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

Performing TrueCopy for z/OS Configuration Operations 5-35
Hitachi Universal Storage Platform V TrueCopy for IBM z/OS User’s Guide
6. Click Set to close the Add CT Group dialog box. (Click Cancel to cancel the
add group operations.) The preview list now displays the requested add
group operation(s).
7. Verify the requested operation(s) displayed in the preview list.
To change one or more operations, select the operation(s) from the
preview list, right-click, and click Modify. To remove one or more
operations, select the operation(s) from the preview list, right-click, and
click Delete. To cancel all operations, select all the operations in the
preview list, right-click, and click the Delete command, or click the Cancel
button.
8. To start the operation(s), click Apply.
9. If you are using TCz Async in the n-to-1 configuration, reset the Time Out
(Copy Pending) option as follows to avoid suspension of TCz 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 Asynchronous Operation window, right-click
and click CT Group Operation Æ CT Group Option, change the Time
Out (Copy Pending) option to None, and click Set.
c) Resynchronize all pairs in the group, and then perform normal I/O
operations to the M-VOLs in this group.
d) Acquire the current TCz 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 dialog box.
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) Resynchronize all pairs in the group.