Is TruFOS needed for Brocade G620 while upgrading from FOS 9.0.1v to 9.1.1v? Last updated Save as PDF Share Share Tweet Share ×Some text in the Modal.. Views:325Visibility:PublicVotes:0Category:fc-seriesSpecialty:sanLast Updated: Applies to Brocade G620 Fabric Operating system (FOS) Answer Upgrade can proceed without installing TruFOS for Brocade G620 Additional Information Brocade TruFOS certificate