7. At the secondary system, halt host operations and vary the P-VOL offline.
This maintains synchronization of the pairs.
8. At the secondary site, split the pairs. Confirm that the pairs are split and
status is PSUS before proceeding. If an error occurs, resolve it before
proceeding.
9. At the secondary system, release the pairs. You do not need to use the
Delete Pair by Force option.
10. At the primary and secondary systems, change the path and port
settings.
- To use the same switches, change the operating mode back to the
original direction.
- To use the same channel extenders, change the operating mode back to
the original direction. The boxes/nodes connected to the primary system
must be set to channel-mode, and the boxes/nodes connected to the
secondary systems must be set to device-mode.
11. At the primary system, perform configuration tasks in preparation for
creating the pairs.
12. At the primary system, establish consistency groups and create the
TrueCopy pairs in the original direction. You may use None for the Initial
Copy Type option because all P-VOLs and S-VOLs are synchronized. If
there is any possibility that the volumes are not 100% synchronized, use
Entire Volume for Initial Copy Type.
13. Vary the primary system and P-VOLs online, and start host operations.
Below is the procedure to transfer operation back to the primary site
without deleting pairs.
1. At the primary site, bring up the host. Make sure that TC components are
operational.
2. Run the CCI pairresync-swaps to the S-VOL command. If the pair data
flow is already set in the opposite direction and the pair is in PAIR or
COPY status, the pairresync-swaps needs not to be run.
3. At the secondary system, halt host operations and vary the P-VOL offline.
This maintains synchronization of the pairs.
4. Run the horctakeover to the P-VOL command.
5. Vary the primary system and P-VOLs online, and start host operations.
9-6
Disaster recovery
Hitachi TrueCopy® User Guide for Hitachi Virtual Storage Platform Gx00 and Fx00 Models
To Next Page
Loading...
