ironic在虚拟机实验成功，在服务器实验失败？

我使用的deploy镜像是tinyipa-sta-mitaka.initrd，tinyipa-sta-mitaka.kernel。在虚拟机模拟中可以部署成功，在服务器中，两个部署镜像下载执行成功，lookup与心跳包均已完成，在下载用户镜像的时候失败，具体错误：
Agent lookup using data {u'version': u'2', 'http_method': u'POST', u'inventory': {u'bmc_address': u'', u'interfaces': [{u'name': u'eth5', u'has_carrier': False, u'switch_port_descr': None, u'switch_chassis_descr': None, u'ipv4_address': None, u'mac_address': u'00:1b:21:90:ce:41'}, {u'name': u'eth1', u'has_carrier': False, u'switch_port_descr': None, u'switch_chassis_descr': None, u'ipv4_address': None, u'mac_address': u'44:a8:42:0c:2c:00'}, {u'name': u'eth0', u'has_carrier': True, u'switch_port_descr': None, u'switch_chassis_descr': None, u'ipv4_address': u'172.16.19.193', u'mac_address': u'44:a8:42:0c:2b:ff'}, {u'name': u'eth2', u'has_carrier': False, u'switch_port_descr': None, u'switch_chassis_descr': None, u'ipv4_address': None, u'mac_address': u'44:a8:42:0c:2c:01'}, {u'name': u'eth4', u'has_carrier': False, u'switch_port_descr': None, u'switch_chassis_descr': None, u'ipv4_address': None, u'mac_address': u'00:1b:21:90:ce:40'}, {u'name': u'eth3', u'has_carrier': False, u'switch_port_descr': None, u'switch_chassis_descr': None, u'ipv4_address': None, u'mac_address': u'44:a8:42:0c:2c:02'}], u'disks': [], u'system_vendor': {u'serial_number': u'1LQLF52', u'product_name': u'PowerEdge R730', u'manufacturer': u'Dell Inc.'}, u'memory': {u'physical_mb': 65536, u'total': 67560456192}, u'cpu': {u'count': 32, u'frequency': u'3200.0000', u'model_name': u'Intel(R) Xeon(R) CPU E5-2630 v3 @ 2.40GHz', u'architecture': u'x86_64'}}}

Error: {u'message': u'Error finding the disk or partition device to deploy the image onto: No suitable device was found for deployment - root device hints were not provided and all found block devices are smaller than 4294967296B.', u'code': 404, u'type': u'DeviceNotFound', u'details': u'No suitable device was found for deployment - root device hints were not provided and all found block devices are smaller than 4294967296B.'}