diff --git a/compute/cloud-client/src/main/java/compute/disks/CreateDiskSecondaryCustom.java b/compute/cloud-client/src/main/java/compute/disks/CreateDiskSecondaryCustom.java
index df5c74de9bf..b47f9866048 100644
--- a/compute/cloud-client/src/main/java/compute/disks/CreateDiskSecondaryCustom.java
+++ b/compute/cloud-client/src/main/java/compute/disks/CreateDiskSecondaryCustom.java
@@ -36,7 +36,9 @@ public static void main(String[] args)
       throws IOException, ExecutionException, InterruptedException, TimeoutException {
     // TODO(developer): Replace these variables before running the sample.
     // The project that contains the primary disk.
-    String projectId = "YOUR_PROJECT_ID";
+    String primaryProjectId = "PRIMARY_PROJECT_ID";
+    // The project that contains the secondary disk.
+    String secondaryProjectId = "SECONDARY_PROJECT_ID";
     // Name of the primary disk you want to use.
     String primaryDiskName = "PRIMARY_DISK_NAME";
     // Name of the zone in which your primary disk is located.
@@ -48,24 +50,24 @@ public static void main(String[] args)
     // Name of the zone in which you want to create the secondary disk.
     String secondaryDiskZone = "us-east1-c";
     // Size of the new disk in gigabytes.
-    long diskSizeGb = 10L;
+    long diskSizeGb = 30L;
     // The type of the disk you want to create. This value uses the following format:
     // "projects/{projectId}/zones/{zone}/diskTypes/
     // (pd-standard|pd-ssd|pd-balanced|pd-extreme)".
     String diskType = String.format(
-        "projects/%s/zones/%s/diskTypes/pd-balanced", projectId, secondaryDiskZone);
+        "projects/%s/zones/%s/diskTypes/pd-balanced", secondaryProjectId, secondaryDiskZone);
 
-    createDiskSecondaryCustom(projectId, primaryDiskName, secondaryDiskName,
-        primaryDiskZone, secondaryDiskZone, diskSizeGb,  diskType);
+    createDiskSecondaryCustom(primaryProjectId, secondaryProjectId, primaryDiskName,
+        secondaryDiskName, primaryDiskZone, secondaryDiskZone, diskSizeGb,  diskType);
   }
 
   // Creates a secondary disk with specified custom parameters.
-  public static Disk createDiskSecondaryCustom(String projectId, String primaryDiskName,
-      String secondaryDiskName, String primaryDiskZone, String secondaryDiskZone,
-      long diskSizeGb,  String diskType)
+  public static Disk createDiskSecondaryCustom(String primaryProjectId, String secondaryProjectId,
+      String primaryDiskName, String secondaryDiskName, String primaryDiskZone,
+      String secondaryDiskZone, long diskSizeGb,  String diskType)
       throws IOException, ExecutionException, InterruptedException, TimeoutException {
     String primaryDiskSource = String.format("projects/%s/zones/%s/disks/%s",
-        projectId, primaryDiskZone, primaryDiskName);
+        primaryProjectId, primaryDiskZone, primaryDiskName);
 
     DiskAsyncReplication asyncReplication = DiskAsyncReplication.newBuilder()
         .setDisk(primaryDiskSource)
@@ -96,13 +98,13 @@ public static Disk createDiskSecondaryCustom(String projectId, String primaryDis
           .build();
 
       // Wait for the create disk operation to complete.
-      Operation response = disksClient.insertAsync(projectId, secondaryDiskZone, disk)
+      Operation response = disksClient.insertAsync(secondaryProjectId, secondaryDiskZone, disk)
           .get(3, TimeUnit.MINUTES);
 
       if (response.hasError()) {
         return null;
       }
-      return disksClient.get(projectId, secondaryDiskZone, secondaryDiskName);
+      return disksClient.get(secondaryProjectId, secondaryDiskZone, secondaryDiskName);
     }
   }
 }
diff --git a/compute/cloud-client/src/test/java/compute/disks/DisksIT.java b/compute/cloud-client/src/test/java/compute/disks/DisksIT.java
index 84461272693..0ad471458f8 100644
--- a/compute/cloud-client/src/test/java/compute/disks/DisksIT.java
+++ b/compute/cloud-client/src/test/java/compute/disks/DisksIT.java
@@ -309,7 +309,8 @@ public void testCreateDiskSecondaryCustom()
     String diskType =  String.format(
         "projects/%s/zones/%s/diskTypes/pd-ssd", PROJECT_ID, ZONE);
     Disk disk = CreateDiskSecondaryCustom.createDiskSecondaryCustom(
-        PROJECT_ID, EMPTY_DISK_NAME, SECONDARY_DISK_CUSTOM, ZONE,
+        PROJECT_ID, PROJECT_ID, EMPTY_DISK_NAME,
+        SECONDARY_DISK_CUSTOM, ZONE,
         "us-central1-c", DISK_SIZE,  diskType);
 
     // Verify that the secondary disk was created.