Hitachi TAGMASTORE MK-90RD011-25 - Manual (Page 65)

Hitachi Command Control Interface (CCI) User and Reference Guide 47
Hitachi RAID
HORC
control
HOMRC
F
control
Object
volumes
Monitoring
command
Configuration
definition file
Remote execution
TrueCopy
command
server
Configuration
management
Log and trace
Error monitoring
and event
monitoring
HORCM
x HORCM log
x HORCM trace
x Command trace
x Command core file
Command
Command
Command
Command log
User’s execution environment
TrueCopy
Command log
Command
User’s execution environment
ShadowImage
x Syslog file
HORCM (CCI) instances
Command
Hitachi RAID
TrueCopy
control
ShadowImage
control
Object
volumes
Figure 2.21 CCI Software Structure
Connecting the host to one storage system allows you to maintain multiple copies of your
data for testing purposes or offline backup. Connecting the host to two storage systems
enables you to migrate data or implement disaster recovery by maintaining duplicate sets of
data in two different storage systems. You can implement disaster recovery solutions by
placing the storage systems in different geographic areas. Having two attached hosts, one
for the primary volume and one for the secondary volume, allows you to maintain and
administer the primary volumes while the secondary volumes can be taken offline for
testing. Two hosts connected to two storage systems also allows the most flexible disaster
recovery plan, because both sets of data are administered by different hosts, which guards
against storage system as well as host failure.