"In this instance, a component within a switch in our primary data centre suffered a very rare partial failure which prevented the backup switch from activating."
So the primary switch failed and took out the backup rather than t'other way about.
"In this instance, a component within a switch in our primary data centre suffered a very rare partial failure which prevented the backup switch from activating."
So the primary switch failed and took out the backup rather than t'other way about.