Registering A Command Device In The Reverse Direction; Command Device Definition Rules; Deleting Command Devices - HP XP P9500 Software User's Manual

1. Execute the YKLOAD command with DAD (DAD ID) and ROUTE (route list ID) parameters.
2. Execute the YKBLDCMD command with the SN (storage system serial number) parameter.

Registering a command device in the reverse direction

To use the Remote DKC Control Function to operate a storage system on the primary site from one
or more other sites, you need to use Business Continuity Manager at one or more other sites to
register a command device in the reverse direction on the storage system at the primary site.
Execute the YKBLDCMD command from Business Continuity Manager at one or more other sites to
locally discover a command device and build a command device on the storage system at one or
more other sites.
Although this is similar to constructing the route in the forward direction, the following requirements
must first be met:
A logical path from one or more other sites to the primary site must be established.
The following files must be sent from the primary site to one or more other sites, or must be
created on one or more other sites: the command device definition file and the route list
definition file, in which a route from one or more other sites to the primary site is defined.
The registration of a command device in the reverse direction (execution of the YKBLDCMD command)
must be performed from Business Continuity Manager on the secondary site for the storage system
at the secondary site, and then for the storage system at the primary site.

Command device definition rules

In a Device Address Domain, each storage system must have a command device.
Communication between command devices is in a single direction. This APID is unique to this
route.
For example, once the communication relationship from command device CD1 to command
device CD2 is defined in a storage system, the communication relationship from command
device CD2 to command device CD1 cannot be defined. In this circumstance, the command
device used by Business Continuity Manager on the Primary site cannot be used by Business
Continuity Manager on the Secondary site.
The location of the Business Continuity Manager that issues the YKBLDCMD command
determines the command communication direction, with that instance of Business Continuity
Manager as the starting point. In this case, reverse direction command devices cannot be
registered from a primary site, even when a route list like that in
configuration for defining control for a Remote DKC Controller" (page 116)
direction command devices are registered from the secondary site.
Use a Gen'ed volume for the command device located in the storage system that is connected
to the host.

Deleting command devices

To delete command devices, execute the YKDELCMD command from the Route Status panel. Delete
command devices starting from those furthest from the host to those closest to the host.
Figure 69 (page 121)
120 Preparing to use Business Continuity Manager
shows an example of deleting command devices.
"Example of copy group
is defined. Reverse