diff --git a/specs/approved/ilo-oob-raid.rst b/specs/approved/ilo-oob-raid.rst
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+..
+ This work is licensed under a Creative Commons Attribution 3.0 Unported
+ License.
+
+ http://creativecommons.org/licenses/by/3.0/legalcode
+
+=======================================================================
+Out-of-band RAID configuration for Gen10 and above HPE Proliant Servers
+=======================================================================
+
+https://bugs.launchpad.net/ironic/+bug/1716329
+
+This specification proposes implementation of out-of-band RAID configuration
+for ILO managed HPE Proliant servers.
+
+Problem description
+===================
+
+Ilo5 based HPE Proliant Gen10 servers provide support to perform out-of-band
+RAID configuration which was not there in Gen9 and below servers.
+
+Proposed change
+===============
+
+This spec proposes to implement out-of-band RAID configuration as described
+by the parent spec [1]. This will require the implementation of a new hardware
+type ``Ilo5Hardware`` and a new raid interface for ilo as ``IloRAID``.
+
+List of changes required:
+
+* The following would be the composition of ``Ilo5Hardware``:
+
+  + This hardware type would be supported on ilo5 based HPE Proliant servers.
+
+  + Ilo5Hardware will inherit all interfaces of parent class IloHardware.
+
+  + Ilo5Hardware will support the new interface ``IloRAID``.
+
+* The following would be the composition of ``IloRAID``:
+
+  + IloRAID will inherit RAIDInterface of base class.
+
+  + ``create_configuration`` - This will create the RAID configuration on
+    the bare metal node.
+
+    - It will create an IloClient object from proliantutils library to do
+      operations on the iLO. This will make call to create_raid_configuration
+      of proliantutils library to create the logical drives on the system.
+
+  + ``delete_configuration`` - This will delete the RAID configuration on
+    the bare metal node.
+
+    - It will create an IloClient object from proliantutils library to do
+      operations on the iLO. This will make call to delete_raid_configuration
+      of proliantutils library to delete the logical drives on the system.
+
+  + ``_create_configuration_final`` - This will be called after the clean
+    step ``IloRAID.create_configuration`` is completed. This method will call
+    ``update_raid_info`` with the actual RAID configuration returned by ilo
+    object.
+
+  + ``_delete_configuration_final`` - This will be called after
+    ``IloRAID.delete_configuration`` is completed. This will set
+    ``node.raid_config`` to ``None``.
+
+Alternatives
+------------
+
+One can perform in-band raid configuration to achieve the same result.
+However, The ramdisk to be used in such case should have proliant-tools
+element as part of the image.
+
+Data model impact
+-----------------
+None
+
+State Machine Impact
+--------------------
+None
+
+REST API impact
+---------------
+None
+
+Client (CLI) impact
+-------------------
+None
+
+RPC API impact
+--------------
+None
+
+Driver API impact
+-----------------
+None
+
+Nova driver impact
+------------------
+None
+
+Ramdisk impact
+--------------
+None
+
+Security impact
+---------------
+None
+
+Other end user impact
+---------------------
+None
+
+Scalability impact
+------------------
+None
+
+Performance Impact
+------------------
+None
+
+Other deployer impact
+---------------------
+
+User need to configure below two things to make use of OOB RAID configuration
+on HPE Proliant Gen10 servers.
+
+* Configure the new hardware type ``ilo5`` to ([DEFAULT]
+  ``enabled_hardware_types``).
+
+* Configure the new raid interface ``ilo5`` to ([DEFAULT]
+  ``enabled_raid_interfaces``).
+
+
+Developer impact
+----------------
+None
+
+
+Implementation
+==============
+
+Assignee(s)
+-----------
+
+Primary assignee:
+theanshuljain
+
+Work Items
+----------
+
+* Add a new hardware type for ilo ``Ilo5Hardware`` which inherits IloHardware.
+* Add a new hardware interface ``IloRAID`` which inherits base.RAIDInterface.
+* Writing unit-test cases for the new OOB RAID interface.
+
+
+Dependencies
+============
+
+The current proliantutils version 2.4.1 does not support OOB Raid. It is under
+development and will be supported in the coming release.
+
+
+Testing
+=======
+
+Unit test cases will be added. Will be tested in 3rd party CI setup.
+
+Upgrades and Backwards Compatibility
+====================================
+
+None
+
+
+Documentation Impact
+====================
+
+Need to update iLO driver documentation for new hardware type and RAID
+interface.
+
+
+References
+==========
+
+[1] Ironic generic raid spec: https://review.openstack.org/173214
diff --git a/specs/not-implemented/ilo-oob-raid.rst b/specs/not-implemented/ilo-oob-raid.rst
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+../approved/ilo-oob-raid.rst
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