Upgrading a UCM to R9
Because release 9 has an OS update for CentOS, you can NOT use the zip files to upgrade a UCM to release 9. You must re-image the UCM (or Application server) If you do this all settings will be lost, so please backup first here….
Application servers will use a DVD for re-imaging, not the USB stick.
First you should backup all data that is necessary, See the post here on how to backup all files.
Second, you will need to build a USB stick for this. Per Tech Tip 260 from Avaya, below are the supported USB devices.