diff --git a/hadoop-ozone/interface-storage/pom.xml b/hadoop-ozone/interface-storage/pom.xml
index 43ba408dcba6..9f000bf8a7a1 100644
--- a/hadoop-ozone/interface-storage/pom.xml
+++ b/hadoop-ozone/interface-storage/pom.xml
@@ -34,6 +34,11 @@
       <artifactId>hadoop-ozone-common</artifactId>
     </dependency>
 
+    <dependency>
+      <groupId>com.google.protobuf</groupId>
+      <artifactId>protobuf-java</artifactId>
+    </dependency>
+
     <dependency>
       <groupId>org.apache.hadoop</groupId>
       <artifactId>hadoop-ozone-interface-client</artifactId>
@@ -63,4 +68,29 @@
     </dependency>
 
   </dependencies>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.xolstice.maven.plugins</groupId>
+        <artifactId>protobuf-maven-plugin</artifactId>
+        <version>${protobuf-maven-plugin.version}</version>
+        <extensions>true</extensions>
+        <executions>
+          <execution>
+            <id>compile-protoc</id>
+            <goals>
+              <goal>compile</goal>
+              <goal>test-compile</goal>
+            </goals>
+            <configuration>
+              <protoSourceRoot>${basedir}/src/main/proto/</protoSourceRoot>
+              <protocArtifact>
+                com.google.protobuf:protoc:${protobuf.version}:exe:${os.detected.classifier}
+              </protocArtifact>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
 </project>
\ No newline at end of file
diff --git a/hadoop-ozone/interface-storage/src/main/java/org/apache/hadoop/ozone/om/codec/OmPrefixInfoCodec.java b/hadoop-ozone/interface-storage/src/main/java/org/apache/hadoop/ozone/om/codec/OmPrefixInfoCodec.java
index 44a07418a78f..919d97296f5b 100644
--- a/hadoop-ozone/interface-storage/src/main/java/org/apache/hadoop/ozone/om/codec/OmPrefixInfoCodec.java
+++ b/hadoop-ozone/interface-storage/src/main/java/org/apache/hadoop/ozone/om/codec/OmPrefixInfoCodec.java
@@ -20,7 +20,7 @@
 import com.google.common.base.Preconditions;
 import com.google.protobuf.InvalidProtocolBufferException;
 import org.apache.hadoop.ozone.om.helpers.OmPrefixInfo;
-import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos.PrefixInfo;
+import org.apache.hadoop.ozone.storage.proto.OzoneManagerStorageProtos.PersistedPrefixInfo;
 
 import org.apache.hadoop.hdds.utils.db.Codec;
 
@@ -44,7 +44,8 @@ public OmPrefixInfo fromPersistedFormat(byte[] rawData) throws IOException {
         .checkNotNull(rawData,
             "Null byte array can't converted to real object.");
     try {
-      return OmPrefixInfo.getFromProtobuf(PrefixInfo.parseFrom(rawData));
+      return OmPrefixInfo.getFromProtobuf(
+          PersistedPrefixInfo.parseFrom(rawData));
     } catch (InvalidProtocolBufferException e) {
       throw new IllegalArgumentException(
           "Can't encode the the raw data from the byte array", e);
diff --git a/hadoop-ozone/common/src/main/java/org/apache/hadoop/ozone/om/helpers/OmPrefixInfo.java b/hadoop-ozone/interface-storage/src/main/java/org/apache/hadoop/ozone/om/helpers/OmPrefixInfo.java
similarity index 92%
rename from hadoop-ozone/common/src/main/java/org/apache/hadoop/ozone/om/helpers/OmPrefixInfo.java
rename to hadoop-ozone/interface-storage/src/main/java/org/apache/hadoop/ozone/om/helpers/OmPrefixInfo.java
index 80ca54d5404f..a1ad55a7b656 100644
--- a/hadoop-ozone/common/src/main/java/org/apache/hadoop/ozone/om/helpers/OmPrefixInfo.java
+++ b/hadoop-ozone/interface-storage/src/main/java/org/apache/hadoop/ozone/om/helpers/OmPrefixInfo.java
@@ -20,7 +20,7 @@
 
 import com.google.common.base.Preconditions;
 import org.apache.hadoop.ozone.OzoneAcl;
-import org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos.PrefixInfo;
+import org.apache.hadoop.ozone.storage.proto.OzoneManagerStorageProtos.PersistedPrefixInfo;
 
