The Hitachi HUS 100 familystorage systems are supported for use with Lenovo Storage V7000.
For information about supported levels of Hitachi HUS 100 family firmware for use with Lenovo Storage V7000, search for supported hardware list, device driver, firmware, and recommended software levels at the following website:
http://support.lenovo.com/us/en/products/servers/lenovo-storage
Concurrent firmware upgrades are supported according to Hitachi HUS 100 family procedures.