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# About storage systems

A storage system (or storage array) is a storage device from which logical disks (volumes) can be provisioned and mapped or masked to servers. Bringing SAN storage systems under management of the appliance enables you to add and create volumes. You can then attach volumes to server profiles through volume attachments. This enables the server hardware assigned to the server profiles to access the SAN storage system.

When adding a storage system, you must choose a domain on the storage system. You can then select storage pools from that domain on the storage system to add to the appliance. After you add storage pools, you can assign networks to the storage ports associated with the storage system.

See the HPE OneView Support Matrix for a list of supported storage systems.

## About HPE 3PAR StoreServ Storage systems

You can connect supported HPE 3PAR StoreServ Storage systems to the appliance. You must configure a 3PAR system using the 3PAR software to bring it under management of the appliance.

#### Partner port states

Port state | Definition | Equivalent 3PAR state
--- | --- | ---
none | Normal state, not failed over. | `none`
failing over | The port is offline and is in the process of failing over to the partner port. | `failover_pending`
failed over | The port is offline and has failed over to the partner port. | `failed_over`
failed | The port is off offline and cannot fail over to the partner port. | `active_down`
recovering | The port is online and in the process of returning to a normal state. | `failback_pending`
partner port failed over | The partner port has failed over and the port is the partner port traffic. | `active`
partner failed | The partner port has failed and the fail over operation was not successful. | `active_down`

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