HP StorageWorks XP Remote Web Console Software - Manual (Page 15)

Continuous Access XP Journal user guide 15
1 Overview of HP copy solutions
Continuous Access XP Journal
You can use HP StorageWorks Continuous Access XP Journal to create and maintain duplicate copies of
all user data stored on a distant array for data duplication, backup, and disaster recovery purposes. This
enables you to recover valuable data and protect it from a disaster, such as an earthquake, fire, or system
failure. Continuous Access XP Journal for a UNIX® or PC server provides asynchronous copy modes to
accommodate a wide variety of user requirements and data copy/movement scenarios. Continuous
Access XP Journal provides a superior hardware-based solution for data duplication, data migration,
remote copy, and disaster recovery tasks.
Continuous Access XP Journal operations are nondisruptive and allow the primary data volume of each
Continuous Access XP Journal volume pair to remain online to all hosts for read and write I/O operations.
Once established, Continuous Access XP Journal continues unattended to provide continuous, real-time
data backup. By establishing primary and secondary data volumes on different arrays, you can perform
asynchronous operations remotely. For Fibre Channel connections, you can perform Continuous Access
XP Journal operations across distances of up to 30 km (18.6 miles) using single-mode longwave optical
fibre cables in a switch configuration.
When using Continuous Access XP Journal, data being copied is temporarily stored in journal volumes,
which are a type of logical volume. You can use Continuous Access XP Journal to configure and manage
highly reliable data replication systems using journal volumes to reduce the possibility of copy operation
suspension. Copy operations can be suspended due to restrictions on data transfers from the primary site
to the secondary site.
You can perform Continuous Access XP Journal operations with Business Copy XP operations (see
” Business Copy XP and ShadowImage for z/OS ” on page 15) to provide multiple internal copies of
Continuous Access XP Journal volumes. Continuous Access XP Journal also supports Volume Manager and
Cache LUN XP on the local array, allowing Continuous Access XP Journal to meet a variety of user needs
and facilitate data copying and migration. See ” Combining Continuous Access XP Journal with other data
management functions ” on page 57 for more information.
Command View XP or XP Remote Web Console displays detailed Continuous Access XP Journal
information and provides options for configuring and performing Continuous Access XP Journal
operations. Command View XP or XP Remote Web Console communicates with the local array’s SVP
through defined TCP/IP connections. If a system failure or disaster occurs at the primary site, Command
View XP or XP Remote Web Console simplifies and expedites disaster recovery procedures.
This guide describes and provides instructions for using the licensed Command View XP or XP Remote
Web Console to perform Continuous Access XP Journal operations. You can also use RAID Manager XP
to perform Continuous Access XP Journal operations from a UNIX or PC host. For more information about
using RAID Manager XP to perform Continuous Access XP Journal operations, see the HP StorageWorks
RAID Manager XP user guide. This guide does not cover Universal Replicator for z/OS® operations for
mainframe data. For information and instructions on performing Universal Replicator for z/OS
operations, contact your HP account support representative.
Business Copy XP and ShadowImage for z/OS
You can use the Business Copy XP and ShadowImage for z/OS data duplication features to set up and
maintain multiple copies of logical volumes within the same local array. You can perform Business Copy
XP operations for UNIX/PC server-based data using the licensed Business Copy XP or RAID Manager XP
on a UNIX/PC host. You can perform ShadowImage for z/OS operations using ShadowImage for z/OS
and also using TSO and/or ICKDSF commands.
RAID-protected Business Copy XP duplicates are created within the same local array at hardware speeds.
You can use Business Copy XP with Continuous Access XP Journal to maintain multiple copies of critical
data at primary and/or secondary sites and provide maximum flexibility in data backup and duplication
activities. See ” Combining Continuous Access XP Journal and Business Copy XP ” on page 60 for more
information.