 import java.util.BitSet;
 import java.util.HashMap;
@@ -150,11 +150,12 @@ public OmPrefixInfo build() {
   /**
    * Creates PrefixInfo protobuf from OmPrefixInfo.
    */
-  public PrefixInfo getProtobuf() {
-    PrefixInfo.Builder pib =  PrefixInfo.newBuilder().setName(name)
+  public PersistedPrefixInfo getProtobuf() {
+    PersistedPrefixInfo.Builder pib =
+        PersistedPrefixInfo.newBuilder().setName(name)
         .addAllMetadata(KeyValueUtil.toProtobuf(metadata));
     if (acls != null) {
-      pib.addAllAcls(OzoneAclUtil.toProtobuf(acls));
+      pib.addAllAcls(OzoneAclStorageUtil.toProtobuf(acls));
     }
     return pib.build();
   }
@@ -164,7 +165,7 @@ public PrefixInfo getProtobuf() {
    * @param prefixInfo
    * @return instance of OmPrefixInfo
    */
-  public static OmPrefixInfo getFromProtobuf(PrefixInfo prefixInfo) {
+  public static OmPrefixInfo getFromProtobuf(PersistedPrefixInfo prefixInfo) {
     OmPrefixInfo.Builder opib = OmPrefixInfo.newBuilder()
         .setName(prefixInfo.getName());
     if (prefixInfo.getMetadataList() != null) {
@@ -172,7 +173,7 @@ public static OmPrefixInfo getFromProtobuf(PrefixInfo prefixInfo) {
           .getFromProtobuf(prefixInfo.getMetadataList()));
     }
     if (prefixInfo.getAclsList() != null) {
-      opib.setAcls(OzoneAclUtil.fromProtobuf(prefixInfo.getAclsList()));
+      opib.setAcls(OzoneAclStorageUtil.fromProtobuf(prefixInfo.getAclsList()));
     }
     return opib.build();
   }
diff --git a/hadoop-ozone/interface-storage/src/main/java/org/apache/hadoop/ozone/om/helpers/OzoneAclStorage.java b/hadoop-ozone/interface-storage/src/main/java/org/apache/hadoop/ozone/om/helpers/OzoneAclStorage.java
new file mode 100644
index 000000000000..abc6359efcaf
--- /dev/null
+++ b/hadoop-ozone/interface-storage/src/main/java/org/apache/hadoop/ozone/om/helpers/OzoneAclStorage.java
@@ -0,0 +1,63 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.ozone.om.helpers;
+
+import com.google.protobuf.ByteString;
+import java.util.BitSet;
+import org.apache.hadoop.ozone.OzoneAcl;
+import org.apache.hadoop.ozone.OzoneAcl.AclScope;
+import org.apache.hadoop.ozone.security.acl.IAccessAuthorizer.ACLIdentityType;
+import org.apache.hadoop.ozone.storage.proto.OzoneManagerStorageProtos.OzoneAclInfo;
+import org.apache.hadoop.ozone.storage.proto.OzoneManagerStorageProtos.OzoneAclInfo.OzoneAclScope;
+import org.apache.hadoop.ozone.storage.proto.OzoneManagerStorageProtos.OzoneAclInfo.OzoneAclType;
+
+/**
+ * OzoneAclStorage classes define bucket ACLs used in OZONE.
+ * This class is used by storage proto only.
+ *
+ * ACLs in Ozone follow this pattern.
+ * <ul>
+ * <li>user:name:rw
+ * <li>group:name:rw
+ * <li>world::rw
+ * </ul>
+ */
+final class OzoneAclStorage {
+  /**
+   * Private constructor.
+   */
+  private OzoneAclStorage() {
+  }
+
+  public static OzoneAclInfo toProtobuf(OzoneAcl acl) {
+    OzoneAclInfo.Builder builder = OzoneAclInfo.newBuilder()
+        .setName(acl.getName())
+        .setType(OzoneAclType.valueOf(acl.getType().name()))
+        .setAclScope(OzoneAclScope.valueOf(acl.getAclScope().name()))
+        .setRights(ByteString.copyFrom(acl.getAclBitSet().toByteArray()));
+    return builder.build();
+  }
+
+  public static OzoneAcl fromProtobuf(OzoneAclInfo protoAcl) {
+    BitSet aclRights = BitSet.valueOf(protoAcl.getRights().toByteArray());
+    return new OzoneAcl(ACLIdentityType.valueOf(protoAcl.getType().name()),
+        protoAcl.getName(), aclRights,
+        AclScope.valueOf(protoAcl.getAclScope().name()));
+  }
+
+}
diff --git a/hadoop-ozone/interface-storage/src/main/java/org/apache/hadoop/ozone/om/helpers/OzoneAclStorageUtil.java b/hadoop-ozone/interface-storage/src/main/java/org/apache/hadoop/ozone/om/helpers/OzoneAclStorageUtil.java
new file mode 100644
index 000000000000..06c6e82d7179
--- /dev/null
+++ b/hadoop-ozone/interface-storage/src/main/java/org/apache/hadoop/ozone/om/helpers/OzoneAclStorageUtil.java
@@ -0,0 +1,62 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.hadoop.ozone.om.helpers;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.apache.hadoop.ozone.OzoneAcl;
+import org.apache.hadoop.ozone.storage.proto.OzoneManagerStorageProtos.OzoneAclInfo;
+
+/**
