File:HP StorageWorks P9000 Continuous Access Synchronous User Guide - Continuous Access Synchronous Components.jpg

A typical configuration consists of the following elements. Many but not all require user set up. • A P9500 system—on the local side connected to a host. The system on the remote side, which may be a P9500 system, must be connected to the local array via fibre channel data paths. The secondary system may consist of a different models—XP12000 Disk Array/XP10000 Disk Array or of other vendors’ systems. • A host at the local site, connected to the local storage system. It is also highly desirable to have a host at the secondary site connected to the secondary system for use in a disaster recovery. If this is not possible, the local host must be in communication with the secondary system. • A primary volume (P-VOL) on the local system that is copied to the secondary volume (S-VOL) on the secondary system. The primary and secondary volumes may be composed of expanded LUs using LUN Expansion. • Fibre Channel data paths for data transfer between secondary system. • Target, initiator, and RCU target ports for the Fibre-Channel interface • Remote Web Console graphical user interface software, used to perform Continuous Access Synchronous configuration and pair operations. RAID Manager (RAID Manager) software may also be used for most pair operations, as well as disaster recovery operations.

Source: HP StorageWorks P9000 Continuous Access Synchronous user Guide - Figure 1 Continous Access Synchronous Components.