diff --git a/Filer-Server-API.md b/Filer-Server-API.md
index caa15d6..be01632 100644
--- a/Filer-Server-API.md
+++ b/Filer-Server-API.md
@@ -25,8 +25,8 @@ You can append to any HTTP API with &pretty=y to see a formatted json output.
 
 | POST/PUT Parameter | Description | Default |
 | ---- | -- | -- |
-| dataCenter | preferred data center | empty |
-| rack | preferred rack | empty |
+| dataCenter | data center | empty |
+| rack | rack | empty |
 | collection | collection | empty |
 | replication | replication | empty |
 | ttl | time to live, examples, 3m: 3 minutes, 4h: 4 hours, 5d: 5 days, 6w: 6 weeks, 7M: 7 months, 8y: 8 years | empty |