Hi all, Appears this is known bug and we do not need additional details I asked earlier. The release dates are not available for 2.75.75.75 as it's a  coding + rigorous testing issue  from discovery to fix. However for now there is a work around in community listed under para Redfish management interface failure to set boot device workaround is as folows  openstack baremetal node set --driver-info \ force_persistent_boot_device=Never ${node_uuid} Let us know if this works for your PE 730/640 servers. Thanks pramchan  
Using iDRAC version    PowerEdge R730xd same issue with 2.70.70.70 as wellFailed to change the boot device to disk when deploying node 03997dfa-f693-48a1-b77d-5a1f7394b1a2. Error: Redfish exception occurred. Error: Redfish set boot device failed for node 03997dfa-f693-48a1-b77d-5a1f7394b1a2. Error: HTTP PATCH [URL] returned code 400. Base.1.2.GeneralError: Unable to Process the request because the value entered for the parameter Continuous is not supported by the implementation."}
Issues with redfish trying to set boot device, Not supporting continuous.