diff --git a/omaha_response_handler_action_unittest.cc b/omaha_response_handler_action_unittest.cc
index 55c642b..7437f50 100644
--- a/omaha_response_handler_action_unittest.cc
+++ b/omaha_response_handler_action_unittest.cc
@@ -51,13 +51,13 @@
   void SetUp() override {
     FakeBootControl* fake_boot_control = fake_system_state_.fake_boot_control();
     fake_boot_control->SetPartitionDevice(
-        kLegacyPartitionNameKernel, 0, "/dev/sdz2");
+        kPartitionNameKernel, 0, "/dev/sdz2");
     fake_boot_control->SetPartitionDevice(
-        kLegacyPartitionNameRoot, 0, "/dev/sdz3");
+        kPartitionNameRoot, 0, "/dev/sdz3");
     fake_boot_control->SetPartitionDevice(
-        kLegacyPartitionNameKernel, 1, "/dev/sdz4");
+        kPartitionNameKernel, 1, "/dev/sdz4");
     fake_boot_control->SetPartitionDevice(
-        kLegacyPartitionNameRoot, 1, "/dev/sdz5");
+        kPartitionNameRoot, 1, "/dev/sdz5");
   }
 
   // Return true iff the OmahaResponseHandlerAction succeeded.
diff --git a/payload_consumer/delta_performer.cc b/payload_consumer/delta_performer.cc
index a986b07..86bd6c3 100644
--- a/payload_consumer/delta_performer.cc
+++ b/payload_consumer/delta_performer.cc
@@ -800,7 +800,7 @@
   } else if (major_payload_version_ == kChromeOSMajorPayloadVersion) {
     LOG(INFO) << "Converting update information from old format.";
     PartitionUpdate root_part;
-    root_part.set_partition_name(kLegacyPartitionNameRoot);
+    root_part.set_partition_name(kPartitionNameRoot);
 #ifdef __ANDROID__
     LOG(WARNING) << "Legacy payload major version provided to an Android "
                     "build. Assuming no post-install. Please use major version "
@@ -822,7 +822,7 @@
     partitions_.push_back(std::move(root_part));
 
     PartitionUpdate kern_part;
-    kern_part.set_partition_name(kLegacyPartitionNameKernel);
+    kern_part.set_partition_name(kPartitionNameKernel);
     kern_part.set_run_postinstall(false);
     if (manifest_.has_old_kernel_info()) {
       *kern_part.mutable_old_partition_info() = manifest_.old_kernel_info();
diff --git a/payload_consumer/delta_performer_integration_test.cc b/payload_consumer/delta_performer_integration_test.cc
index 98bac9e..78647a5 100644
--- a/payload_consumer/delta_performer_integration_test.cc
+++ b/payload_consumer/delta_performer_integration_test.cc
@@ -504,8 +504,8 @@
     payload_config.version.major = kChromeOSMajorPayloadVersion;
     payload_config.version.minor = minor_version;
     if (!full_rootfs) {
-      payload_config.source.partitions.emplace_back(kLegacyPartitionNameRoot);
-      payload_config.source.partitions.emplace_back(kLegacyPartitionNameKernel);
+      payload_config.source.partitions.emplace_back(kPartitionNameRoot);
+      payload_config.source.partitions.emplace_back(kPartitionNameKernel);
       payload_config.source.partitions.front().path = state->a_img;
       if (!full_kernel)
         payload_config.source.partitions.back().path = state->old_kernel;
@@ -518,9 +518,9 @@
         // Use 1 MiB chunk size for the full unittests.
         payload_config.hard_chunk_size = 1024 * 1024;
     }
-    payload_config.target.partitions.emplace_back(kLegacyPartitionNameRoot);
+    payload_config.target.partitions.emplace_back(kPartitionNameRoot);
     payload_config.target.partitions.back().path = state->b_img;
-    payload_config.target.partitions.emplace_back(kLegacyPartitionNameKernel);
+    payload_config.target.partitions.emplace_back(kPartitionNameKernel);
     payload_config.target.partitions.back().path = state->new_kernel;
     payload_config.target.image_info = new_image_info;
     EXPECT_TRUE(payload_config.target.LoadImageSize());
@@ -722,10 +722,10 @@
   install_plan->target_slot = 1;
 
