HP StorageWorks XP Remote Web Console Software - Manual (Page 109)

Hitachi TrueCopy for z/OS user guide 109
• The MCU’s I/O response is delayed.
• The RCU accepts only the one specific recordset that will enable it to settle the pending recordsets in
the queue(s). For all other recordsets the RCU responds to the MCU with the channel-command-retry
request.
NOTE: If one or more consistency groups exist (TC390 or XP Continuous Access), this setting cannot be
changed. This setting can be changed only when no consistency groups are assigned.
Use the Offloading Timer (min.) box to specify the amount of time, 0-20 minutes that the MCU will wait to
send a TC390A recordset to the RCU. The MCU will suspend all affected TC390A volume pairs if it has not
been able to offload a recordset to the RCU within the specified time (for example, the RCU is still
responding channel-command-retry).
Use the PPRC TSO Command option to select the XP256-compatible format for PPRC TSO commands (see
” Using PPRC commands for TrueCopy ” on page 157). This option should be selected only if you are using
XP256 as RCUs connected to this XP12000/XP10000. The XP256 format limits PPRC operations to sixteen
consistency groups (0-F). The disk array-compatible format (default) performs PPRC operations for all 128
consistency groups (00-7F) of the XP12000/XP10000.
To set the asynchronous option parameters:
1. From the Consistency Group list, right-click to display the pop-up menu and click the Async Operation
command. The Async Option window is displayed.
NOTE: You do not have to select a consistency group on the list.
2. From the Async Option window, select the appropriate parameters.
3. Click Set to set the parameters. The list changes to the Asynchronous Option Settings Parameter list.
NOTE: The options can be modified and/or canceled after you have set them. See ” Modifying
parameters and omitting consistency groups ” on page 109.
4. Click Apply on the TrueCopy main window to apply the option settings to the disk array.
Modifying parameters and omitting consistency groups
After the Consistency Group (CT Group) and/or Asynchronous Option operation, the parameters can be
modified individually. Also the consistency groups that you have set by the operation can be omitted.
To modify the parameters:
1. After you have performed the CT Group Operation, select a consistency group whose parameters you
want to modify on the list. To modify the parameters for Async Option operation, you do not have to
select the row on the list.
2. Right-click to display the pop-up menu and click Modify to modify the parameters. A window for each
operation is displayed.
3. Modify the parameters as needed and click Set.
4. Click Apply on the TrueCopy main window.
To omit the consistency groups: from the operation
1. Select the consistency groups to be omitted from the operation on the list.
2. Right-click to display the pop-up menu and click Omit. The Consistency Groups selected in step 1 are
deleted from the list and the deleted Consistency Groups have been removed from the operations.
3. Click Apply on the TrueCopy main window to apply the deletion to the disk array.
For the CT Group Operation, the Cancel All command deletes all the consistency groups on the list and all
the consistency groups have been removed from the operations. All the consistency groups can also be
deleted using the Omit command by selecting all of the consistency groups on the list. When all the