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104 Chapter 2 Overview of CCI Operations
2.9.1.4 Cascading Connections for Hitachi TrueCopy and ShadowImage
The cascading connections for Hitachi TrueCopy/ShadowImage can be set up by using three
configuration definition files that describe the cascading volume entity in a configuration
definition file on the same instance. The mirror descriptor of ShadowImage and Hitachi
TrueCopy definitely describe “0” as MU#, and the mirror descriptor of Hitachi TrueCopy does
not describe “0” as MU#.
TrueCopy
Oradb
PVOL
T3L0
SVOL
T3L4
MU#0
S/P
VOL
T3L2
TrueCopy
MU#0
MU#1
SVOL
T3L6
MU#0
Oradb1
Oradb
HORCM_DEV
#group dev_name port# TID LU MU
Oradb oradev1 CL1-D 3 0
HORCM_INST
#dev_group ip_address service
Oradb HST2
horcm
Oradb HST2
horcm0
HORCM_DEV
#group dev_name port# TID LU MU
Oradb oradev1 CL1-D 3 2
Oradb1 oradev11 CL1-D 3 2 0
Oradb2 oradev21 CL1-D 3 2 1
HORCM_INST
#dev_group ip_address service
Oradb HST1
horcm
Oradb1 HST2
horcm0
Oradb2 HST2
horcm0
HORCM_DEV
#group dev_name port# TID LU MU
Oradb oradev1 CL1-D 3 2
Oradb1 oradev11 CL1-D 3 4 0
Oradb2 oradev21 CL1-D 3 6 0
HORCM_INST
#dev_group ip_address service
Oradb HST1
horcm
Oradb1 HST2
horcm
Oradb2 HST2
horcm
HORCMINST for TrueCopy
HORCMINST for
TrueCopy/ShadowImage
HORCMINST0 for ShadowImage
HOST2
HOST1
TrueCopy
environment
TrueCopy
environment
ShadowImage
environment
HORCC_MRCF=1
ShadowImage
environment
HORCC_MRCF=1
Note:
Shaded portions: If HORCMINST0 needs to operate Hitachi TrueCopy’s paired volume,
then “oradb” must describe that there is a connection to HST1 via HORCMINST0.
Figure 2.51 TrueCopy/ShadowImage Cascading Connection and Configuration File