diff --git a/delfin/common/constants.py b/delfin/common/constants.py
index c512cb8aa..bff18dc3c 100644
--- a/delfin/common/constants.py
+++ b/delfin/common/constants.py
@@ -261,9 +261,10 @@ class HostOSTypes(object):
     WINDOWS_SERVER_2012 = 'Windows Server 2012'
     ORACLE_VM = 'Oracle VM'
     OPEN_VMS = 'Open VMS'
+    UNKNOWN = 'Unknown'
 
     ALL = (LINUX, WINDOWS, SOLARIS, HP_UX, AIX, XEN_SERVER, VMWARE_ESX,
-           LINUX_VIS, WINDOWS_SERVER_2012, ORACLE_VM, OPEN_VMS)
+           LINUX_VIS, WINDOWS_SERVER_2012, ORACLE_VM, OPEN_VMS, UNKNOWN)
 
 
 class InitiatorStatus(object):
@@ -274,6 +275,15 @@ class InitiatorStatus(object):
     ALL = (ONLINE, OFFLINE, UNKNOWN)
 
 
+class InitiatorType(object):
+    FC = 'fc'
+    ISCSI = 'iscsi'
+    NVME_OVER_ROCE = 'roce'
+    UNKNOWN = 'unknown'
+
+    ALL = (FC, ISCSI, NVME_OVER_ROCE, UNKNOWN)
+
+
 # Enumerations for alert severity
 class Severity(object):
     FATAL = 'Fatal'
diff --git a/delfin/db/sqlalchemy/models.py b/delfin/db/sqlalchemy/models.py
index 815f5c5d1..cabbf750a 100644
--- a/delfin/db/sqlalchemy/models.py
+++ b/delfin/db/sqlalchemy/models.py
@@ -302,6 +302,7 @@ class StorageHostInitiator(BASE, DelfinBase):
     alias = Column(String(255))
     wwn = Column(String(255))
     status = Column(String(255))
+    type = Column(String(255))
     native_storage_host_id = Column(String(255))
     native_storage_host_initiator_id = Column(String(255))
 
diff --git a/delfin/tests/unit/fake_data.py b/delfin/tests/unit/fake_data.py
index 643bbd275..287646442 100644
--- a/delfin/tests/unit/fake_data.py
+++ b/delfin/tests/unit/fake_data.py
@@ -103,7 +103,7 @@ def fake_storage_host_initiator_create():
         'updated_at': '2020-06-10T07:17:08.707356',
         'native_storage_host_initiator_id': 'storage_host_initiator_1',
         'native_storage_host_id': 'storage_host_1',
-        'wwn': 'wwn1', }
+        'wwn': 'wwn1', 'type': 'fc'}
     return fake_storage_host_initiators
 
 
@@ -121,6 +121,7 @@ def fake_expected_storage_host_initiator_create():
             "native_storage_host_initiator_id": "storage_host_initiator_1",
             "native_storage_host_id": "storage_host_1",
             "wwn": "wwn1",
+            "type": "fc"
 
         },
     ]