diff --git a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
index cdf0e9fbeee..2d6db54b2b7 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
+++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
@@ -695,6 +695,9 @@ Release 2.7.0 - UNRELEASED
     HDFS-7788. Post-2.6 namenode may not start up with an image containing
     inodes created with an old release. (Rushabh Shah via kihwal)
 
+    HDFS-7814. Fix usage string of storageType parameter for
+    "dfsadmin -setSpaceQuota/clrSpaceQuota". (Xiaoyu Yao via cnauroth)
+
     BREAKDOWN OF HDFS-7584 SUBTASKS AND RELATED JIRAS
 
       HDFS-7720. Quota by Storage Type API, tools and ClientNameNode
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java
index ae9088cd3e6..6ba778f3479 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java
@@ -207,9 +207,9 @@ public class DFSAdmin extends FsShell {
   /** A class that supports command clearSpaceQuota */
   private static class ClearSpaceQuotaCommand extends DFSAdminCommand {
     private static final String NAME = "clrSpaceQuota";
-    private static final String USAGE = "-"+NAME+" <dirname>...<dirname> -storageType <storagetype>";
+    private static final String USAGE = "-"+NAME+" [-storageType <storagetype>] <dirname>...<dirname>";
     private static final String DESCRIPTION = USAGE + ": " +
-    "Clear the disk space quota for each directory <dirName>.\n" +
+    "Clear the space quota for each directory <dirName>.\n" +
     "\t\tFor each directory, attempt to clear the quota. An error will be reported if\n" +
     "\t\t1. the directory does not exist or is a file, or\n" +
     "\t\t2. user is not an administrator.\n" +
@@ -259,9 +259,9 @@ public class DFSAdmin extends FsShell {
   private static class SetSpaceQuotaCommand extends DFSAdminCommand {
     private static final String NAME = "setSpaceQuota";
     private static final String USAGE =
-      "-"+NAME+" <quota> <dirname>...<dirname> -storageType <storagetype>";
+      "-"+NAME+" <quota> [-storageType <storagetype>] <dirname>...<dirname>";
     private static final String DESCRIPTION = USAGE + ": " +
-      "Set the disk space quota <quota> for each directory <dirName>.\n" + 
+      "Set the space quota <quota> for each directory <dirName>.\n" +
       "\t\tThe space quota is a long integer that puts a hard limit\n" +
       "\t\ton the total size of all the files under the directory tree.\n" +
       "\t\tThe extra space required for replication is also counted. E.g.\n" +
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/resources/testHDFSConf.xml b/hadoop-hdfs-project/hadoop-hdfs/src/test/resources/testHDFSConf.xml
index 4e1d7977445..7aac8490518 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/resources/testHDFSConf.xml
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/resources/testHDFSConf.xml
@@ -15521,7 +15521,7 @@
       <comparators>
         <comparator>
           <type>RegexpComparator</type>
-          <expected-output>^-setSpaceQuota &lt;quota&gt; &lt;dirname&gt;...&lt;dirname&gt; -storageType &lt;storagetype&gt;: Set the disk space quota &lt;quota&gt; for each directory &lt;dirName&gt;.( )*</expected-output>
+          <expected-output>^-setSpaceQuota &lt;quota&gt; \[-storageType &lt;storagetype&gt;\] &lt;dirname&gt;...&lt;dirname&gt;: Set the space quota &lt;quota&gt; for each directory &lt;dirName&gt;.( )*</expected-output>
         </comparator>
         <comparator>
           <type>RegexpComparator</type>
@@ -15556,7 +15556,7 @@
       <comparators>
         <comparator>
           <type>RegexpComparator</type>
-          <expected-output>^-clrSpaceQuota &lt;dirname&gt;...&lt;dirname&gt; -storageType &lt;storagetype&gt;: Clear the disk space quota for each directory &lt;dirName&gt;.( )*</expected-output>
+          <expected-output>^-clrSpaceQuota \[-storageType &lt;storagetype&gt;\] &lt;dirname&gt;...&lt;dirname&gt;: Clear the space quota for each directory &lt;dirName&gt;.( )*</expected-output>
         </comparator>
         <comparator>
           <type>RegexpComparator</type>