+ * Helper class for ozone acls operations.
+ * This class is used by storage proto only.
+ */
+final class OzoneAclStorageUtil {
+  /**
+   * Private constructor.
+   */
+  private OzoneAclStorageUtil() {
+  }
+
+  /**
+   * Convert a list of OzoneAcl(java) to list of OzoneAclInfo(protoc).
+   * @param protoAcls
+   * @return list of OzoneAclInfo.
+   */
+  public static List<OzoneAclInfo> toProtobuf(List<OzoneAcl> protoAcls) {
+    List<OzoneAclInfo> ozoneAclInfos = new ArrayList<>();
+    for (OzoneAcl acl : protoAcls) {
+      ozoneAclInfos.add(OzoneAclStorage.toProtobuf(acl));
+    }
+    return ozoneAclInfos;
+  }
+
+  /**
+   * Convert a list of OzoneAclInfo(protoc) to list of OzoneAcl(java).
+   * @param protoAcls
+   * @return list of OzoneAcl.
+   */
+  public static List<OzoneAcl> fromProtobuf(List<OzoneAclInfo> protoAcls) {
+    List<OzoneAcl> ozoneAcls = new ArrayList<>();
+    for (OzoneAclInfo aclInfo : protoAcls) {
+      ozoneAcls.add(OzoneAclStorage.fromProtobuf(aclInfo));
+    }
+    return ozoneAcls;
+  }
+
+}
diff --git a/hadoop-ozone/interface-storage/src/main/java/org/apache/hadoop/ozone/om/helpers/package-info.java b/hadoop-ozone/interface-storage/src/main/java/org/apache/hadoop/ozone/om/helpers/package-info.java
new file mode 100644
index 000000000000..4101cf376884
--- /dev/null
+++ b/hadoop-ozone/interface-storage/src/main/java/org/apache/hadoop/ozone/om/helpers/package-info.java
@@ -0,0 +1,24 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * <p>
+ * Utility classes to encode/decode DTO objects to/from byte array.
+ */
+
+/**
+ * Helpers for OM storage proto layer.
+ */
+package org.apache.hadoop.ozone.om.helpers;
\ No newline at end of file
diff --git a/hadoop-ozone/interface-storage/src/main/proto/OmStorageProtocol.proto b/hadoop-ozone/interface-storage/src/main/proto/OmStorageProtocol.proto
new file mode 100644
index 000000000000..74b0109fc05f
--- /dev/null
+++ b/hadoop-ozone/interface-storage/src/main/proto/OmStorageProtocol.proto
@@ -0,0 +1,60 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * These .proto interfaces are private and unstable.
+ * Please see http://wiki.apache.org/hadoop/Compatibility
+ * for what changes are allowed for a *unstable* .proto interface.
+ */
+
+syntax = "proto2";
+option java_package = "org.apache.hadoop.ozone.storage.proto";
+option java_outer_classname = "OzoneManagerStorageProtos";
+option java_generic_services = true;
+option java_generate_equals_and_hash = true;
+package hadoop.ozone;
+
+import "hdds.proto";
+
+message OzoneAclInfo {
+  enum OzoneAclType {
+    USER = 1;
+    GROUP = 2;
+    WORLD = 3;
+    ANONYMOUS = 4;
+    CLIENT_IP = 5;
+  }
+
+  enum OzoneAclScope {
+    ACCESS = 0;
+    DEFAULT = 1;
+  }
+
+  required OzoneAclType type = 1;
+  required string name = 2;
+  required bytes rights = 3;
+  required OzoneAclScope aclScope = 4 [default = ACCESS];
+}
+
+message PersistedPrefixInfo {
+  required string name = 1;
+  repeated OzoneAclInfo acls = 2;
+  repeated hadoop.hdds.KeyValue metadata = 3;
+  optional uint64 objectID = 4;
+  optional uint64 updateID = 5;
+}
\ No newline at end of file
diff --git a/hadoop-ozone/common/src/test/java/org/apache/hadoop/ozone/om/helpers/TestOmPrefixInfo.java b/hadoop-ozone/interface-storage/src/test/java/org/apache/hadoop/ozone/om/helpers/TestOmPrefixInfo.java
similarity index 100%
rename from hadoop-ozone/common/src/test/java/org/apache/hadoop/ozone/om/helpers/TestOmPrefixInfo.java
rename to hadoop-ozone/interface-storage/src/test/java/org/apache/hadoop/ozone/om/helpers/TestOmPrefixInfo.java
diff --git a/hadoop-ozone/interface-storage/src/test/java/org/apache/hadoop/ozone/om/helpers/package-info.java b/hadoop-ozone/interface-storage/src/test/java/org/apache/hadoop/ozone/om/helpers/package-info.java
new file mode 100644
index 000000000000..bda29d2bcc8f
--- /dev/null
+++ b/hadoop-ozone/interface-storage/src/test/java/org/apache/hadoop/ozone/om/helpers/package-info.java
@@ -0,0 +1,24 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * <p>
+ * Utility classes to encode/decode DTO objects to/from byte array.
+ */
+
+/**
+ * Unit tests for helpers in OM.
+ */
+package org.apache.hadoop.ozone.om.helpers;
\ No newline at end of file