diff --git a/fs_mgr/libsnapshot/include/libsnapshot/cow_format.h b/fs_mgr/libsnapshot/include/libsnapshot/cow_format.h
index 75467cb..9e6cfea 100644
--- a/fs_mgr/libsnapshot/include/libsnapshot/cow_format.h
+++ b/fs_mgr/libsnapshot/include/libsnapshot/cow_format.h
@@ -105,8 +105,8 @@
 static constexpr uint8_t kNumResumePoints = 4;
 
 struct CowHeaderV3 : public CowHeader {
-    // Location of sequence buffer in COW.
-    uint64_t sequence_buffer_offset;
+    // Number of sequence data stored (each of which is a 32 byte integer)
+    uint64_t sequence_data_count;
     // number of currently written resume points
     uint32_t resume_point_count;
     // Size, in bytes, of the CowResumePoint buffer.
diff --git a/fs_mgr/libsnapshot/libsnapshot_cow/test_v3.cpp b/fs_mgr/libsnapshot/libsnapshot_cow/test_v3.cpp
index c41e07c..9f857ee 100644
--- a/fs_mgr/libsnapshot/libsnapshot_cow/test_v3.cpp
+++ b/fs_mgr/libsnapshot/libsnapshot_cow/test_v3.cpp
@@ -482,5 +482,43 @@
     header = reader.header_v3();
     ASSERT_EQ(header.op_count, 15);
 }
+
+TEST_F(CowTestV3, BufferMetadataSyncTest) {
+    CowOptions options;
+    options.op_count_max = 100;
+    auto writer = CreateCowWriter(3, options, GetCowFd());
+    /*
+    Header metadafields
+    sequence_data_count = 0;
+    resume_point_count = 0;
+    resume_point_max = 4;
+    */
+    ASSERT_TRUE(writer->Finalize());
+
+    CowReader reader;
+    ASSERT_TRUE(reader.Parse(cow_->fd));
+
+    auto header = reader.header_v3();
+    ASSERT_EQ(header.sequence_data_count, 0);
+    ASSERT_EQ(header.resume_point_count, 0);
+    ASSERT_EQ(header.resume_point_max, 4);
+
+    writer->AddLabel(0);
+    ASSERT_TRUE(reader.Parse(cow_->fd));
+    header = reader.header_v3();
+    ASSERT_EQ(header.sequence_data_count, 0);
+    ASSERT_EQ(header.resume_point_count, 1);
+    ASSERT_EQ(header.resume_point_max, 4);
+
+    ASSERT_TRUE(reader.Parse(cow_->fd));
+    header = reader.header_v3();
+
+    /*
+    Header metadafields
+    sequence_data_count = 1;
+    resume_point_count = 0;
+    resume_point_max = 4;
+    */
+}
 }  // namespace snapshot
 }  // namespace android
diff --git a/fs_mgr/libsnapshot/libsnapshot_cow/writer_v3.cpp b/fs_mgr/libsnapshot/libsnapshot_cow/writer_v3.cpp
index 6883c5e..81ccea9 100644
--- a/fs_mgr/libsnapshot/libsnapshot_cow/writer_v3.cpp
+++ b/fs_mgr/libsnapshot/libsnapshot_cow/writer_v3.cpp
@@ -77,7 +77,7 @@
     // v3 specific fields
     // WIP: not quite sure how some of these are calculated yet, assuming buffer_size is determined
     // during COW size estimation
-    header_.sequence_buffer_offset = 0;
+    header_.sequence_data_count = 0;
     header_.resume_point_count = 0;
     header_.resume_point_max = kNumResumePoints;
     header_.op_count = 0;
@@ -100,6 +100,7 @@
         return false;
     }
     header_.compression_algorithm = *algorithm;
+    header_.op_count_max = options_.op_count_max;
 
     if (parts.size() > 1) {
         if (!android::base::ParseUint(parts[1], &compression_.compression_level)) {
@@ -163,7 +164,7 @@
             return false;
         }
     }
-    header_.op_count_max = options_.op_count_max;
+
     resume_points_ = std::make_shared<std::vector<ResumePoint>>();
 
     if (!Sync()) {
@@ -311,7 +312,7 @@
         PLOG(ERROR) << "writing resume buffer failed";
         return false;
     }
-    return Sync();
+    return Finalize();
 }
 
 bool CowWriterV3::EmitSequenceData(size_t num_ops, const uint32_t* data) {