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Hitachi VSP User and Reference Guide
Glossary–6
S
SAS
serial-attached SCSI
SATA
serial Advanced Technology Attachment
service information message (SIM)
SIMs are generated by a VSP storage system when it detects an error or
service requirement. SIMs are reported to hosts and displayed on
Storage Navigator.
SFM
See smart flash module
SIM
See service information message
SOM
See system option mode
system disk
The volume from which an open-systems host boots.
system option mode (SOM)
Additional operational parameters for the RAID storage systems that
enable the storage system to be tailored to unique customer operating
requirements. SOMs are set on the service processor.
T
tiered storage
A layered structure of performance levels, or tiers, that matches data
access requirements with the appropriate performance tiers. The tiers
are:
Tier 1: Static content. Tier 1 is fully supported computing expected to
be production quality.
Tier 2: Application logic. Tier 2 platforms are not supported by the
security officer and release engineering teams. Tier 2 systems are
targeted for Tier 1 support, but are still under development.
Tier 3: Database. Tier 3 platforms are architectures for which hardware
is not or will not be available or that are considered legacy systems
unlikely to see broad future use.
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