add disk as abbreviation for storage
add disk as abbreviation for storage

PiperOrigin-RevId: 386462311
Change-Id: Iaaa517cf0394ef7acefe88fdfb3ba441647fd09f
GitOrigin-RevId: 4454a2b6c61972706f4912b790f9ab6f7fbe0502

deepmind/xmanager,deepmind/xmanager