diff --git a/Tiered-Storage.md b/Tiered-Storage.md
index cdf4cfd..d292e08 100644
--- a/Tiered-Storage.md
+++ b/Tiered-Storage.md
@@ -27,8 +27,14 @@ fs.configure -locationPrefix=/buckets/ssd_ -disk=ssd -apply
 
 https://github.com/chrislusf/seaweedfs/wiki/Path-Specific-Configuration
 
-## Notes
+## Change Volume Disk Type
 
-When `volume.balance`, `volume.fix.replication`, or `volume.move`, the volume disk type would not change.
+When `volume.balance` or `volume.fix.replication`, the volume disk type would not change.
+
+`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]
+```
+
+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.
 
-For now, if you want to change the disk type of a volume, the volume needs to be manually moved from ssd directory to hdd directory, or vice versa.
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