Dell PowerStore Protecting Your Data

Using replication for planned downtime

Planned downtime is a situation where you take the source system offline for maintenance or testing, while operating off the destination system. Before the planned downtime, both the source and destination are running with an active replication session. There is no data loss in planned downtime.

In this scenario, the source system, Boston, is taken offline for maintenance, and the destination system, New York, is used as the production system during the maintenance period. After maintenance is over, return production to the Boston system.

To start planned downtime, select Planned Failover on the Boston source system. The New York destination system is fully synchronized with the source to ensure that there is no data loss. The session remains paused, while the Boston source system becomes read-only and the destination becomes read/write. The New York destination storage resource can provide access to the host. On the New York destination storage resource, select Reprotect to resume replication in the reverse direction.

To resume operations on the Boston system after maintenance, select Planned Failover on the New York system. After the failover is complete, Reprotect on the Boston system.