Static Priority Mode
If no quorum server is configured or the quorum server is inaccessible, HyperMetro works in static priority mode. When an arbitration occurs, the preferred site wins the arbitration and provides services.
- If links between the two storage systems are down or the non-preferred site of a HyperMetro pair breaks down, LUNs of the storage system at the preferred site continue providing HyperMetro services and LUNs of the storage system at the non-preferred site stop.
- If the preferred site of a HyperMetro pair breaks down, the non-preferred site does not take over HyperMetro services automatically. As a result, the services stop. You must forcibly start the services at the non-preferred site.
If you power off the storage system at the preferred site for maintenance (by choosing 
The following example uses DC A as the preferred site and DC B as the non-preferred site. Table 2-1 describes the arbitration mechanism in static priority mode.
In the following table, if two faults occur in the system, the interval between the faults is less than or equal to 60 seconds.
Fault Diagram |
Fault Description |
Arbitration Result |
|---|---|---|
The link between two storage systems is down. |
The HyperMetro pair is in the To be synchronized state. The LUN in DC A continues providing services while the LUN in DC B stops. |
|
The storage system in DC B malfunctions. |
The HyperMetro pair is in the To be synchronized state. The LUN in DC A continues providing services while the LUN in DC B stops. |
|
The storage system in DC A malfunctions. |
The HyperMetro pair is in the To be synchronized state. The LUN in DC A is inaccessible while the LUN in DC B stops. NOTE:
You must forcibly start the HyperMetro pair to enable the LUN in DC B to provide services. |
|
The HyperMetro replication link and the link between the host and DC B are down. |
The HyperMetro pair is in the To be synchronized state. The LUN in DC A continues providing services while the LUN in DC B stops. |
|
The storage system in DC B malfunctions and the link between the host and DC B is down. |
The HyperMetro pair is in the To be synchronized state. The LUN in DC A continues providing services while the LUN in DC B stops. |
|
The links between the host and DCs A and B are down. |
The HyperMetro pair is in the Normal state. The host cannot access the LUNs in DCs A and B. |
