diff --git a/cinder/volume/drivers/hgst.py b/cinder/volume/drivers/hgst.py
index 26bbb81ba94..aa11a4082b6 100644
--- a/cinder/volume/drivers/hgst.py
+++ b/cinder/volume/drivers/hgst.py
@@ -92,6 +92,9 @@ class HGSTDriver(driver.VolumeDriver):
     SPACEGB = units.G - 16 * units.M  # Workaround for shrinkage Bug 28320
     BLOCKED = "BLOCKED"  # Exit code when a command is blocked
 
+    # TODO(jsbryant) Remove driver in Stein if CI is not fixed
+    SUPPORTED = False
+
     def __init__(self, *args, **kwargs):
         """Initialize our protocol descriptor/etc."""
         super(HGSTDriver, self).__init__(*args, **kwargs)
diff --git a/releasenotes/notes/hgst-mark-unsupported-b2886de36421c8b0.yaml b/releasenotes/notes/hgst-mark-unsupported-b2886de36421c8b0.yaml
new file mode 100644
index 00000000000..ca009081fad
--- /dev/null
+++ b/releasenotes/notes/hgst-mark-unsupported-b2886de36421c8b0.yaml
@@ -0,0 +1,15 @@
+---
+upgrade:
+  - |
+    The HGST driver has been marked as unsupported and is now
+    deprecated. ``enable_unsupported_driver`` will need to be set
+    to ``True`` in the driver's section in cinder.conf to continue
+    to use it.
+deprecations:
+  - |
+    The HGST driver has been marked as unsupported and is now
+    deprecated. ``enable_unsupported_driver`` will need to be set
+    to ``True`` in the driver's section in cinder.conf to continue
+    to use it. If its support status does not change, it will be
+    removed in the Stein development cycle.
+