Before the UR pair status changes to PAIR, the TC pair must be changed to PAIR. If you indicate to change the UR pair status to PAIR before the TC pair status is changed to PAIR, the request will be rejected.Setting up the 3DC cascade configuration
Use the following procedure to set up the 3DC cascade configuration.
Procedure
Install and set up TC and UR on the required systems.
Create a TC pair on the primary system with the S-VOL at the intermediate site. For instructions, see the TrueCopy User Guide .
When the TC pair status is PAIR, change the TC S-VOL to UR P-VOL, and then create the UR pair on the primary system.
The mirror ID must be set between 1 and 3.
Before the UR pair status changes to PAIR, the TC pair must be changed to PAIR. If you indicate to change the UR pair status to PAIR before the TC pair status is changed to PAIR, the request will be rejected.