HP StorageWorks XP Remote Web Console Software - Manual (Page 13)

Continuous Access XP Journal user guide 13
1 Continuous Access XP Journal
This guide covers the following topics:
• ” Overview of copy solutions ” on page 13
• ” Overview of Continuous Access XP Journal ” on page 14
• ” Continuous Access XP Journal operations requirements and restrictions ” on page 35
• ” Configuring disk arrays and logical paths ” on page 75
• ” Using journal groups ” on page 88
• ” Performing Continuous Access XP Journal pair operations ” on page 105
• ” Monitoring remote copy operations ” on page 124
• ” Viewing history of data volume pair operations ” on page 128
• ” Performing optional operations ” on page 132
• ” Disaster recovery operations ” on page 134
• ” Troubleshooting ” on page 137
• ” Power management for disk arrays and network relay devices ” on page 143
• ” Pinned track recovery for Continuous Access XP Journal volumes ” on page 145
• ” SIM reporting ” on page 146
Overview of 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 the distant local disk array for data duplication, backup, and disaster recovery
purposes. This enables you to recover valuable data and protect it from the disaster, such as an
earthquake, a fire, or system failure. Continuous Access XP Journal for UNIX® or PC server uses an
asynchronous copy mode 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 both 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 disk arrays, you
can perform asynchronous operations remotely. For fibre-channel direct 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 Continuous Access XP Journal is used, data to be copied is temporarily stored in a journal volume,
which is 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 operations
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 14) to provide multiple internal copies of
Continuous Access XP Journal volumes. Continuous Access XP Journal also supports the local disk array’s
custom volume and HP Cache LUN XP features, allowing Continuous Access XP Journal to meet a variety of
user needs and facilitates data copying and migration. See ” Combining Continuous Access XP Journal
with other data management functions ” on page 53 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 disk 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.