Hitachi TrueCopy for z/OS (T1711-96009, June 2006)
TrueCopy for z/OS user guide 17
If you use HXRC with FICON®, carefully set the path configuration. Refer to the following table.
Continuous Access XP
As an enterprise advantage, the XP1024/XP128/XP12000/XP10000 can be concurrently connected to
zSeries and S/390 and a variety of UNIX-based and PC-server hosts. Contact your HP account support
representative for the latest information on platform and version support. You can use the Continuous
Access (CA) XP feature to maintain remote copies of the UNIX/PC server data stored on the
XP1024/XP128/XP12000/XP10000. TC390 volumes and CA volumes can exist concurrently in the same
XP1024/XP128/XP12000/XP10000.
Overview of TrueCopy Operations
TC390 provides a storage-based hardware solution for concurrent data duplication, migration, and
disaster recovery operations. After TC390 operations are established, remote copies of data are
automatically maintained for backup and disaster recovery purposes. TC390 supports both SMS- and
non-SMS-managed data, is completely application-independent, and is designed to run unattended.
During normal TC390 operations, the main volumes remain online to all hosts and continue to process
both read and write I/O operations.
TC390 Synchronous provides:
• Volume-based, real-time data backup and is ideal for high-priority data backup, duplication, and
migration tasks. In the event of a disaster or system failure at the main site, the remote (secondary)
TC390 Synchronous data can be rapidly invoked to allow recovery at the volume level with an
extremely high level of data integrity.
TC390 Asynchronous (TC390A) represents a unique and outstanding disaster recovery solution for large
amounts of data that span multiple volumes and even multiple XP1024/XP128/XP12000/XP10000.
TC390A’s group-based update sequence consistency solution enables fast and accurate database
recovery, even after a “rolling” disaster, without the need for time-consuming data recovery procedures.
The TC390A volume groups at the remote site can be recovered with full update sequence consistency, but
the updates will be behind the main site due to the asynchronous remote copy operations.
TC390A provides:
• Update sequence consistency for user-defined groups of volumes (such as large databases).
• Protection for write-dependent applications in the event of a disaster.
This overview of TC390 operations describes:
• TC390 components (see page 18)
• TC390 operations (see page 27)
• TC390A recordset operations (see page 30)
• TC390A consistency group operations (see page 34)
• TC390 volume pair status and suspend types (see page 36)
• PPRC support, including P/DAS and GDPS (CGROUP) operations (see page 41)
Table 2 HXRC path configuration with FICON
Application Site Path
(System - DKC)
Record Set Transfer Path
(System Data Mover - DKC)
For Use
ESCON ESCON No
ESCON FICON Supported
FICON ESCON Not Recommended
1
1. If you use FICON for the path of application site, you should also use FICON for the path of System Data
Mover (SDM) because of the difference in performance between FICON and ESCON.
FICON FICON Supported