Dell PowerFlex 4.5.x Administration Guide

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Replication direction and mapping

Use this table as a reference for replication direction and default access to volumes according to a subsequent RCG operation and action of the PowerFlex system.

The replication involves two peers, system A and system B. When the replication is set up, system A is set as source and system B is set as target. The following replication direction refers to the initial direction A->B and to changes to that direction.


Subsequent RCG operations	Possible actions	Replication direction/access	Access to volumes
Normal	Switchover/test failover/failover Remove	A to B	Access to the volumes is allowed only through the source (system A)
After failover	Reverse/restore Remove	N/A - data is not replicated	By default access to the volume is allowed through the original target (system B). It is possible to enable access through the original source (system A).
After failover + reverse NOTE:Switchover and test failover are only possible after the peers are synchronized.	Switchover/test failover/failover Remove	B to A	Access to the volumes is allowed only through the original target (system B)
After failover + restore NOTE:Switchover and test failover are only possible after the peers are synchronized.	Switchover/test failover/failover Remove	A to B	Access to the volumes is allowed only through the source (system A)
After switchover	Switchover/test failover stop/failover Remove	B to A	Access to the volumes is allowed only through the original target (system B)
After test failover	Switchover/test failover/failover Remove	A to B	Access to the volumes is allowed through both systems (system A and system B)