HP XP Continuous Access Software - Manual (Page 51)

volumes and asked which volume should be left offline. This can be confusing and prone to
error.
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If the XP Continuous Access Journal secondary data volumes and primary data volumes are
connected to the same host(s), HP strongly recommends that the secondary data volumes are
defined to remain offline to avoid this problem.
Installing the Hardware
Initial installation of the XP Continuous Access Journal hardware is performed by the user and the
HP service representative. To install the hardware required for XP Continuous Access Journal
operations:
1. User: Identify the locations of the XP Continuous Access Journal primary and secondary data
volumes (primary data volumes and secondary data volumes) so that the XP Continuous Access
Journal hardware can be installed and configured properly.
2. HP Service Representative: Make sure that the primary storage system(s) and secondary storage
system(s) are configured for Remote Web Console operations (for example, the SVP is
connected to a LAN). See the HP XP24000/XP20000 Remote Web Console User Guide for
information and instructions on setting up Remote Web Console operations.
3. HP Service Representative: Make sure that the primary storage systems and secondary storage
systems are properly configured for XP Continuous Access Journal operations. For example,
for cache and NVS see
“Cache and Nonvolatile Storage (NVS)” (page 50) . Make sure that
the desired system option modes are enabled; see “Metadata Information” (page 25) . Make
sure that adequate cache is installed and available for XP Continuous Access Journal operations.
You must also consider the amount of Cache Residency Manager data to be stored in cache
when determining the required amount of cache.
4. HP Service Representative: Make sure that the primary storage systems are configured to report
sense information to the host(s). The secondary storage systems should also be attached to a
host server to enable reporting of sense information in case of a problem with a secondary
data volume or secondary storage system. If the remote site is unattended, the secondary
storage systems should be attached to a host server at the primary site so that the system
administrator can monitor the operational condition of the secondary storage systems.
5. HP Service Representative: If power sequence control cables are used, set the power select
switch for the cluster to LOCAL to prevent the primary storage system from being powered off
by the host. Also make sure that the secondary storage system is not be powered off during
XP Continuous Access Journal operations. See
“Managing Power for Storage Systems and
Network Relay Devices” (page 155) for further information on powering off/on the primary
storage systems and secondary storage systems.
6. HP Service Representative: Install the XP Continuous Access Journal remote copy connections
between the primary storage system(s) and secondary storage system(s). This hardware (optical
fibre cables, switches, and so on) is supplied by the user.
See “Setting up Remote Copy Connections” (page 52) for remote copy configurations. Distribute
the paths between different storage clusters and switches to provide maximum flexibility and
availability. The logical paths between the primary storage system and secondary storage
system must be separate from the logical paths between the host and secondary storage
system.
Installing the Hardware 51