A complete unit of this high availability solution may fail without causing an interruption of the data stream. Compared to a normal replication solution not even a short interruption occurs in this case, since real mirroring takes place.
Communication between the controllers is ensured by redundant Fibre Channel connections.
Individual volumes are put specifically at the disposal of the respective servers by RAID. Access is controlled by the WWNs of the Fibre Channel host adapters.
An additional SATA RAID system with Fibre Channel interface is available for logging and monitoring of two Sun Fire systems with Gentoo Linux and Xen virtualization.