   InstallPlan::Partition root_part;
-  root_part.name = kLegacyPartitionNameRoot;
+  root_part.name = kPartitionNameRoot;
 
   InstallPlan::Partition kernel_part;
-  kernel_part.name = kLegacyPartitionNameKernel;
+  kernel_part.name = kPartitionNameKernel;
 
   LOG(INFO) << "Setting payload metadata size in Omaha  = "
             << state->metadata_size;
@@ -771,13 +771,13 @@
   }
 
   state->fake_boot_control_.SetPartitionDevice(
-      kLegacyPartitionNameRoot, install_plan->source_slot, state->a_img);
+      kPartitionNameRoot, install_plan->source_slot, state->a_img);
   state->fake_boot_control_.SetPartitionDevice(
-      kLegacyPartitionNameKernel, install_plan->source_slot, state->old_kernel);
+      kPartitionNameKernel, install_plan->source_slot, state->old_kernel);
   state->fake_boot_control_.SetPartitionDevice(
-      kLegacyPartitionNameRoot, install_plan->target_slot, target_root);
+      kPartitionNameRoot, install_plan->target_slot, target_root);
   state->fake_boot_control_.SetPartitionDevice(
-      kLegacyPartitionNameKernel, install_plan->target_slot, target_kernel);
+      kPartitionNameKernel, install_plan->target_slot, target_kernel);
 
   ErrorCode expected_error, actual_error;
   bool continue_writing;
@@ -879,8 +879,8 @@
 
   const auto& partitions = state->install_plan.partitions;
   EXPECT_EQ(2U, partitions.size());
-  EXPECT_EQ(kLegacyPartitionNameRoot, partitions[0].name);
-  EXPECT_EQ(kLegacyPartitionNameKernel, partitions[1].name);
+  EXPECT_EQ(kPartitionNameRoot, partitions[0].name);
+  EXPECT_EQ(kPartitionNameKernel, partitions[1].name);
 
   EXPECT_EQ(kDefaultKernelSize, partitions[1].target_size);
   brillo::Blob expected_new_kernel_hash;
diff --git a/payload_consumer/delta_performer_unittest.cc b/payload_consumer/delta_performer_unittest.cc
index c3e4fdb..21f22d6 100644
--- a/payload_consumer/delta_performer_unittest.cc
+++ b/payload_consumer/delta_performer_unittest.cc
@@ -199,22 +199,22 @@
     PayloadFile payload;
     EXPECT_TRUE(payload.Init(config));
 
-    PartitionConfig old_part(kLegacyPartitionNameRoot);
+    PartitionConfig old_part(kPartitionNameRoot);
     if (minor_version != kFullPayloadMinorVersion) {
       // When generating a delta payload we need to include the old partition
       // information to mark it as a delta payload.
       old_part.path = "/dev/null";
       old_part.size = 0;
     }
-    PartitionConfig new_part(kLegacyPartitionNameRoot);
+    PartitionConfig new_part(kPartitionNameRoot);
     new_part.path = "/dev/zero";
     new_part.size = 1234;
 
     payload.AddPartition(old_part, new_part, aops);
 
     // We include a kernel partition without operations.
-    old_part.name = kLegacyPartitionNameKernel;
-    new_part.name = kLegacyPartitionNameKernel;
+    old_part.name = kPartitionNameKernel;
+    new_part.name = kPartitionNameKernel;
     new_part.size = 0;
     payload.AddPartition(old_part, new_part, {});
 
