Prerequisite Information For 3Dc Multitarget; Procedure For Setting Up 3Dc Multitarget - HP StorageWorks P9000 User Manual

The benefit of this configuration is that it provides a third copy of the data, helping to insure that
business can continue in the event of a failure at the other two sites.
Failure recovery occurs as follows:
If a failure occurs in the M-VOL, business is resumed using the Continuous Access Synchronous
Z R-VOL. When the failure is corrected at the primary site, business tasks are transferred back
to the primary site.
In addition, a quick disaster recovery solution can be put in place while the primary site is
being restored, using a Continuous Access Journal Z pair for delta resync. In this configuration,
the Continuous Access Synchronous Z R-VOL is paired with the Continuous Access Journal Z
S-VOL. See
If a failure occurs in the Continuous Access Synchronous Z system (M-VOL and R-VOL), business
is resumed using the Continuous Access Journal Z S-VOL. When the failure is corrected,
business tasks are transferred back to the primary site.
If a failure occurs in the Continuous Access Journal Z system (P-VOL and S-VOL), business is
resumed using the Continuous Access Synchronous Z R-VOL.
See "Recovering from primary site disaster in 3DC multi target configuration" (page 109)
information and procedures.

Prerequisite information for 3DC multitarget

P9500 must be installed at the local, Continuous Access Synchronous Z intermediate, and
Continuous Access Journal Z remote sites.
Business Continuity Manager is recommended at all sites.
Remote Web Console is required at all sites.
The primary site requires the following:
Continuous Access Synchronous Z
◦
◦ Continuous Access Journal Z
Continuous Access Synchronous Z M-VOL = Continuous Access Journal Z P-VOL. This is
◦
the primary production volume.
◦ Continuous Access Journal Z master journal volume
The intermediate site requires the following:
Continuous Access Synchronous Z
◦
◦ Continuous Access Journal Z
Continuous Access Synchronous Z R-VOL
◦
The remote site requires the following:
Continuous Access Journal Z
◦
◦ Continuous Access Journal Z S-VOL
Continuous Access Journal Z remote journal volume
◦
3DC Multitarget is not supported for multiple primary and secondary systems.

Procedure for setting up 3DC multitarget

To set up a 3DC cascading configuration
1. Install and setup Continuous Access Synchronous Z and Continuous Access Journal Z on the
required systems.
2. Create a Continuous Access Synchronous Z pair on the primary system. See HP StorageWorks
P9000 Continuous Access Synchronous for Mainframe Systems User Guide for instructions.
136 Continuous Access Journal Z configurations with Continuous Access Synchronous Z
"Delta resync configuration " (page 137) for more information.
for recovery