For another example, when a trigger is engaged due to disk pullout, this event results in an alert indication that the disk has been pulled out.

Inside, LJ asks to see Hale's credentials, but when Hale hears LJ's parents enter the back door, he quickly pulls out a gun with a silencer and points it at LJ.

When a problem occurs with the availability of some of the physical resources, such as some wires being accidentally unplugged, PowerHA senses the errors and makes the other server take over.