Palo Alto firewall OS updades

For PAN FW's OS upgrades in HA active/passive mode.  Can anyone point to the process steps?
Does it required to suspend HA first or doing passive first then failover to the active node?  
Please advice or point to the right link.  Planning to upgrade to the latest 8.0.8 release for PA-850 models.
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Tiras25Asked:
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Andy BartkiewiczNetwork AnalystCommented:
Here are the steps we used to upgrade to 8.0.6

Palo Alto always requires that whenever upgrading to a new major revision you must first upgrade to the base image of the new rev.  We will first need to upgrade to 8.0.0, then to 8.0.6
Backup config:
login to the 5050 Palo Alto
Go to Device tab>Setup (first and default option).
Click on Operations Tab
Under Configuration Management box look under Export
Export both - named configuration snapshot and configuration version

Upgrade to 8.0.0:
Click on the Device tab
Click on Software
Select 8.0.0 and click Upload
A little window will appear with a status bar
Once finished it will prompt to reboot.  Click Yes
You will see a checkmark under the Downloaded column
Select 8.0.6 again and click Install From File
Once finished it will prompt to reboot.  Click Yes
Once rebooted check the Dashboard tab/General Information/Software Version
Verify that the firewall is passing traffic:
Select Monitor/Logs/Traffic

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