diff --git a/cinder/api/extensions.py b/cinder/api/extensions.py
index 09ab1dc7e87..800d38c730b 100644
--- a/cinder/api/extensions.py
+++ b/cinder/api/extensions.py
@@ -140,7 +140,8 @@ class ExtensionManager(object):
         LOG.debug('Loaded extension: %s', alias)
 
         if alias in self.extensions:
-            raise exception.Error("Found duplicate extension: %s" % alias)
+            raise exception.CinderException(
+                "Found duplicate extension: %s" % alias)
         self.extensions[alias] = ext
 
     def get_resources(self):
diff --git a/cinder/backup/drivers/tsm.py b/cinder/backup/drivers/tsm.py
index c0d1db58d09..795c0d08e1e 100644
--- a/cinder/backup/drivers/tsm.py
+++ b/cinder/backup/drivers/tsm.py
@@ -406,18 +406,6 @@ class TSMBackupDriver(driver.BackupDriver):
                       'err': exc.stderr})
             LOG.error(err)
             raise exception.InvalidBackup(reason=err)
-        except exception.Error as exc:
-            err = (_('backup: %(vol_id)s failed to run dsmc '
-                     'due to invalid arguments '
-                     'on %(bpath)s.\n'
-                     'stdout: %(out)s\n stderr: %(err)s')
-                   % {'vol_id': backup.volume_id,
-                      'bpath': backup_path,
-                      'out': exc.stdout,
-                      'err': exc.stderr})
-            LOG.error(err)
-            raise exception.InvalidBackup(reason=err)
-
         finally:
             _cleanup_device_hardlink(backup_path, volume_path,
                                      backup.volume_id)
@@ -466,18 +454,6 @@ class TSMBackupDriver(driver.BackupDriver):
                       'err': exc.stderr})
             LOG.error(err)
             raise exception.InvalidBackup(reason=err)
-        except exception.Error as exc:
-            err = (_('restore: %(vol_id)s failed to run dsmc '
-                     'due to invalid arguments '
-                     'on %(bpath)s.\n'
-                     'stdout: %(out)s\n stderr: %(err)s')
-                   % {'vol_id': volume_id,
-                      'bpath': restore_path,
-                      'out': exc.stdout,
-                      'err': exc.stderr})
-            LOG.error(err)
-            raise exception.InvalidBackup(reason=err)
-
         finally:
             _cleanup_device_hardlink(restore_path, volume_path, volume_id)
 
@@ -519,16 +495,6 @@ class TSMBackupDriver(driver.BackupDriver):
                       'err': exc.stderr})
             LOG.error(err)
             raise exception.InvalidBackup(reason=err)
-        except exception.Error as exc:
-            err = (_('delete: %(vol_id)s failed to run dsmc '
-                     'due to invalid arguments with '
-                     'stdout: %(out)s\n stderr: %(err)s')
-                   % {'vol_id': backup.volume_id,
-                      'out': exc.stdout,
-                      'err': exc.stderr})
-            LOG.error(err)
-            raise exception.InvalidBackup(reason=err)
-
         success = _check_dsmc_output(out, delete_attrs)
         if not success:
             # log error if tsm cannot delete the backup object
diff --git a/cinder/exception.py b/cinder/exception.py
index 6086b8a57cf..71ee5214b2f 100644
--- a/cinder/exception.py
+++ b/cinder/exception.py
@@ -57,10 +57,6 @@ class ConvertedException(webob.exc.WSGIHTTPException):
         super(ConvertedException, self).__init__()
 
 
-class Error(Exception):
-    pass
-
-
 class CinderException(Exception):
     """Base Cinder Exception
 
diff --git a/cinder/tests/unit/test_utils.py b/cinder/tests/unit/test_utils.py
index 469506d0b3e..845f74a4223 100644
--- a/cinder/tests/unit/test_utils.py
+++ b/cinder/tests/unit/test_utils.py
@@ -517,7 +517,7 @@ class GetBlkdevMajorMinorTestCase(test.TestCase):
     @mock.patch('stat.S_ISBLK', return_value=False)
     def test_get_blkdev_failure(self, mock_isblk, mock_ischr, mock_stat):
         path = '/some/path'
-        self.assertRaises(exception.Error,
+        self.assertRaises(exception.CinderException,
                           utils.get_blkdev_major_minor,
                           path, lookup_for_file=False)
         mock_stat.assert_called_once_with(path)
diff --git a/cinder/utils.py b/cinder/utils.py
index 74f285a198f..0b75b663816 100644
--- a/cinder/utils.py
+++ b/cinder/utils.py
@@ -590,7 +590,7 @@ def get_blkdev_major_minor(path, lookup_for_file=True):
         return get_blkdev_major_minor(devpath, False)
     else:
         msg = _("Unable to get a block device for file \'%s\'") % path
-        raise exception.Error(msg)
+        raise exception.CinderException(msg)
 
 
 def check_string_length(value, name, min_length=0, max_length=None,
diff --git a/cinder/volume/throttling.py b/cinder/volume/throttling.py
index 3c6ddaa4cb6..b79a2d36bbd 100644
--- a/cinder/volume/throttling.py
+++ b/cinder/volume/throttling.py
@@ -75,7 +75,7 @@ class BlkioCgroup(Throttle):
     def _get_device_number(self, path):
         try:
             return utils.get_blkdev_major_minor(path)
-        except exception.Error as e:
+        except exception.CinderException as e:
             LOG.error('Failed to get device number for throttling: '
                       '%(error)s', {'error': e})