diff --git a/Path-Specific-Configuration.md b/Path-Specific-Configuration.md
index 116dc22..fa86266 100644
--- a/Path-Specific-Configuration.md
+++ b/Path-Specific-Configuration.md
@@ -56,7 +56,7 @@ $ weed shell
 # Options
 
 For any path, you can configure
-* Disk type [hdd|ssd]
+* Disk type [hdd|ssd|<tag>]
 * Fsync
 * Volume Growth Count
 * Collection
@@ -74,7 +74,7 @@ Usage of fs.configure:
   -delete
     	delete the configuration by locationPrefix
   -disk string
-    	[hdd|ssd] choose between hard drive or solid state drive
+    	[hdd|ssd|<tag>] hard drive or solid state drive or any tag
   -fsync
     	fsync for the writes
   -locationPrefix string
diff --git a/Tiered-Storage.md b/Tiered-Storage.md
index d292e08..dc653ce 100644
--- a/Tiered-Storage.md
+++ b/Tiered-Storage.md
@@ -33,7 +33,7 @@ When `volume.balance` or `volume.fix.replication`, the volume disk type would no
 
 `volume.move` in `weed shell` can be used to move across volume servers:
 ```
-volume.move -source <source volume server host:port> -target <target volume server host:port> -volumeId <volume id> -disk [ssd|hdd]
+volume.move -source <source volume server host:port> -target <target volume server host:port> -volumeId <volume id> -disk [hdd|ssd|<tag>]
 ```
 
 For now, if you only want to change the disk type of a volume, and the volume server is not running, you can simply move the volume data from ssd directory to hdd directory, or vice versa.