Hitachi G200 User Manual page 128

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
Hitachi TrueCopy® User Guide for Hitachi Virtual Storage Platform Gx00 and Fx00 Models
Disaster recovery