@@ -277,13 +277,13 @@
     // We installed the operations only in the rootfs partition, but the
     // delta performer needs to access all the partitions.
     fake_boot_control_.SetPartitionDevice(
-        kLegacyPartitionNameRoot, install_plan_.target_slot, new_part);
+        kPartitionNameRoot, install_plan_.target_slot, new_part);
     fake_boot_control_.SetPartitionDevice(
-        kLegacyPartitionNameRoot, install_plan_.source_slot, source_path);
+        kPartitionNameRoot, install_plan_.source_slot, source_path);
     fake_boot_control_.SetPartitionDevice(
-        kLegacyPartitionNameKernel, install_plan_.target_slot, "/dev/null");
+        kPartitionNameKernel, install_plan_.target_slot, "/dev/null");
     fake_boot_control_.SetPartitionDevice(
-        kLegacyPartitionNameKernel, install_plan_.source_slot, "/dev/null");
+        kPartitionNameKernel, install_plan_.source_slot, "/dev/null");
 
     EXPECT_EQ(expect_success,
               performer_.Write(payload_data.data(), payload_data.size()));
diff --git a/payload_consumer/payload_constants.cc b/payload_consumer/payload_constants.cc
index 797e76d..6e7cd00 100644
--- a/payload_consumer/payload_constants.cc
+++ b/payload_consumer/payload_constants.cc
@@ -36,8 +36,8 @@
 
 const uint64_t kMaxPayloadHeaderSize = 24;
 
-const char kLegacyPartitionNameKernel[] = "boot";
-const char kLegacyPartitionNameRoot[] = "system";
+const char kPartitionNameKernel[] = "kernel";
+const char kPartitionNameRoot[] = "root";
 
 const char kDeltaMagic[4] = {'C', 'r', 'A', 'U'};
 
diff --git a/payload_consumer/payload_constants.h b/payload_consumer/payload_constants.h
index 43c3137..0833484 100644
--- a/payload_consumer/payload_constants.h
+++ b/payload_consumer/payload_constants.h
@@ -63,8 +63,8 @@
 // The kernel and rootfs partition names used by the BootControlInterface when
 // handling update payloads with a major version 1. The names of the updated
 // partitions are include in the payload itself for major version 2.
-extern const char kLegacyPartitionNameKernel[];
-extern const char kLegacyPartitionNameRoot[];
+extern const char kPartitionNameKernel[];
+extern const char kPartitionNameRoot[];
 
 extern const char kBspatchPath[];
 extern const char kDeltaMagic[4];
diff --git a/payload_generator/generate_delta_main.cc b/payload_generator/generate_delta_main.cc
index d5a73ef..cd08118 100644
--- a/payload_generator/generate_delta_main.cc
+++ b/payload_generator/generate_delta_main.cc
@@ -290,8 +290,8 @@
                 "Path to the .map files associated with the partition files "
                 "in the new partition, similar to the -old_mapfiles flag.");
   DEFINE_string(partition_names,
-                string(kLegacyPartitionNameRoot) + ":" +
-                kLegacyPartitionNameKernel,
+                string(kPartitionNameRoot) + ":" +
+                kPartitionNameKernel,
                 "Names of the partitions. To pass multiple names, use a single "
                 "argument with a colon between names, e.g. "
                 "name:name2:name3:last_name . Name can not be empty, and it "
@@ -447,8 +447,8 @@
     LOG_IF(FATAL, partition_names.size() != 2)
         << "To support more than 2 partitions, please use the "
         << "--new_partitions flag and major version 2.";
-    LOG_IF(FATAL, partition_names[0] != kLegacyPartitionNameRoot ||
-                  partition_names[1] != kLegacyPartitionNameKernel)
+    LOG_IF(FATAL, partition_names[0] != kPartitionNameRoot ||
+                  partition_names[1] != kPartitionNameKernel)
         << "To support non-default partition name, please use the "
         << "--new_partitions flag and major version 2.";
   }
diff --git a/payload_generator/inplace_generator.cc b/payload_generator/inplace_generator.cc
index febdcce..62608e5 100644
--- a/payload_generator/inplace_generator.cc
+++ b/payload_generator/inplace_generator.cc
@@ -802,7 +802,7 @@
                                config.hard_chunk_size / config.block_size);
   size_t soft_chunk_blocks = config.soft_chunk_size / config.block_size;
   uint64_t partition_size = new_part.size;
-  if (new_part.name == kLegacyPartitionNameRoot)
+  if (new_part.name == kPartitionNameRoot)
     partition_size = config.rootfs_partition_size;
 
