Group Version Control For Mixed Storage System Configurations - Hitachi VSP F1500 User And Reference Manual

Group version control for mixed storage system
configurations
Before executing each option of a command, CCI checks the facility version of
the storage system internally to verify that the same version is installed on
mixed storage system configuration. If the configuration includes older
storage systems (for example, 9900V), this method might not meet the
requirements for the mixed storage system environment, because the older
storage system limits the availability enhancements in later facility versions.
If the facility versions of the storage systems are different, you cannot use
TagmaStore USP/TagmaStore NSC-specific facility, because CCI applies the
minimum version to all storage systems. To expand the capability for mixed
storage system configurations and avoid problems such as this, CCI supports
the following group version control to manage a version for each group.
• CCI (HORCM daemon) makes a facility version for each group based on a
configuration file at the startup of HORCM.
• In a mixed storage system configuration, if the facility version of the
storage systems (for example, USP V/VM and TagmaStore USP/
TagmaStore NSC) is different on a group, CCI will apply the minimum
version for each group (see the following figure).
LDM volume discovery and flushing for Windows
Windows systems support the Logical Disk Manager (LDM) (such as VxVM),
and a logical drive letter is typically associated with an LDM volume (\Device
\HarddiskVolumeX). Therefore, you cannot know the relationship between
LDM volumes and the physical volumes of the RAID storage system.
Therefore, you need to create the CCI configuration file, and you need to
know the relationship that is illustrated in
configuration on page
8-2
Figure 8-1 Definition of the group version
8-3.
Examples of using CCI commands
Command Control Interface User and Reference Guide
Figure 8-2 LDM volume