Designing Disaster Tolerant High Availability Clusters, 10th Edition, March 2003 (B7660-90013)

Physical Data Replication for ContinentalClusters Using EMC SRDF
Failback Scenarios
Chapter 7 353
# symgate define pd /dev/rdsk/c7t15d0
# symgate define pd /dev/rdsk/c7t15d1
# symgate -g pkgCCA_r1 associate pd /dev/rdsk/c7t15d0
2. Halt the ContinentalClusters recovery packages at the recovery site
using
# cmhaltpkg <pkg_name>
This will halt any applications, remove any floating IP addresses,
unmount file systems and deactivate volume groups as programmed
into the package control files. The status of the paired volumes will
be SPLIT at both the recovery and primary sites.
3. Halt the Cluster, which also halts the monitor package ccmonpkg.
4. Start the cluster at the primary site. Assuming they have been
properly configured the ContinentalClusters primary packages
should not start. The monitor package should start automatically.
Since the paired volumes have a status of SPLIT at both the primary
and recovery sites, the EMC views the two halves as unmirrored.
5. Issue the following command:
# symrdf -g pkgCCB_r1 failback
Since the most current data will be at the remote or recovery site,
this command to synchronize from the remote site). Wait for the
synchronization process to complete before progressing to the next
step. Failure to wait for the synchronization to complete will result
in the package failing to start in the next step.
6. Manually start the ContinentalClusters primary packages at the
primary site using
# cmrunpkg <PKG_NAME>
The control script is programmed to handle this case. The control
script recognizes that the paired volume is synchronized and will
proceed with the programmed package startup.
7. Perform
# symrdf list
to verify the device group is synchronized.