HP StorageWorks XP Remote Web Console Software User Manual
Page 179
For details on reversing copy direction, see
“Transferring Operations Back to the Primary Site”
.
•
Configuring the secondary EXCTG:
When you have more than one primary journal group (usually means more than one secondary
journal group also), you must configure a secondary EXCTG in order for the secondary data
volumes to be consistent across multiple journal groups. This is a requirement whenever there
exists multiple primary and secondary storage systems and data consistency is needed across
all storage systems. Universal Replicator for Mainframe uses the secondary EXCTG to maintain
the data update sequence of master journal groups that are paired with restore journal groups
in the secondary EXCTG. If no secondary EXCTG is configured, the data update sequence
will not be maintained, and data consistency will not be maintained between multiple journal
groups in the primary and secondary storage systems.
Configuring an EXCTG at the primary site is optional. However, it is required when recovery
operations that copy data from the secondary site to the primary site must maintain data
consistency and multiple journal groups exist.
To register journal groups in an extended consistency group:
1.
Ensure that the Remote Web Console main window is in Modify mode.
For detailed information about how to do this, see the HP XP24000/XP20000 Remote Web
Console User's Guide.
2.
Ensure that the EXCTG Operation window is displayed.
3.
In the EXCTG Operation window (
“EXCTG Operation Window” (page 131)
), select and
right-click an extended consistency group in the tree or in the list.
4.
Select Add JNLG to EXCTG from the pop-up menu.
The Add JNL Group window appears (
“Add JNL Group Window” (page 180)
).
5.
If you do not want to register the journal groups of the supervisor DKC, clear the check box
on the far left of the DKCs (DKC-1 to DKC-4). To register journal groups of the supervisor DKC,
select the check box on the far left of the DKCs (DKC-1 to DKC-4).
6.
Select one of the DKCs (DKC-1 to DKC-4).
NOTE:
•
The word DKC represents a storage system.
•
To register journal groups of the supervisor DKC, move on to step
after this step.
7.
Enter the serial number of the storage system.
NOTE:
If the serial number is already displayed and unchangeable, you do not need to
enter it.
8.
Enter the LDKC number.
NOTE:
If the LDKC number is already displayed and unchangeable, you do not need to
enter it.
9.
Select the control ID.
10.
Specify the LDKC number and the LDEV number of the remote command device.
NOTE:
If the LDKC number and the LDEV number are already specified and unchangeable,
you do not need to specify them.
11.
From the JNLG list on the left, select one or more journal groups that you want to register.
Registering Journal Groups in an Extended Consistency Group
179