Failsafe Upgrade Feature160STEP 1: Update the Main Unit's boot loader to 0C4 and firmware to3E5 or laterThere are two types of scenarios:• The boot loader version of the Main Unit is earlier than 0C4—youmust upgrade its boot loader to 0C4 or later. See Updating MainUnits for Failsafe Upgrade Feature in Main Units (on page 157) fordetails.• The boot loader version of the Main Unit is 0C4 or later, but itsfirmware code is earlier than 3E5—download the firmware of version4.2 or later, and upgrade it by following the procedure described inGeneral Update Procedure (on page 153). The firmware file to chooseis P2‐xxx.hex (xxx represents the version).STEP 2: Keep only one Stacking Unit connectedTo upgrade the Stacking Unit for obtaining the failsafe capability, onlyone unit is allowed to connect to the Main Unit at one time. If there aremore than one Stacking Unit or no Stacking Unit connected to the MainUnit, you must do the following:1. Power off the Main and Stacking Units.2. Connect only one Stacking Unit to the Main Unit.3. Power on the Stacking Unit first.4. Power on the Main Unit.5. Set the Main Unitʹs stacking support to 1. See the “Stacking Support”section under Paragon II Front Panel Display and Controls (on page16) for additional information.6. Set the Stacking Unit ID to 1. See step 6 of Installing the ParagonP2‐UMT1664S Stacking Unit (on page 35) for additional information.7. Power off both units.8. Power on the Stacking Unit first.9. Power on the Main Unit.STEP 3: Update the Stacking Unit's firmwareBoth of the Stacking Unitʹs firmware code and boot loader will beupdated after the following is done.1. Make sure the Main Unit is connected, via network, to the PC thatwill run Paragon Update.2. Launch the Paragon Update utility: select “R‐P2SBL‐0C5.hex” as thefirmware file, and click the “Send To Paragon” button. See ParagonManager User Guide for detailed operation.
