Service information messages (SIMs) are generated by a storage
unit for S/390 and zSeries hosts. Before installation, you can use the customization
work sheets to record the following service information: the SIM severity
level and the maximum number of times the storage unit sends the SIMs (0-5
times) to the console. During installation, either you or the IBM service
sales representative must enter this information into the system.
SIM message types
The following SIM message types are
generated by the storage unit.
- Direct access storage device (DASD) SIM
- Tracks DDM failures and problems.
- Media SIM
- Tracks data check problems on the media.
- Storage unit SIM
- Tracks storage unit, power control, and other hardware problems.
SIM severity levels
- 1 acute
- An irrecoverable error with possible loss of data. This severity level
only applies to DASD SIMs.
- 2 serious
- An irrecoverable error or a data check with loss of access to data.
- 3 moderate
- A system path is not operational and performance might be degraded. This
severity level does not apply to media SIMs.
- 4 service
- A recoverable error, equipment checks, or data checks. You can defer repair.