diff --git a/teeth_agent/hardware.py b/teeth_agent/hardware.py
index b747180cd..e4dd68bab 100644
--- a/teeth_agent/hardware.py
+++ b/teeth_agent/hardware.py
@@ -44,6 +44,10 @@ class HardwareManager(object):
     def get_primary_mac_address(self):
         pass
 
+    @abc.abstractmethod
+    def get_os_install_device(self):
+        pass
+
 
 class GenericHardwareManager(HardwareManager):
     def evaluate_hardware_support(cls):
@@ -52,6 +56,9 @@ class GenericHardwareManager(HardwareManager):
     def get_primary_mac_address(self):
         return open('/sys/class/net/eth0/address', 'r').read().strip('\n')
 
+    def get_os_install_device(self):
+        return '/dev/sda'
+
 
 def _compare_extensions(ext1, ext2):
     mgr1 = ext1.obj
diff --git a/teeth_agent/standby.py b/teeth_agent/standby.py
index 367b79374..21462c561 100644
--- a/teeth_agent/standby.py
+++ b/teeth_agent/standby.py
@@ -23,6 +23,7 @@ import requests
 from teeth_agent import base
 from teeth_agent import configdrive
 from teeth_agent import errors
+from teeth_agent import hardware
 
 
 def _configdrive_location():
@@ -114,7 +115,7 @@ class PrepareImageCommand(base.AsyncCommandResult):
         location = _configdrive_location()
         metadata = self.command_params['metadata']
         files = self.command_params['files']
-        device = '/dev/sda'
+        device = hardware.get_manager().get_os_install_device()
 
         _download_image(image_info)
         configdrive.write_configdrive(location, metadata, files)
diff --git a/teeth_agent/tests/hardware.py b/teeth_agent/tests/hardware.py
index 33d547813..ca2d89bfd 100644
--- a/teeth_agent/tests/hardware.py
+++ b/teeth_agent/tests/hardware.py
@@ -25,7 +25,7 @@ class TestGenericHardwareManager(unittest.TestCase):
         self.hardware = hardware.GenericHardwareManager()
 
     @mock.patch('__builtin__.open')
-    def test_decom_mode(self, mocked_open):
+    def test_get_primary_mac_address(self, mocked_open):
         f = mocked_open.return_value
         f.read.return_value = '00:0c:29:8c:11:b1\n'
 
@@ -34,3 +34,6 @@ class TestGenericHardwareManager(unittest.TestCase):
 
         mocked_open.assert_called_once_with('/sys/class/net/eth0/address', 'r')
         f.read.assert_called_once_with()
+
+    def test_get_os_install_device(self):
+        self.assertEqual(self.hardware.get_os_install_device(), '/dev/sda')