HP StorageWorks XP24000/XP20000 Continuous Access Software User Guide (T5278-96049, November 2011)

2 About XP Continuous Access Operations
This chapter describes XP Continuous Access operations.
• “XP Continuous Access Components” (page 9)
• “XP Continuous Access Remote Copy Operations” (page 16)
• “XP Continuous Access Asynchronous Recordset Operations” (page 21)
• “XP Continuous Access Synchronous Consistency Group Operations” (page 24)
• “XP Continuous Access Asynchronous Consistency Group Operations” (page 29)
• “Pair Status” (page 31)
• “Interoperability with Other Products and Functions” (page 36)
XP Continuous Access Components
XP Continuous Access operations involve the storage systems at the primary and secondary (remote)
sites, the physical communications paths between these storage systems, and the XP Continuous
Access software. XP Continuous Access copies the original online data at the primary site to the
offline backup volumes at the secondary (remote) site via the dedicated Fibre Channel remote copy
connections. The XP Continuous Access software is included in the Remote Web Console Java
application, and all XP Continuous Access functions and operations can be performed from within
a web browser.
Host failover software is required for effective disaster recovery with XP Continuous Access Software.
Figure 1 (page 10) shows the XP Continuous Access components and their functions:
• Storage systems
The additional shared memory option is required for XP Continuous Access operations.
• Main and remote control units (MCU and RCU)
• Pairs (P-VOLs and S-VOLs)
• XP Continuous Access Asynchronous consistency groups
• Remote copy connections
• Ordinary target ports, initiator ports, and RCU target ports for the Fibre Channel interface
• XP Continuous Access software
• Host failover software
XP Continuous Access Components 9