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Hitachi Command Control Interface (CCI) User and Reference Guide 11
2.2.2 ShadowImage Cascading Pairs
ShadowImage provides a cascading function for the ShadowImage S-VOL. The cascading
mirrors of the S-VOL are expressed as virtual volumes using the mirror descriptors (MU#1-2)
in the configuration definition file as shown below. The MU#0 of a mirror descriptor is used
for connection of the S-VOL.
Group name: oradb
Volume A
P-VOL
Volume B
P-VOL
MU#0
Volume C
S-VOL
Oradb1
Volume D
S-VOL
Oradb2
Volume A
P-VOL
MU# 1
Volume B
P-VOL
MU# 1
Volume E
S-VOL
Oradb11
Volume F
S-VOL
Oradb21
Volume C
P-VOL
MU# 1
Volume D
P-VOL
MU# 1
Group name: oradb1
Volume G
S-VOL
Oradb21
Volume H
S-VOL
Oradb22
Volume C
P-VOL
MU# 2
Volume D
P-VOL
MU# 2
Group name: oradb2
MU# 2
MU# 0
MU#0
MU#0
MU#0
MU#0
MU#0
Figure 2.3 ShadowImage Cascade Volume Pairs