diff --git a/SAS/DataManagement/StorageQueryService/cache.py b/SAS/DataManagement/StorageQueryService/cache.py
index e799c1c48bbe1e83a74b11e9ac7cd182492853af..be1626146f3502d7297dae9f30325aa65d0e97ca 100644
--- a/SAS/DataManagement/StorageQueryService/cache.py
+++ b/SAS/DataManagement/StorageQueryService/cache.py
@@ -123,7 +123,7 @@ class CacheManager:
 
             if du_result['found']:
                 if not path in path_cache or path_cache[path]['disk_usage'] != du_result['disk_usage']:
-                    logger.debug('updating cache entry: %s', du_result)
+                    logger.info('updating cache entry: %s', du_result)
                     path_cache[path] = du_result
                     self._sendDiskUsageChangedNotification(path, du_result['disk_usage'], otdb_id)
 
@@ -161,7 +161,7 @@ class CacheManager:
 
                 with self._cacheLock:
                     path_cache = self._cache['path_du_results']
-                    if directory not in path_cache:
+                    if not directory in path_cache:
                         logger.info('tree scan: adding \'%s\' with empty disk_usage to cache which will be du\'ed later', directory)
                         empty_du_result = {'found': True, 'disk_usage': None, 'path': directory, 'name': directory.split('/')[-1]}
                         self._updateCache(empty_du_result)
@@ -211,6 +211,10 @@ class CacheManager:
 
                         if depth1 == 2 or depth2 == 2:
                             if depth1 == 2 and depth2 == 2:
+                                if not entry1['disk_usage']:
+                                    return -1
+                                if not entry2['disk_usage']:
+                                    return 1
                                 if entry1['cache_timestamp'] < entry2['cache_timestamp']:
                                     return -1
                                 if entry1['cache_timestamp'] > entry2['cache_timestamp']:
@@ -242,7 +246,7 @@ class CacheManager:
                                 logger.info('examining old entry %s/%s in cache: %s', i, len(old_entries), path)
                                 result = du_getDiskUsageForPath(path)
                                 if result['found']:
-                                    logger.info('updating old entry in cache: %s', result)
+                                    logger.debug('trying to update old entry in cache: %s', result)
                                     self._updateCache(result)
                         except Exception as e:
                             logger.error(str(e))
@@ -253,7 +257,7 @@ class CacheManager:
                         if datetime.datetime.utcnow() - cacheUpdateStart > datetime.timedelta(minutes=5):
                             # break out of cache update loop if full update takes more than 5min
                             # next loop we'll start with the oldest cache entries again
-                            logger.info('skipping remaining old cache entries updates, they will be updated next time')
+                            logger.info('skipping remaining %s old cache entries updates, they will be updated next time', len(old_entries)-i)
                             break
 
                 for i in range(60):
diff --git a/SAS/ResourceAssignment/ResourceAssignmentEditor/lib/storage.py b/SAS/ResourceAssignment/ResourceAssignmentEditor/lib/storage.py
index 6a91bdd368490a0482d3f584c1393bb1e44455da..2075f3458ea882cd324cf49c59e86ffa8a3ca9e9 100644
--- a/SAS/ResourceAssignment/ResourceAssignmentEditor/lib/storage.py
+++ b/SAS/ResourceAssignment/ResourceAssignmentEditor/lib/storage.py
@@ -31,16 +31,15 @@ import logging
 logger = logging.getLogger(__name__)
 
 def updateTaskStorageDetails(tasks, sqrpc):
+    if not tasks:
+        return
+
     def applyDefaults(task):
         '''apply sane default values for a task'''
         task['disk_usage'] = None
         task['disk_usage_readable'] = None
 
-    try:
-        _ = (t for t in tasks)
-    except TypeError:
-        # make single task instance a list
-        tasks = [tasks]
+    tasks = tasks if isinstance(tasks, list) else [tasks]
 
     for task in tasks:
         applyDefaults(task)