An information processing apparatus which is capable of reducing operational costs required for the information processing apparatus equipped with HDDs having a mirroring function and a self-diagnosis function. Status information indicative of statuses of the HDDs is obtained by the self-diagnosis function which the HDDs have. Based on the obtained status information obtained, whether or not the HDDs will fail is predicted. When a failure of the HDDs is predicted, and the mirroring function is disabled, an electronic device determined in advance is notified that replacement of the HDDs is necessary. When a failure of the HDDs is predicted, and the mirroring function is enabled, the electronic device is not notified that replacement of the HDDs is necessary.