HP XP P9000 Continuous Access Synchronous for Mainframe Systems User Guide

7. Restart the pair using the Add Pair(Synchronous) dialog box (or CESTPAIR). Use Entire Volume
for Initial Copy option to resynchronize the P-VOL and S-VOL.
If you are absolutely sure that the P-VOL and S-VOL are still identical, you can restart the pair
using the No Copy option.
RCU maintenance
RCU maintenance consists of the following:
• Changing Minimum Paths, Round Trip Time, other RCU options
• “Adding, deleting SSIDs for an RCU” (page 85)
• “Deleting Continuous Access Synchronous Z” (page 86)
Changing Minimum Paths, Round Trip Time, other RCU options
You can change the options that affect how the system runs your copy operations. These are:
• Number of minimum paths for a pair.
• Wait time until data transfer is complete (MIH RIO).
• FREEZE Option, which defines that the support for the CGROUP (FREEZE/ RUN) PPRC TSO
command is enable or disable.
• Round trip time, which affects update and initial copy priorities. See “Determining Round Trip
Time” (page 32) for more information.
Procedure 20 To change RCU options:
1. From the Remote Web Console, click Actions > Remote Copy > Continuous Access Synchronous
Z> RCU Operation.
2. Change to Modify mode by clicking the icon.
3. Select MCU&RCU in the Display box.
4. Right-click the desired RCU in the list and click RCU Operation/Change RCU Option.
5. In the RCU Option dialog box, change the options as desired. Refer to steps related to the
RCU Option dialog box in the procedure, “Configuring storage systems, defining logical
paths” (page 58).
Adding, deleting SSIDs for an RCU
When new LDEVs are added to the RCU, you make them available for Cnt Ac-S Z operations by
adding the associated SSIDs.
When an LDEV is deleted from an RCU, delete the associated SSID from the RCU in Cnt Ac-S Z to
avoid mis-operation.
Prerequisite information
• You can add three SSIDs to each Cnt Ac-S Z remote system.
• Before adding an SSID, make sure that the data path is properly installed.
• Adding SSIDs is not available for CU Free.
• Before deleting an SSID, make sure that the remaining SSIDs are still valid, otherwise the data
paths will be lost.
Procedure 21 To add or delete SSIDs:
1. In Remote Web Console, click Actions > Remote Copy > Continuous Access Synchronous for
Mainframe > RCU Operation.
2. Change to Modify mode by clicking the icon.
RCU maintenance 85