System Option Modes - HP StorageWorks P9000 User Manual

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 operations.
Install the Continuous Access Journal 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 for the following:
2DC configuration using Continuous Access Journal and Continuous Access Synchronous
Delta Resync configuration using Continuous Access Journal and Continuous Access
Synchronous
Configuring split options for mirrors
Table 7 System option modes
Mode
448
449
474
Description
Mode 448 ON: If the SVP detects a blocked path, the SVP assumes that an error
occurred, and then immediately splits (suspends) the mirror.
Mode 448 OFF: If the SVP detects a blocked path and the path does not recover within
the specified period of time, the SVP assumes that an error occurred, and then splits
(suspends) the mirror.
Note: The mode 448 setting is available only when mode 449 is set to OFF.
Mode 449 ON: The SVP does not detect blocked paths.
Mode 449 OFF: The SVP detects blocked paths and monitors the time until the mirrors
get split (suspended).
Allows you to perform the initial copy operation of the Continuous Access Synchronous
pair for the suspended Continuous Access Journal pair.
Use the script file in which the following operations are described:
Initial copy operation of the Continuous Access Journal pair (None) -> Suspend the
Continuous Access Journal pair -> Initial copy operation of the Continuous Access
Synchronous pair -> Delete the Continuous Access Synchronous pair -> Resynchronize
the Continuous Access Journal pair. The performance of the initial copy processing of
the Continuous Access Journal pair can be improved by issuing the command from
RAID Manager.
Mode 474 ON: The performance of the initial copy processing of the Continuous Access
Journal pair can be improved by issuing the command from RAID Manager.
Mode 474 OFF: Normal operations are performed.
Guidelines for preparing systems for Continuous Access Journal 33