubesadmin/tests/storage.py
+++ b/qubesadmin/tests/storage.py
@@ -303,6 +303,36 @@ class TestPool(qubesadmin.tests.QubesTestCase):
         })
         self.assertAllCalled()
 
+    def test_011_usage(self):
+        self.app.expected_calls[('dom0', 'admin.pool.List', None, None)] = \
+            b'0\x00file\nlvm\n'
+        self.app.expected_calls[('dom0', 'admin.pool.UsageDetails', 'lvm', None)] = \
+            b'0\x00data_size=204800\n' \
+            b'data_usage=102400\n' \
+            b'metadata_size=1024\n' \
+            b'metadata_usage=50\n'
+        pool = self.app.pools['lvm']
+        self.assertEqual(pool.usage_details, {
+            'data_size': '204800',
+            'data_usage': '102400',
+            'metadata_size': '1024',
+            'metadata_usage': '50',
+        })
+        self.assertAllCalled()
+
+    def test_012_size_and_usage(self):
+        self.app.expected_calls[('dom0', 'admin.pool.List', None, None)] = \
+            b'0\x00file\nlvm\n'
+        self.app.expected_calls[('dom0', 'admin.pool.UsageDetails', 'lvm', None)] = \
+            b'0\x00data_size=204800\n' \
+            b'data_usage=102400\n' \
+            b'metadata_size=1024\n' \
+            b'metadata_usage=50\n'
+        pool = self.app.pools['lvm']
+        self.assertEqual(pool.size, 204800)
+        self.assertEqual(pool.usage, 102400)
+        self.assertAllCalled()
+
     def test_020_volumes(self):
         self.app.expected_calls[('dom0', 'admin.pool.List', None, None)] = \
             b'0\x00file\nlvm\n'