You install a new host interface card (HIC) to replace the failed HIC with a new one.
About this task
Attention: Possible loss of data access – Never install a HIC in an Ef300 or EF600 controller canister if that HIC was designed for another E-Series controller. In addition, if you have a duplex configuration, both controllers and both HICs must be identical. The presence of incompatible or mismatched HICs causes the controllers to lock down when you apply power.