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

Performing TrueCopy for z/OS Pair Operations 6-23
Hitachi Universal Storage Platform V TrueCopy for IBM z/OS User’s Guide
4. In the list, select the pair(s) that you want to suspend. Select either
TrueCopy for z/OS Sync or Async pairs (not both). If you plan to use the
Group suspend option, select only one pair in the desired group. The pair
status must be Duplex. Use the Display Filter as needed to display the
desired pairs (e.g., select Duplex status and Async only).
5. Right-click, and click Suspend Pair to open the Suspend Pair dialog box
(refer to
Figure 6-5).
6. On the Suspend Pair dialog box, select the desired suspend options for the
pair(s), and click Set to close the dialog box. The preview list displays the
requested suspend operation(s).
WARNING: Do not use the M-VOL failure suspend kind option if the M-VOL
is required for system operation (e.g., spool, page, or SYSRES volume).
Make sure to use the R-VOL suspend kind option, so that the M-VOL
continues accepting I/Os.
7. Verify the requested operation(s) in the preview list. Make sure that the
suspend options for each pair are correct. The suspend kind option (R-VOL or
M-VOL failure) and fence level of the pair (never, data, or status) determine
whether the M-VOL will accept write I/O operations after the pair is
suspended.
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), that you want to delete 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 the Apply button.
If one or more operation(s) did not start normally, the preview list displays
only the operation(s) that did not start normally. An error code is displayed
on the Error Code column in the preview list. To display an error message,
select one LU, right-click, and click Error Detail. After you see the error
message, click OK button to close the error message.
For TCz Synchronous pairs, the MCU will complete all M-VOL write
operations in progress and the associated update copy operations at the R-
VOL before suspending the pair, so that the pair is synchronized at the
time of suspension. For TCz Asynchronous pairs, the pending update option
(drain or purge) determines whether the pair is synchronized at the time of
suspension.
9. On the Pair Operation window, verify that the suspend pair operation(s)
is/are completed successfully (Suspend status in the list). To monitor the
progress of the suspend pair operation(s), click File, and then Refresh on
the menu bar of the Storage Navigator main window to update the
information in the list, or use the Detailed Information dialog box to monitor
the detailed status of each pair. You can also monitor the host console
messages (IEA494I vs. IEA491E) to verify the operation(s).