Sharing volumes with TrueCopy and Universal Replicator

ShadowImage User Guide

Version

9.8.5

Audience

anonymous

Part Number

MK-98RD9021-15

Example of a pair shared by UR S-VOL and TC P-VOL

The following figures provide configuration examples when ShadowImage, TrueCopy, and Universal Replicator are used.

Example of a pair shared by TC S-VOL and UR P-VOL

For the above configurations, you cannot perform Quick Restore for SI pairs.

The following image illustrates a 3DC multi-target configuration with the following pairs:

Universal Replicator pair
Universal Replicator delta resync pair
ShadowImage pair
TrueCopy pair

For details about 3DC multi-target configurations, see the Hitachi Universal Replicator User Guide.

Example of combining an SI pair, TC pair, and UR pair in the 3DC multi-target configuration

Example in a 3DC multi-target configuration

The following tables describe ShadowImage operations according to the status of TC pairs and UR delta resync pairs in the storage system of the TC secondary site.

Table. ShadowImage operations in the TC secondary storage system
TC Pair Status	UR delta resync pair status	ShadowImage operation
		Create pairs	Split pairs	Suspend copy operation	Release pairs	Resync pairs
		Create pairs	Split pairs	Suspend copy operation	Release pairs	Normal copy	Quick resync	Reverse copy	Quick restore
PAIR	HOLD	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
PAIR	HLDE	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. ShadowImage operations in the UR secondary storage system
UR Pair Status	UR delta resync pair status	ShadowImage operation
		Create pairs	Split pairs	Suspend copy operation	Release pairs	Resync pairs
		Create pairs	Split pairs	Suspend copy operation	Release pairs	Normal copy	Quick resync	Reverse copy	Quick restore
PAIR	HOLD	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

The following table describes ShadowImage operations according to the status of TC and UR pairs in the storage system of the TC or UR local site.

The following table applies when there is no UR delta resync pair.

Table. ShadowImage operations in the TC or UR primary storage system
TC pair status	UR pair status	ShadowImage operation
		Create pairs	Split pairs	Suspend copy	Release pairs	Resync pairs
		Create pairs	Split pairs	Suspend copy	Release pairs	Normal copy	Quick resync	Reverse copy	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	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
PSUS/ PSUE	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