Overview of Upgrade Abort Procedure¶
You can abort an upgrade procedure if necessary.
There are two cases for aborting an upgrade:
Before controller-0 has been upgraded (that is, only controller-1 has been upgraded): In this case the upgrade can be aborted and the system will remain in service during the abort.
After controller-0 has been upgraded (that is, both controllers have been upgraded): In this case the upgrade can only be aborted with a complete outage and a re-install of all hosts. This would only be done as a last resort, if there was absolutely no other way to recover the system.
Rolling Back a Software Upgrade Before the Second Controller Upgrade
Rolling Back a Software Upgrade After the Second Controller Upgrade