To add a consistency group, Modifying consistency, Group options (ct group option) – HP StorageWorks XP Remote Web Console Software User Manual
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106 Hitachi TrueCopy z/OS for HP XP12000/XP10000 and SVS 200 storage systems
To add a consistency group:
1.
Connect to the MCU.
2.
Verify that the async options are configured as needed (see ”
3.
From the Consistency Group tree, select a consistency group mode that includes the consistency group
that you want to add.
4.
From the Consistency Group list, select the consistency group(s) to add. Make sure to select more than
one group that is not registered yet.
5.
Right-click to display the pop-up menu, click CT Group Operation, and then click Add CT Group. The
Add CT Group window is displayed.
6.
From the Add CT Group window, select the port type (serial or fibre) and group options: copy pending
timeout and RCU ready timeout. Remember that you will not be able to modify the port type of the
group after you assign a pair to the group.
7.
Click Set in the Add CT Group window. The Add CT Group window is closed and the list changes to
the Consistency Group Settings Parameter list.
NOTE:
The options can be modified and/or canceled after you have set them. See ”
parameters and omitting consistency groups
8.
Click Apply on the TrueCopy main window.
9.
If you are using TC390 Async in the n-to-1 configuration, reset the Time Out (Copy Pending) option as
follows to avoid suspension of TC390 pairs due to timeout errors:
a. Suspend all pairs in the group so that you can change the group options.
b. Select the group on the Main window, select Group Option, change the Time Out (Copy Pending)
option to None, and select OK.
c. Resume all pairs in the group, and then perform your normal TC390 Async operations.
d. Acquire the current TC390 async copy delay time by calculating the difference between the host
I/O time-stamp information and the consistency time shown on the CT Group Status window.
e. Suspend all pairs in the group again and set the Time Out (Copy Pending) group option to a value
greater than the current copy delay time. If the value exceeds the maximum time (15 min.), reduce
the host I/O rate, or set the option to None.
f. Resume all pairs in the group.
Modifying consistency group options (CT Group Option)
The CT Group Option command modifies the consistency group options you have set when the consistency
group is added. When the CT Group Option command is selected, the CT Group Option window is
displayed. The CT Group Option window consists of the same boxes as the Add CT Group window (see