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

Performing TrueCopy for z/OS Configuration Operations 5-37
Hitachi Universal Storage Platform V TrueCopy for IBM z/OS User’s Guide
MCU-RCU Path: allows you to select the port type for the remote copy
connections. You can only change the port type when the group does not
contain any pairs.
Offloading Timer (min.): allows you to specify the amount of time for
monitoring to transfer data to a sidefile between 0 and 20 minutes in one
second increment. The default setting is 5 minutes.
Enable Inflow Control: allows you to enable the inflow control. To enable
the inflow control, click the check box. By default, the check box is selected.
Before changing this option, you should release or suspend pairs in the
selected consistency group.
Note: If you use Business Continuity Manager, please refer to the Business
Continuity Manager User’s Guide and see explanations about Set Copy Group
Attributes and FLOW CTL. If you use PPRC, please refer to information about
NO DELAY options that are available in PPRC operations.
Time Out (Copy Pending) (min.): allows you to select the maximum delay
allowed for TrueCopy for z/OS Async copy (none or from 3 to 15 mins., none
= no timeout for copy pending). The default setting is five minutes. If the
delay between the TCz M-VOL update and the corresponding R-VOL update
reaches the specified time, the RCU will suspend all R-VOLs in the group. A
timeout occurs when the RCU was not able to settle a recordset within the
specified time, or when the RCU has not had any communication from one of
the MCUs in the group within the specified time.
RCU ready (min.): allows you to select the maximum delay allowed for re-
establishing MCU-RCU communications following MCU power-off (none or from
1 to 10 min., 0 = no timeout for RCU ready). The default setting is five
minutes. If the MCU is not able to re-establish communication with the RCU
within the specified time, the MCU suspends all M-VOLs in the group.
To change the group options for one or more groups:
1. Make sure that all pairs in the group(s) have been suspended, so that you
can change the group options.
2. Click the Asynchronous Operation tab, and select the LDKC that the
consistency groups you want to operate belong to, or Used in the tree to
display the existing consistency groups in the list.
3. Select the consistency group(s) for which you want to change the options.
You can only select groups for which the connected storage system is the
MCU (This CU Type = MCU).
4. Right-click the selected group(s), click CT Group Operation, and then click
CT Group Option to open the CT Group Option dialog box. If the CT Group
Option command is not enabled, you need to suspend the remaining pairs in
this group.