diff --git a/repos/system_upgrade/el7toel8/actors/scangrubdevpartitionlayout/libraries/scan_layout.py b/repos/system_upgrade/el7toel8/actors/scangrubdevpartitionlayout/libraries/scan_layout.py
index 83d026568c..7f4a2a5993 100644
--- a/repos/system_upgrade/el7toel8/actors/scangrubdevpartitionlayout/libraries/scan_layout.py
+++ b/repos/system_upgrade/el7toel8/actors/scangrubdevpartitionlayout/libraries/scan_layout.py
@@ -68,6 +68,16 @@ def get_partition_layout(device):
 
     partitions = []
     for partition_line in table_iter:
+        if not partition_line.startswith('/'):
+            # the output can contain warning msg when a partition is not aligned
+            # on physical sector boundary, like:
+            # ~~~
+            # Partition 4 does not start on physical sector boundary.
+            # ~~~
+            # We know that in case of MBR the line we expect to parse always
+            # starts with canonical path. So let's use this condition.
+            # See https://issues.redhat.com/browse/RHEL-50947
+            continue
         # Fields:               Device     Boot   Start      End  Sectors Size Id Type
         # The line looks like: `/dev/vda1  *       2048  2099199  2097152   1G 83 Linux`
         part_info = split_on_space_segments(partition_line)
diff --git a/repos/system_upgrade/el7toel8/actors/scangrubdevpartitionlayout/tests/test_scan_partition_layout.py b/repos/system_upgrade/el7toel8/actors/scangrubdevpartitionlayout/tests/test_scan_partition_layout.py
index 743ca71fe6..9c32e16fea 100644
--- a/repos/system_upgrade/el7toel8/actors/scangrubdevpartitionlayout/tests/test_scan_partition_layout.py
+++ b/repos/system_upgrade/el7toel8/actors/scangrubdevpartitionlayout/tests/test_scan_partition_layout.py
@@ -49,6 +49,9 @@ def test_get_partition_layout(monkeypatch, devices, fs):
             part_line = '{0}   *     {1}     2099199     1048576   83  {2}'.format(part.name, part.start_offset, fs)
             fdisk_output.append(part_line)
 
+        # add a problematic warning msg to test:
+        # https://issues.redhat.com/browse/RHEL-50947
+        fdisk_output.append('Partition 3 does not start on physical sector boundary.')
         device_to_fdisk_output[device.name] = fdisk_output
 
     def mocked_run(cmd, *args, **kwargs):