The patrol diagnosis facility periodically diagnoses the following hardware units that are connected to the standby node.
Shared disk units
The function diagnoses whether a shared disk unit has become unusable because the power is switched off, a cable is disconnected (adapter side or device side) or because of some other reason.
If the diagnosis results indicate that an error was detected in a shared disk unit, an error message is output.
Network interface cards
The function diagnoses whether any network interface card cannot communicate because a cable is disconnected or because of some other reason.
If the diagnosis results indicate that an error of a network interface card was detected, an error message is output and switching to the standby node (failover) becomes disabled.