   LOG(INFO) << "Delta compressing " << new_part.name << " partition...";
diff --git a/payload_generator/payload_file.cc b/payload_generator/payload_file.cc
index 941b640..a9e32a3 100644
--- a/payload_generator/payload_file.cc
+++ b/payload_generator/payload_file.cc
@@ -81,8 +81,8 @@
                                const vector<AnnotatedOperation>& aops) {
   // Check partitions order for Chrome OS
   if (major_version_ == kChromeOSMajorPayloadVersion) {
-    const vector<const char*> part_order = { kLegacyPartitionNameRoot,
-                                             kLegacyPartitionNameKernel };
+    const vector<const char*> part_order = { kPartitionNameRoot,
+                                             kPartitionNameKernel };
     TEST_AND_RETURN_FALSE(part_vec_.size() < part_order.size());
     TEST_AND_RETURN_FALSE(new_conf.name == part_order[part_vec_.size()]);
   }
@@ -152,7 +152,7 @@
         *(partition->mutable_new_partition_info()) = part.new_info;
     } else {
       // major_version_ == kChromeOSMajorPayloadVersion
-      if (part.name == kLegacyPartitionNameKernel) {
+      if (part.name == kPartitionNameKernel) {
         for (const AnnotatedOperation& aop : part.aops)
           *manifest_.add_kernel_install_operations() = aop.op;
         if (part.old_info.has_size() || part.old_info.has_hash())
diff --git a/payload_generator/payload_generation_config.cc b/payload_generator/payload_generation_config.cc
index 15d4ab5..1f65b24 100644
--- a/payload_generator/payload_generation_config.cc
+++ b/payload_generator/payload_generation_config.cc
@@ -209,7 +209,7 @@
     TEST_AND_RETURN_FALSE(part.ValidateExists());
     TEST_AND_RETURN_FALSE(part.size % block_size == 0);
     if (version.minor == kInPlaceMinorPayloadVersion &&
-        part.name == kLegacyPartitionNameRoot)
+        part.name == kPartitionNameRoot)
       TEST_AND_RETURN_FALSE(rootfs_partition_size >= part.size);
     if (version.major == kChromeOSMajorPayloadVersion)
       TEST_AND_RETURN_FALSE(part.postinstall.IsEmpty());
diff --git a/scripts/brillo_update_payload b/scripts/brillo_update_payload
index 9dae42b..70ab7e2 100755
--- a/scripts/brillo_update_payload
+++ b/scripts/brillo_update_payload
@@ -118,7 +118,7 @@
 
 # Check that a command is specified.
 if [[ $# -lt 1 ]]; then
-  echo "Please specify a command [generate|hash|sign|properties]"
+  echo "Please specify a command [generate|hash|sign|properties|verify]"
   exit 1
 fi
 
@@ -362,18 +362,15 @@
   # updater supports a newer major version.
   FORCE_MAJOR_VERSION="1"
 
-  # When generating legacy Chrome OS images, we need to use "boot" and "system"
-  # for the partition names to be compatible with updating Brillo devices with
-  # Chrome OS images.
-  eval ${partitions_array}[boot]=\""${kernel}"\"
-  eval ${partitions_array}[system]=\""${root}"\"
+  eval ${partitions_array}[kernel]=\""${kernel}"\"
+  eval ${partitions_array}[root]=\""${root}"\"
 
   if [[ -n "${partitions_order}" ]]; then
-    eval "${partitions_order}=( \"system\" \"boot\" )"
+    eval "${partitions_order}=( \"root\" \"kernel\" )"
   fi
 
   local part varname
-  for part in boot system; do
+  for part in kernel root; do
     varname="${partitions_array}[${part}]"
     printf "md5sum of %s: " "${varname}"
     md5sum "${!varname}"