HP XP7 Storage - Manual (Page 9)

Typical components
A typical configuration consists of the following components. Many but not all require user setup.
•
The primary XP7 storage system is connected to a host. The secondary storage system is
connected to the primary system via Fibre Channel data paths. The secondary system may be
XP7 or other HP model.
•
A host at the local site, connected to the primary 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.
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A P-VOL on the primary storage system that is copied to the S-VOL on the secondary system.
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Fibre Channel data paths for data transfer between primary and secondary system.
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Target, initiator, and RCU target ports for the Fibre Channel interface.
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Remote Web Console graphical user interface software, used to perform Continuous Access
Synchronous Z configuration and pair operations. Business Continuity Manager (BCM), RAID
Manager , and PPRC commands can be used for pair operations.
The following figure shows a typical Continuous Access Synchronous Z environment.
Storage systems
Continuous Access Synchronous Z operations take place between the primary XP7 system and the
secondary system, which can be another XP7 Storage, P9500, or XP24000/XP20000 Disk Array.
The primary system manages the P-VOL and the following operations:
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Host I/O operations to the P-VOL.
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Initial copy and update copy operations between the P-VOL and S-VOL.
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Pair status and configuration information.
The secondary system manages the S-VOL and the following operations:
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Secondary copy operations issued by the primary system.
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Assists in managing pair status and configuration (for example, rejects write I/Os to the S-VOL).
Typical components 9