HP StorageWorks XP Remote Web Console Software - Manual (Page 8)

1 Overview of Universal Replicator for z/OS
This chapter provides an overview of the XP Continuous Access Journal software.
Unless otherwise specified, the terms disk array and storage system in this guide see:
•
HP StorageWorks XP12000 Disk Array
•
HP StorageWorks XP10000 Disk Array
•
HP StorageWorks Storage Virtualization System (SVS) 200
Hitachi Universal Replicator for z/OS (URz)
The Universal Replicator for z/OS (URz) feature enables you to create and maintain duplicate
copies of all user data stored on the distant XP disk array subsystem for data duplication, backup,
and disaster recovery purposes. This will enable you to recover your valuable data and protect
them from the disaster, for example an earthquake, a fire, or the system failure. URz for the
mainframe systems provides asynchronous copy modes to accommodate a wide variety of user
requirements and data copy/movement scenarios.
URz operations are non-disruptive and allow the primary data volume of each URz volume pair
to remain online to all hosts for both read and write I/O operations. Once established, URz
operations continue unattended to provide continuous, real-time data backup. By establishing the
primary data volumes and secondary data volumes on the different subsystems, you can perform
the asynchronous operations remotely. For Fibre Channel connection, URz operations can be
performed across distances of up to 30 km (18.6 miles) using single-mode long-wave optical fibre
cables in a switch configuration. Long-distance solutions are provided, based on user requirements
and workload characteristics, using approved channel extenders and communication lines. URz
operations can also be performed by using XP StorageWorks for Business Continuity Manager.
When URz is used, data to be copied will be temporarily stored in journal volumes, which are a
type of logical volumes. URz enables you to configure and manage highly reliable data replication
systems, by using journal volumes to reduce chances of suspension of copy operations; copy
operations can be suspended due to restrictions on data transfers from the primary site to the
secondary site.
The FICON host interface can be used to connect URz. For setting the connections to enable remote
copy operations using the FICON host interface, you must set the path configuration carefully. The
following table lists the possible path configurations and indicates which combinations are
supported.
Table 1 URz Configuration with FICON Host Interface
Supported? MCU – RCU Channel – MCU
No ESCON FICON
Yes Fibre-Channel FICON
NOTE: The configuration of FICON for channel-MCU paths and ESCON for MCU-RCU paths is
not supported, because the bandwidth of FICON is greater than that of ESCON interface. If FICON
is used for channel-MCU paths, use Fibre Channel interface for the MCU-RCU paths.
URz operations can be performed in conjunction with Hitachi ShadowImage for z/OS operations
to provide multiple internal copies of URz volumes. URz also supports the Virtual LVI/LUN and
Cache Residency Manager features of the XP disk array, so that URz meets a variety of user needs
and facilitates data copying and data migration.
8 Overview of Universal Replicator for z/OS