HP StorageWorks XP Remote Web Console Software - Manual (Page 157)

1. If you plan to suspend one or more TrueCopy for Mainframe Asynchronous pairs using the
drain suspend option, you must STOP all application I/Os to the TrueCopy for Mainframe
Asynchronous M-VOL(s) before suspending the pair(s). This ensures that all pending data in
cache is written to the R-VOL(s) during pair suspension. You do not need to vary the M-VOL(s)
offline.
2. Connect to the MCU or RCU of the pair(s) to be suspended, open the TrueCopy for Mainframe
Pair Operation window. For TrueCopy for Mainframe Synchronous, you must connect to the
MCU. For TrueCopy for Mainframe Asynchronous, you can connect to the MCU or RCU.
3. In the tree, select the CU or the upper CU grouping, which contains the pair(s) to be suspended.
4. In the list, select the pair(s) that you want to suspend. Select either TrueCopy for Mainframe
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 (for example, select Duplex status and Async only).
5. Right-click, and click Suspend Pair to open the Suspend Pair dialog box (see “Suspend Pair
Dialog Box (Asynchronous)” (page 155) ).
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).
CAUTION: Do not use the M-VOL failure suspend kind option if the M-VOL is required for
system operation (for example, 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 Cancel.
8. To start the operation(s), click Apply.
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 to close the error message.
For TrueCopy for Mainframe 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 TrueCopy
for Mainframe 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 Remote Web Console 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).
Resynchronizing TrueCopy for Mainframe Pairs
While a TrueCopy for Mainframe pair is suspended, the MCU does not perform any update copy
operations.
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For a suspended TrueCopy for Mainframe Synchronous pair, the MCU may or may not continue
accepting write I/Os for the M-VOL depending on the M-VOL fence level and suspend kind
Resynchronizing TrueCopy for Mainframe Pairs 157