HP XP P9000 Continuous Access Synchronous for Mainframe Systems User Guide

to the data. See the following IBM publications for important information about the requirements
and procedures for P/DAS operations: Planning for IBM Remote Copy (SG24-2595), Advanced
Copy Services (SC35-0355), DFSMS MVS V1 Remote Copy Guide and Reference (SC35-0169).
Restrictions
The following restrictions apply to P/DAS use with Cnt Ac-S Z:
• P/DAS through channel extenders is not supported.
• P/DAS does not support CFW operations. You must stop CFW applications before performing
P/DAS operations on Cnt Ac-S Z volumes.
• P/DAS swap option #2 (switch pair & swap) is supported for P/DAS between the XP P9500
and XP12000 Disk Array/XP10000 Disk Array.
Contact your HP account team for the latest information about P/DAS support.
GDPS support
Cnt Ac-S Z provides remote copy support for IBM’s Geographically Dispersed Parallel Sysplex®
(GDPS) facility. GDPS is an IBM service for mirroring data and balancing workload on storage
systems spread across two or more sites up to 40 km (20 miles) apart. With this support, users
who are running IBM Parallel Sysplex systems can take advantage of the XP P9500’s suite of
remote copy options for data availability.
GDPS operations feature automatic control of groups of PPRC-managed volumes using host-based
scripts and PPRC commands; for example, CGROUP (FREEZE/RUN). GDPS support may have
additional installation requirements for Cnt Ac-S Z main and remote systems, depending on the XP
P9500 firmware and Cnt Ac-S Z versions. Check with your HP representative.
The XP P9500 does not support controlling the FREEZE Option through the CESTPATH LINK
parameter. The FREEZE Option must be controlled using the CGROUP option of CESTPATH. Please
make changes as needed to the CESTPATH LINK definitions in your GDPS configuration files or
configuration database.
For more information about GDPS, see the following IBM publications: Geographically Dispersed
Parallel Sysplex: the S/390 Multi-site Application Availability Solution, Executive Summary
(GF22-5114); and Geographically Dispersed Parallel Sysplex: the S/390 Multi-site Application
Availability Solution (GF22-5063).
RMF PPRC link path statistical information support
When you use the Resource Measurement Facility (RMF) and specify the IBM TotalStorage Enterprise
Storage Server® (ESS), you can acquire PPRC fibre link path statistical information.
If the total size of the data for the data-acquisition interval is 100 kB or less, zero may be reported
for the data size.
The following topics show XP P9500 storage system adaptor IDs (SAID) for the LINK parameters
(ports) when PPRC link path statistical information is acquired with RMF.
• “SAID values for link path statistical information (CL1)” (page 23)
• “SAID values for link path statistical information (REAR CL2)” (page 24)
22 Requirements and specifications