Brocade Communications Systems Brocade 300 Release Notes page 22

Migrating from FOS v6.4.x
DCX/DCX-4S units running any FOS v6.4.x firmware must be upgraded to FOS v7.0.x before they can be non-
disruptively upgraded to FOS v7.1.
Any 8G platforms (other than DCX/DCX-4S) that are currently operating at lower than FOS v6.4.1a must be
upgraded to FOS v6.4.1a or later, they then must be upgraded to FOS v7.0.x, before non-disruptively
upgrading to FOS v7.1.0. Upgrading these platforms from any FOS V6.4.x release lower than FOS v6.4.1a to
FOS v7.0.x will cause disruption to FC traffic.
Any 8G platform operating at FOS v6.4.1a or later versions of FOS v6.4.x must be upgraded to FOS v7.0.x or
later before non-disruptively upgrading to FOS v7.1.0.
Migrating from FOS v6.4.1_fcoe1
Units running FOS v6.4.1_fcoe1 must be upgraded to FOS v7.0.x before non-disruptively upgrading to FOS
v7.1.
Fabric OS v7.1.0a Release Notes v1.0 Page 22 of 41