Hitachi TrueCopy for IBM z/OS User and Reference Guide (T5211-96001, June 2007)

5-36 Performing TrueCopy for z/OS Configuration Operations
Hitachi Universal Storage Platform V TrueCopy for IBM z/OS User’s Guide
Changing the Consistency Group Options
The CT Group Option dialog box (see Figure 5-9) allows you to change the
group options for the existing consistency groups. To display the CT Croup
Option dialog box, select the LDKC where the desired consistency group
belongs, or select Used from the tree in the Asynchronous Operation tab,
select the consistency group from the list, right-click, and then click CT Group
Option command in the sub menu command of the CT Group Operation
command.
Note: If you want to change the group options, you must suspend all pairs in
the group first.
Figure 5-9 CT Group Option Dialog Box
Timer Type: allows you to select the timer type option for the group:
• System = system timer (CPU TOD clock) provided by the I/O time-stamping
function
• Local = local timer (internal MCU TOD clock)
• None = system timer (CPU TOD clock) provided by the I/O time-stamping
function. This timer type should only be selected when establishing TCzA
pairs in the reverse direction (to copy from the secondary site back to the
primary site). When None is selected, the MCU still acquires the time-stamp
information from the host I/O time-stamping function.