Hitachi ShadowImage for z/OS user guide (December 2005)

ShadowImage for z/OS user guide 41
The configuration shown in Figure 15 is an example of a volume that is functioning as both an SIz S-VOL
and a URz S-VOL. This configuration allows you to use SIz to provide additional remote copies of URz
S-VOLs.
Figure 15 SIz and URz: Shared S-VOL/S-VOL
The configuration shown in Figure 16 is an example of a volume that is functioning as both a URz P-VOL
and an SIz S-VOL, while the S-VOL of the same URz pair is also functioning as the S-VOL of another SIz
pair. This configuration allows you to:
• Use ShadowImage for z/OS to provide on-site backup copies of URz P-VOLs and S VOLs, and/or
• Use URz to provide remote backup of ShadowImage for z/OS S-VOLs.
Figure 16 SIz and URz: Shared S-VOL/P-VOL and S-VOL/S-VOL
NOTE: Usually TCz and URz can share the volumes with SIz. However, in some cases, you cannot create
SIz pairs using the volume shared with TCz and URz.