If a storage system requires maintenance, a SIM is issued and displayed in Device Manager - Storage Navigator. A SIM is also issued when the pair status of a primary or secondary GAD volume changes. SIMs are categorized into service, moderate, serious, and acute according to their severity. The GAD operation history appears in the History window.

If SNMP is installed on the storage systems, SIMs trigger an SNMP trap that is sent to the corresponding server. For details about SNMP operations, see the Hitachi Command Suite User Guide or the SNMP Agent User Guide.