Failover And Recovery Process - Cisco MDS 9216 Configuration Manual

Remote Copy

Failover and Recovery Process

When remote copy relationships are active during a normal operation, the source VDisks in the
relationships are fully accessible, and the auxiliary VDisks are not available for write operations.
After a failure in the local (master) cluster, you must stop the remote copy relationship using the
aux-enable option, to allow write access to the auxiliary VDisks in the remote cluster.
remote-cluster(svc)# cluster name remote-cluster remote-copy rcgrp stop aux-enable
remote-cluster(svc)#
If the local cluster comes back up, the administrator can choose to resume the remote copy relationships
in one of two ways.
•
•
The following command resumes the remote copy relationships in the consistency group with the local
cluster as the primary.
local-cluster(svc)# cluster name local-cluster remote-copy rcgrp start force
local-cluster(svc)#
The following commands resume the remote copy relationships in the consistency group with the remote
cluster as the primary, by enabling the aux option in the start command.
remote-cluster(svc)# cluster name remote-cluster remote-copy rcgrp start aux force
remote-cluster(svc)#
Verify the primary configuration for a remote copy consistency group using the show remote-copy
command. The Primary column indicate whether the auxiliary VDisks or source VDisks have the
primary (or master) role.
remote-cluster(svc)# show cluster remote-cluster remote-copy
----------------------------------------------------------
Name
----------------------------------------------------------
rcgrp
remote-cluster(svc)#
Cisco MDS 9000 Family SAN Volume Controller Configuration Guide
7-12
Resume the remote copy relationships with the local cluster acting as the primary or master of the
relationships.
Resume the remote relationships with the remote cluster acting as the primary or master of the
relationships. In either case, the force option is required when you resume the remote
copy—background copy is required to make the source VDisks, and auxiliary VDisks up to date.
Remote Cluster
remote
Mappings Primary Status
2 aux consistent_synchronised
Chapter 7 Configuring Copy Services
78-16119-01, Cisco MDS SAN-OS Release 1.3