diff --git a/ironic_python_agent/hardware.py b/ironic_python_agent/hardware.py
index 9ed0c5b85..2f532053f 100644
--- a/ironic_python_agent/hardware.py
+++ b/ironic_python_agent/hardware.py
@@ -316,10 +316,11 @@ def list_all_block_devices(block_type='disk',
             raise errors.BlockDeviceError(
                 '%s must be returned by lsblk.' % ', '.join(sorted(missing)))
 
-        # NOTE(dtantsur): zRAM devices can appear in the output of lsblk, but
-        # we cannot do anything useful with them.
-        if device['KNAME'].startswith('zram'):
-            LOG.debug('Skipping zRAM device %s', device)
+        # NOTE(dtantsur): RAM disks and zRAM devices appear in the output of
+        # lsblk as disks, but we cannot do anything useful with them.
+        if (device['KNAME'].startswith('ram')
+                or device['KNAME'].startswith('zram')):
+            LOG.debug('Skipping RAM device %s', device)
             continue
 
         name = os.path.join('/dev', device['KNAME'])
diff --git a/ironic_python_agent/tests/unit/test_hardware.py b/ironic_python_agent/tests/unit/test_hardware.py
index f540f1f59..c99e0aaf2 100644
--- a/ironic_python_agent/tests/unit/test_hardware.py
+++ b/ironic_python_agent/tests/unit/test_hardware.py
@@ -138,7 +138,11 @@ BLK_DEVICE_TEMPLATE = (
     'KNAME="sdd" MODEL="NWD-BLP4-1600   " SIZE="1765517033472" '
     ' ROTA="0" TYPE="disk"\n'
     'KNAME="loop0" MODEL="" SIZE="109109248" ROTA="1" TYPE="loop"\n'
-    'KNAME="zram0" MODEL="" SIZE="" ROTA="0" TYPE="disk"'
+    'KNAME="zram0" MODEL="" SIZE="" ROTA="0" TYPE="disk"\n'
+    'KNAME="ram0" MODEL="" SIZE="8388608" ROTA="0" TYPE="disk"\n'
+    'KNAME="ram1" MODEL="" SIZE="8388608" ROTA="0" TYPE="disk"\n'
+    'KNAME="ram2" MODEL="" SIZE="8388608" ROTA="0" TYPE="disk"\n'
+    'KNAME="ram3" MODEL="" SIZE="8388608" ROTA="0" TYPE="disk"'
 )
 
 # NOTE(pas-ha) largest device is 1 byte smaller than 4GiB