You can perform ShadowImage operations when ShadowImage and Universal Replicator are used in a 3DC cascade configuration.
The following tables specify whether SI operations can be performed when UR volumes are shared with SI volumes in a 3DC cascade configuration.
Table. 3DC cascade: Sharing a UR P-VOL with an SI P-VOL on the primary storage system
| UR pair status (P-VOL) |
ShadowImage operation |
| Create pair |
Split pair |
Suspend copy |
Release pair |
Resync pair |
| Normal copy |
Quick resync |
Reverse |
Quick restore |
| PAIR |
YES |
YES |
YES |
YES |
YES |
YES |
NO |
NO |
| COPY |
YES |
YES |
YES |
YES |
YES |
YES |
NO |
NO |
| PSUS/ PSUE |
YES |
YES |
YES |
YES |
YES |
YES |
YES |
NO |
Table. 3DC cascade: Sharing a UR P-VOL with an SI S-VOL on the primary storage system
| UR pair status (P-VOL) |
ShadowImage operation |
| Create pair |
Split pair |
Suspend copy |
Release pair |
Resync pair |
| Normal copy |
Quick resync |
Reverse |
Quick restore |
| PAIR |
NO |
NO |
YES |
YES |
NO |
NO |
NO |
NO |
| COPY |
NO |
NO |
YES |
YES |
NO |
NO |
NO |
NO |
| PSUS/ PSUE |
NO |
YES |
YES |
YES |
YES |
YES |
YES |
NO |
Table. 3DC cascade: Sharing a UR S-VOL or P-VOL with an SI S-VOL on the intermediate storage system
| UR pair status (S-VOL) |
UR pair status (P-VOL) |
ShadowImage operation |
| Create pair |
Split pair |
Suspend copy |
Release pair |
Resync pair |
| Normal copy |
Quick resync |
Reverse |
Quick restore |
| PAIR |
PAIR |
YES |
YES |
YES |
YES |
YES |
YES |
NO |
NO |
| COPY |
YES |
YES |
YES |
YES |
YES |
YES |
NO |
NO |
| PSUS/ PSUE |
YES |
YES |
YES |
YES |
YES |
YES |
NO |
NO |
| COPY |
COPY |
YES |
YES |
YES |
YES |
YES |
YES |
NO |
NO |
| PSUS/ PSUE |
YES |
YES |
YES |
YES |
YES |
YES |
NO |
NO |
| PSUS/ PSUE |
PSUS/ PSUE |
YES |
YES |
YES |
YES |
YES |
YES |
YES |
NO |
Table. 3DC cascade: Sharing a UR S-VOL with an SI P-VOL on the secondary storage system
| UR pair status (S-VOL) |
ShadowImage operation |
| Create pair |
Split pair |
Suspend copy |
Release pair |
Resync pair |
| Normal copy |
Quick resync |
Reverse |
Quick restore |
| PAIR |
YES |
YES |
YES |
YES |
YES |
YES |
NO |
NO |
| COPY |
YES |
YES |
YES |
YES |
YES |
YES |
NO |
NO |
| PSUS/ PSUE |
YES |
YES |
YES |
YES |
YES |
YES |
YES |
NO |