diff --git a/metricsd/Android.mk b/metricsd/Android.mk
index 8a0a8b4..e299042 100644
--- a/metricsd/Android.mk
+++ b/metricsd/Android.mk
@@ -30,6 +30,7 @@
   metrics_client.cc
 
 metrics_daemon_sources := \
+  collectors/disk_usage_collector.cc \
   metrics_daemon.cc \
   metrics_daemon_main.cc \
   persistent_integer.cc \
@@ -43,6 +44,7 @@
   serialization/serialization_utils.cc
 
 metrics_tests_sources := \
+  collectors/disk_usage_collector.cc \
   metrics_daemon.cc \
   metrics_daemon_test.cc \
   metrics_library_test.cc \
diff --git a/metricsd/collectors/disk_usage_collector.cc b/metricsd/collectors/disk_usage_collector.cc
new file mode 100644
index 0000000..5ab51fb
--- /dev/null
+++ b/metricsd/collectors/disk_usage_collector.cc
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed 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.
+ */
+
+#include "collectors/disk_usage_collector.h"
+
+#include <base/bind.h>
+#include <base/bind_helpers.h>
+#include <base/message_loop/message_loop.h>
+#include <sys/statvfs.h>
+
+#include "metrics/metrics_library.h"
+
+namespace {
+
+const char kDiskUsageMB[] = "Platform.DataPartitionUsed.MB";
+const char kDiskUsagePercent[] = "Platform.DataPartitionUsed.Percent";
+const char kDataPartitionPath[] = "/data";
+
+// Collect every 15 minutes.
+const int kDiskUsageCollectorIntervalSeconds = 900;
+
+}  // namespace
+
+DiskUsageCollector::DiskUsageCollector(
+    MetricsLibraryInterface* metrics_library) {
+  collect_interval_ = base::TimeDelta::FromSeconds(
+      kDiskUsageCollectorIntervalSeconds);
+  CHECK(metrics_library);
+  metrics_lib_ = metrics_library;
+}
+
+void DiskUsageCollector::Collect() {
+  struct statvfs buf;
+  int result = statvfs(kDataPartitionPath, &buf);
+  if (result != 0) {
+    PLOG(ERROR) << "Failed to check the available space in "
+                << kDataPartitionPath;
+    return;
+  }
+
+  unsigned long total_space = buf.f_blocks * buf.f_bsize;
+  unsigned long used_space = (buf.f_blocks - buf.f_bfree) * buf.f_bsize;
+  int percent_used = (used_space * 100) / total_space;
+
+  metrics_lib_->SendToUMA(kDiskUsageMB,
+                          used_space / (1024 * 1024),
+                          0,
+                          1024, // up to 1 GB.
+                          100);
+  metrics_lib_->SendEnumToUMA(kDiskUsagePercent, percent_used, 101);
+}
+
+void DiskUsageCollector::CollectCallback() {
+  Collect();
+  Schedule();
+}
+
+void DiskUsageCollector::Schedule() {
+  base::MessageLoop::current()->PostDelayedTask(FROM_HERE,
+      base::Bind(&DiskUsageCollector::CollectCallback, base::Unretained(this)),
+      collect_interval_);
+}
diff --git a/metricsd/collectors/disk_usage_collector.h b/metricsd/collectors/disk_usage_collector.h
new file mode 100644
index 0000000..c1d4546
--- /dev/null
+++ b/metricsd/collectors/disk_usage_collector.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed 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.
+ */
+
+#ifndef METRICSD_COLLECTORS_DISK_USAGE_COLLECTOR_H_
+#define METRICSD_COLLECTORS_DISK_USAGE_COLLECTOR_H_
+
+#include <base/time/time.h>
+
+#include "metrics/metrics_library.h"
+
+class DiskUsageCollector {
+ public:
+  DiskUsageCollector(MetricsLibraryInterface* metrics_library);
+
+  // Schedule the next collection.
+  void Schedule();
+
+  // Callback used by the main loop.
+  void CollectCallback();
+
+  // Collect the disk usage statistics and report them.
+  void Collect();
+
+ private:
+  base::TimeDelta collect_interval_;
+  MetricsLibraryInterface* metrics_lib_;
+};
+
+#endif  // METRICSD_COLLECTORS_DISK_USAGE_COLLECTOR_H_
diff --git a/metricsd/metrics_daemon.cc b/metricsd/metrics_daemon.cc
index b0e4b2f..b831ff2 100644
--- a/metricsd/metrics_daemon.cc
+++ b/metricsd/metrics_daemon.cc
@@ -278,6 +278,7 @@
   diskstats_path_ = diskstats_path;
   scaling_max_freq_path_ = scaling_max_freq_path;
   cpuinfo_max_freq_path_ = cpuinfo_max_freq_path;
+  disk_usage_collector_.reset(new DiskUsageCollector(metrics_lib_));
 
   // If testing, initialize Stats Reporter without connecting DBus
   if (testing_)
@@ -492,6 +493,7 @@
 }
 
 void MetricsDaemon::StatsReporterInit() {
+  disk_usage_collector_->Schedule();
   DiskStatsReadStats(&read_sectors_, &write_sectors_);
   VmStatsReadStats(&vmstats_);
   // The first time around just run the long stat, so we don't delay boot.
diff --git a/metricsd/metrics_daemon.h b/metricsd/metrics_daemon.h
index fbb871e..eaa8219 100644
--- a/metricsd/metrics_daemon.h
+++ b/metricsd/metrics_daemon.h
@@ -29,6 +29,7 @@
 #include <chromeos/daemons/dbus_daemon.h>
 #include <gtest/gtest_prod.h>  // for FRIEND_TEST
 
+#include "collectors/disk_usage_collector.h"
 #include "metrics/metrics_library.h"
 #include "persistent_integer.h"
 #include "uploader/upload_service.h"
@@ -327,6 +328,7 @@
   scoped_ptr<PersistentInteger> kernel_crashes_version_count_;
   scoped_ptr<PersistentInteger> unclean_shutdowns_daily_count_;
   scoped_ptr<PersistentInteger> unclean_shutdowns_weekly_count_;
+  scoped_ptr<DiskUsageCollector> disk_usage_collector_;
 
   std::string diskstats_path_;
   std::string scaling_max_freq_path_;