Hello, everyone, I am assigned to do a upgrade of CUCM 4.X to 6.x. with the help of friends from this forum, I am getting together the steps for the upgrade, customer is using same server upgrade if I am able to let them purchase two spare harddisk ( they are running 7815, there is really no RAID).
1) run the DMA first on the pub.
2)pull the drive out from pub with the data on it
3)plug the new hd into the pub
4)run the upgrade with the DMA. once everything is settled, go to upgrade the sub
5) if upgrade fails, fallback to the old disk
Does this sound like a workable plan for everyone, any suggestions are greatly appreciated, thanks