Hitachi ShadowImage for IBM z/OS User"s Guide (T5213-96002, June 2007)

2-24 About ShadowImage™ for IBM

z/OS

Operations

Hitachi ShadowImage™ for IBM

z/OS

User’s Guide

• Use ShadowImage for z/OS to provide on-site backup copies of TCz

M-VOLs, and/or

• Use TCz to provide remote backup copies of SIz S-VOLs.

TCz M-VOL

SIz S-VOL

TCz R-VOL

SIz T-VOL

Storage system 1

Storage system 2

TrueCopy for z/OS

ShadowImage

for z/OS

Figure 2-10 SIz and TCz: Shared S-VOL / M-VOL

The configuration shown in Figure 2-11 is an example of a volume, which is

functioning as both an SIz S-VOL and a TCz R-VOL. This configuration allows

you to use SIz to provide additional remote copies of TCz R-VOLs.