Determining the EMC Symmetrix Remote Data Facility Pair State (Sun Cluster Geographic Edition Data Replication Guide for EMC Symmetrix Remote Data Facility)

Sun Cluster Geographic Edition Data Replication Guide for EMC Symmetrix Remote Data Facility

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Determining the EMC Symmetrix Remote Data Facility Pair State

The resource status message reflects the role and state of the RDF pair. For example, the resource status and status message of Faulted Split, is reported when the RDF pair is in a Split state.

The RDF pair state is mapped to the associated resource status as described in the following table.

Table 2–2 Mapping From the RDF Pair State to the Resource Status


Condition	Resource Status	Status Message
The RDF pair state is `Invalid` and the pair state is not `Incorrect Role`.	`Faulted`	`Invalid state`
The RDF pair state is `Partitioned` and the pair state is not `Incorrect Role`, or `Invalid`.	`Faulted`	`Partitioned`
The RDF pair state is `Suspended` and the pair state is not `Incorrect Role`, `Invalid`, or `Partitioned`.	`Faulted`	`Suspended`
The RDF pair state is `SyncInProg` and the pair state is not `Incorrect Role`, `Invalid`, `Partitioned`, or `Suspended`.	`Degraded`	`SyncInProg`
The RDF pair state is `R1 UpdInProg` and the pair state is not `Incorrect Role`, `Invalid`, `Partitioned`, `Suspended`, or `SyncInProg`.	`Faulted`	`R1 UpdInProg`
The RDF pair state is `Split` and the pair state is not `Incorrect Role`, `Invalid`, `Partitioned`, `Suspended`,`SyncInProg`, or `R1 UpdInProg`.	`Faulted`	`Split`
The RDF pair state is `Failed over` and the pair state is not `Incorrect Role`, `Invalid`, `Partitioned`, `Suspended`,`SyncInProg`, `R1 UpdInProg`, or `Split`.	`Faulted`	`Failed over`
The RDF pair state is `R1 Updated` and the pair state is not `Incorrect Role`, `Invalid`, `Partitioned`, `Suspended`,`SyncInProg`, `R1 UpdInProg`, `Split`, or `Failed over`.	`Faulted`	`Replicating with role change`
The RDF pair state is `Synchronized`.	`Online`	`Replicating`

The state of the RDF pair determines the availability of consistent data in the partnership. When the state of the RDF resource on the primary or secondary cluster is Degraded or Faulted, the data volumes might not be synchronized even if the application can still write data from the primary volume to the secondary volume. The RDF pair will be in a Partitioned state and the invalid entries will be logged as the data is written to the primary volume. Manual recovery operations are required to resolve the error and resynchronize the data.