diff --git a/mapreduce/CHANGES.txt b/mapreduce/CHANGES.txt
index 0a0b16d02eb..3d798db9be9 100644
--- a/mapreduce/CHANGES.txt
+++ b/mapreduce/CHANGES.txt
@@ -383,6 +383,8 @@ Trunk (unreleased changes)
 
     MAPREDUCE-2797. Update mapreduce tests and RAID for HDFS-2239.  (szetszwo)
 
+    MAPREDUCE-2805. Update RAID for HDFS-2241.  (szetszwo)
+
 Release 0.22.0 - Unreleased
 
   INCOMPATIBLE CHANGES
diff --git a/mapreduce/src/contrib/raid/src/java/org/apache/hadoop/hdfs/server/datanode/RaidBlockSender.java b/mapreduce/src/contrib/raid/src/java/org/apache/hadoop/hdfs/server/datanode/RaidBlockSender.java
index f55e69e5fce..337deaeedfa 100644
--- a/mapreduce/src/contrib/raid/src/java/org/apache/hadoop/hdfs/server/datanode/RaidBlockSender.java
+++ b/mapreduce/src/contrib/raid/src/java/org/apache/hadoop/hdfs/server/datanode/RaidBlockSender.java
@@ -41,7 +41,7 @@ import org.apache.hadoop.util.StringUtils;
 /**
  * Reads a block from the disk and sends it to a recipient.
  */
-public class RaidBlockSender implements java.io.Closeable, FSConstants {
+public class RaidBlockSender implements java.io.Closeable {
   public static final Log LOG = DataNode.LOG;
   static final Log ClientTraceLog = DataNode.ClientTraceLog;
   
@@ -389,7 +389,7 @@ public class RaidBlockSender implements java.io.Closeable, FSConstants {
         streamForSendChunks = baseStream;
         
         // assure a mininum buffer size.
-        maxChunksPerPacket = (Math.max(BUFFER_SIZE, 
+        maxChunksPerPacket = (Math.max(FSConstants.IO_FILE_BUFFER_SIZE, 
                                        MIN_BUFFER_WITH_TRANSFERTO)
                               + bytesPerChecksum - 1)/bytesPerChecksum;
         
@@ -397,7 +397,7 @@ public class RaidBlockSender implements java.io.Closeable, FSConstants {
         pktSize += checksumSize * maxChunksPerPacket;
       } else {
         maxChunksPerPacket = Math.max(1,
-                 (BUFFER_SIZE + bytesPerChecksum - 1)/bytesPerChecksum);
+            (FSConstants.IO_FILE_BUFFER_SIZE + bytesPerChecksum - 1)/bytesPerChecksum);
         pktSize += (bytesPerChecksum + checksumSize) * maxChunksPerPacket;
       }