diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 200780819..6b394c54a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,8 +15,6 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - python-version: 2.7
-            PYTEST_EXTRA_ARGS: ""
           - python-version: 3.7
             PYTEST_EXTRA_ARGS: "--cov"
 
@@ -55,8 +53,6 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - python-version: 2.7
-            PYTEST_EXTRA_ARGS: ""
           - python-version: 3.7
             PYTEST_EXTRA_ARGS: "--cov"
 
diff --git a/opensvc/drivers/resource/disk/scsireserv/__init__.py b/opensvc/drivers/resource/disk/scsireserv/__init__.py
index 8f75a772b..e297269ff 100644
--- a/opensvc/drivers/resource/disk/scsireserv/__init__.py
+++ b/opensvc/drivers/resource/disk/scsireserv/__init__.py
@@ -233,12 +233,14 @@ def clear(self):
         r = 0
         for d in self.devs:
             try:
-                if not self.disk_reserved(d):
-                    continue
-                r += getattr(self, "disk_clear_reservation")(d)
+                if self.disk_reserved(d):
+                    r += getattr(self, "disk_clear_reservation")(d)
+                elif self.disk_registered(d):
+                    r += self.disk_unregister(d)
             except ex.ScsiPrNotsupported as exc:
                 self.log.warning(str(exc))
                 continue
+
         return r
 
 
diff --git a/opensvc/drivers/resource/disk/scsireserv/sg.py b/opensvc/drivers/resource/disk/scsireserv/sg.py
index 47761a418..cc19d581d 100644
--- a/opensvc/drivers/resource/disk/scsireserv/sg.py
+++ b/opensvc/drivers/resource/disk/scsireserv/sg.py
@@ -124,6 +124,7 @@ def read_registrations(self):
                 n_registered += out.count(self.hostid)
             else:
                 for path in paths:
+                    self.ack_unit_attention(path)
                     ret, out, err = self.read_path_registrations(path)
                     if ret != 0:
                         continue
@@ -193,7 +194,10 @@ def disk_unregister(self, disk):
         if self.use_mpathpersist(disk):
             return self.mpath_unregister(disk)
         else:
-            return self.path_unregister(disk)
+            ret = 0
+            for path in self.devs[disk]:
+                ret += self.path_unregister(path)
+            return ret
 
     def mpath_unregister(self, disk):
         self.set_read_only(0)
@@ -301,7 +305,16 @@ def disk_clear_reservation(self, disk):
         if self.use_mpathpersist(disk):
             return self.mpath_clear_reservation(disk)
         else:
-            return self.path_clear_reservation(disk)
+            ret = self.path_clear_reservation(disk)
+            if ret == 24:
+                self.log.warning("clear %s failed, will try clear on sub devs" % disk)
+                for path in self.devs[disk]:
+                    sub_ret = self.path_clear_reservation(path)
+                    if sub_ret != 0:
+                        self.log.warning("clear %s sub device %s failed" % (disk, path))
+                        continue
+                    return sub_ret
+            return ret
 
     def mpath_clear_reservation(self, disk):
         cmd = ["mpathpersist", "--out", "--clear", "--param-rk=" + self.hostid, disk]