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