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