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Hitachi Command Control Interface (CCI) User and Reference Guide 137
3.4 Creating/Editing the Configuration File
The configuration definition file is a text file which is created and/or edited using any
standard text editor (e.g., UNIX vi editor, Windows Notepad). A sample configuration
definition file, HORCM_CONF (/HORCM/etc/horcm.conf), is included with the CCI software.
This file should be used as the basis for creating your configuration definition file(s). The
system administrator should copy the sample file, set the necessary parameters in the
copied file, and place the copied file in the proper directory.
See sections 2.8.3 and 2.9 for detailed descriptions of the configuration definition file(s) for
sample CCI configurat
ions. Table 3.10 contains the parameters defined in the
configuration
file and specifies the default value, type, and limit for each parameter.
Caution: Do not edit the configuration definition file while HORCM is running. Shut down
HORCM, edit the configuration file as needed, and then restart HORCM.
Note: Do not mix pairs created with the At-Time Split option (-m grp) and pairs created
without this option in the same group defined in the CCI configuration file. If you do, the
pairsplit operation might end abnormally, or S-VOLs of the P-VOLs in the same consistency
group might not be created correctly at the time when the pairsplit request is received.
Restrictions for a ShadowImage volume group (9900V and later) in the CCI configuration file:
ShadowImage volume group:
– A group cannot extend across multiple storage systems.
– If a CT group contains more than one device group, pair operations act on the entire
CT Group.
– If a ShadowImage volume will be cascading with TrueCopy/UR volume, data
consistency is not maintained with pairsplit.
CTGID number. CCI assigns a CTGID to disk array automatically when a user makes
ShadowImage volumes specified with “paircreate -m grp” command, and the group of
configuration file is mapped to CTGID. If CCI cannot assign a free CTGID, the “paircreate
-m grp” command is terminated with EX_ENOCTG.
MAX CTGID:
– USP V/VM: 256 (0-255)
– USP/NSC: 256 (0-255)
– 9900V: 128 (0-127)
Number of configurable LDEVs with “-m grp” option. Maximum number of configurable
LDEVs in the same CTGID:
– USP V/VM: 8192
– USP/NSC: 4096
– 9900V: 1024