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

5-58 Performing TrueCopy for z/OS Configuration Operations
Hitachi Universal Storage Platform V TrueCopy for IBM z/OS User’s Guide
7. To apply the settings, click Apply.
Figure 5-19 CU Option Dialog Box
The Service SIM of Remote Copy option allows you to specify whether the
MCU will report the service-level remote-copy SIMs to the host(s). (The
moderate-, serious-, and acute-level SIMs are always reported to the host.)
Select Report to configure the MCU to report the service-level remote-copy
SIMs to the host(s). The Report setting should be selected for TCz disaster
recovery planning. Select No Report to suppress service-level SIM reporting.
Default setting is No Report.
The PPRC support by host option allows you to specify whether the MCU will
generate sense information which is compatible with IBM PPRC. This option is
extremely important for TCz disaster recovery planning. If the host does not
support PPRC, select No to configure the MCU to report SIMs. If the host
system supports PPRC, select Yes to configure the MCU to generate PPRC-
compatible sense information when a TCz pair is suspended instead of a
service information message (SIM). Default setting is No. If Yes is selected,
the MCU will still report moderate- and serious-level SIMs, as well as DF40 and
DF48 device SIMs.
Note: If you plan to utilize the CGROUP (FREEZE/RUN) command for TCz
pairs, you must select Yes.
The SCP Time(sec.) setting specifies the state-change-pending (SCP) delay
time in seconds (0-600 seconds, default = 120). CGROUP/FREEZE utilizes the
SCP state to suspend host I/Os to TCz M-VOLs. TCzA utilizes the SCP state for
inflow control to prevent cache storage overload. Make sure to set the SCP
Time after you have added all MCU-RCU paths.