Guidelines For Preparing Systems For Continuous Access Journal Z; System Option Modes - HP StorageWorks P9000 User Manual

Guidelines for preparing systems for Continuous Access Journal Z

Use the following guidelines to insure that your P9500 systems are ready for Continuous Access
Journal Z:
Identify the locations where your Continuous Access Journal Z primary and secondary data
volumes will be located, then install and configure the P9500 systems.
Make sure that primary and secondary systems are configured for P9500 Remote Web Console
operations. See HP StorageWorks P9000 Remote Web Console User Guide for information.
Make sure that primary and secondary systems are properly configured for Continuous Access
Journal Z operations; for example, cache memory considerations. See the item for Cache and
Nonvolatile Storage in the requirements table,
the amount of Cache Residency data to be stored in cache when determining the required
amount of cache.
Make sure that primary and secondary systems have the system option modes specified that
may be required for your Continuous Access Journal Z configuration. See
modes" (page
Make sure that primary systems are configured to report sense information to the host.
Secondary systems should also be attached to a host server to enable reporting of sense
information in the event of a problem with a S-VOL or secondary system. If the remote system
is not attached to a host, it should be attached to a primary site host server so that monitoring
can be performed.
If power sequence control cables are used, set the power select switch for the cluster to LOCAL
to prevent the primary system from being powered off by the host. Make sure the secondary
system is not powered off during Continuous Access Journal Z operations.
Install the Continuous Access Journal Z remote copy connections (optical Fiber cables, switches,
etc.) between the primary and secondary systems.
When setting up data paths, distribute them between different storage clusters and switches
to provide maximum flexibility and availability. The logical paths between the primary and
secondary systems must be separate from the logical paths between the host and secondary
system.

System option modes

HP provides system option modes to tailor customer requirements on the P9500 system. System
option modes are used with Continuous Access Journal Z for the following:
Delta Resync configuration using Continuous Access Journal Z and Continuous Access
Synchronous Z
Configuring split options for mirrors
System option modes can only be changed by a HP Technical Service representative.
Table 1 1 System option modes
Mode
20
190
37), below for more information.
Description
Mode 20 ON: Enables the read option and VOLSER of the suspended secondary data
volume to be updated.
Mode 20 OFF: Normal operations are performed.
Mode 190 ON: By setting both this mode and the mode 20 to ON, you can update
VOLSER and VTOC of the suspended secondary data volume.
Mode 190 OFF: Normal operations are performed.
Guidelines for preparing systems for Continuous Access Journal Z
"System requirements" (page 17). Also consider
"System option
37