I'm pretty sure the USB support for "system node firmware download", i.e. -package file://usb0/<filename> is only available with the current-generation FAS/AFF hardware platforms - not the FAS/AFF80x0. But hey... give it a shot and prove me wrong 🙂
For hardware models initially supported by ONTAP 9.1, you can install the ONTAP software and firmware from an external USB mass storage device. With this enhancement, the external USB port on hardware platforms installs or copies ONTAP software and firmware on the embedded boot media.
The USB device is specified as file://usb0/filename. For example, the file name can be image.tgz. The ONTAP software and firmware installation package must be present in the root directory of the USB mass storage device.
The following commands access the ONTAP software and firmware installation package from the external USB mass storage device:
system node image get
system node image update
system node firmware download
storage firmware download
Note: The commands system node firmware download and storage firmware download are available to cluster administrators at the advanced privilege level.