tests: Add a separate simpler MD activation test case

MD (de)activation is currently very race-y in both RHEL 9 and 10
and then tests fails often especially when starting and stopping
the array multiple times. This introduces a new simple test case
that should cover most of the use cases without failing all the
time keeping the "full" test case, but marking it as unstable
until these issues are resolved in mdadm.

Author: vojtechtrefny

tests/mdraid_test.py

@@ -202,6 +202,25 @@ def test_create_with_chunk_size(self):
 
 class MDTestActivateDeactivate(MDTestCase):
     @tag_test(TestTags.SLOW, TestTags.CORE)
+    def test_activate_deactivate_core(self):
+        """Verify that it is possible to activate and deactivate an MD RAID"""
+
+        succ = BlockDev.md_create("bd_test_md", "raid0",
+                                    [self.loop_devs[0], self.loop_devs[1]],
+                                    0, None, None)
+        self.assertTrue(succ)
+
+        succ = BlockDev.md_deactivate("bd_test_md")
+        self.assertTrue(succ)
+
+        succ = BlockDev.md_activate("bd_test_md",
+                                    [self.loop_devs[0], self.loop_devs[1]], None)
+        self.assertTrue(succ)
+
+        succ = BlockDev.md_deactivate("bd_test_md")
+        self.assertTrue(succ)
+
+    @tag_test(TestTags.SLOW, TestTags.CORE, TestTags.UNSTABLE)
     def test_activate_deactivate(self):
         """Verify that it is possible to activate and deactivate an MD RAID"""