When service actions are required, information is placed in the
DASD subsystem exception series.
Important: The 3990 storage control and
the 9392 family of devices use the service information messages (SIM)
part of the DASD subsystem exception series as the primary indication
that service is required. OBR records are logged but not placed in
the system exception report part of the DASD subsystem exception series
unless the 3990 cannot generate a SIM for the error condition.