Avago Technologies 3ware SAS 9750-4i - Manual (Page 38)

Chapter 2. CLI Syntax Reference
30 3ware SATA+SAS RAID Controller Card CLI Guide, Version 10.0
update fw= filename_with_path [force]
This command downloads the specified firmware image to the controllers that
are compatible with it and iterates through all the controllers in the system,
updating the firmware. For more information, see “/cx update
fw=filename_with_path [force]” on page 63.