HP StorageWorks XP Remote Web Console Software - Manual (Page 43)

TrueCopy for z/OS user guide 43
GDPS Support
TC390 provides remote copy support for IBM’s Geographically Dispersed Parallel Sysplex (GDPS) facility.
GDPS is an IBM service offering for mirroring data and balancing workload on disk arrays 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 XP128/XP1024/XP10000/XP12000 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, CESTPATH CGROUP option for 2105, CGROUP (FREEZE/RUN) for
3990). GDPS support may have additional installation requirements for the
XP128/XP1024/XP10000/XP12000 TC390 MCUs and RCUs, depending on
XP128/XP1024/XP10000/XP12000 microcode levels and Command View XP or XP Remote Web
Console software versions. Check the following items with your HP representative:
• SVP modes. For operations in a GDPS environment:
Mode 64 must be OFF.
Mode 104 must be ON for 3990 controller emulation (not valid for 2105 emulation).
For more information on XP128/XP1024/XP10000/XP12000 SVP modes related to TC390
operations, refer to Table 3 on page 20.
Mode 104 must be set before any TC390 pairs are established in a GDPS environment. If TC390 pairs
have already been established, you must delete all pairs and logical paths (CDELPAIR, CDELPATH),
change the SSIDs and mode settings on the MCUs and RCUs, and then re-establish the paths and pairs
(CESTPATH, CESTPAIR). Installation of mode 64 is nondisruptive and can be performed at any time.
Preparing for TrueCopy Operations
System Requirements
TC390 operations involve the XP128/XP1024/XP10000/XP12000 MCUs and RCUs containing the main
and remote volumes, the remote copy connections between the MCUs and RCUs, the zSeries and S/390
host(s) at the main and remote sites, and TC390 running through Command View XP or XP Remote Web
Console.
The TC390 system requirements are:
• MCU: XP128/XP1024/XP10000/XP12000 with TC390 installed.
• RCU: XP128/XP1024/XP10000/XP12000 with TC390 installed.
NOTE: Other XP disk arrays with TC390 installed can be used as an RCU connected to an
XP128/XP1024/XP10000/XP12000 MCU. For assistance with mixed disk array configurations,
contact your HP account support representative.
TC390 can coexist with CA (all copy modes) in the same XP128/XP1024/XP10000/XP12000.
Full Fibre Channel support will allow concurrent fibre-mode CA and TC390 operations.
The XP128/XP1024/XP10000/XP12000 may have additional installation requirements, such as
SVP modes, hardware features such as CHF WP411-B, additional cache, and so forth. For more
information on XP128/XP1024/XP10000/XP12000 SVP modes for TC390, refer to Table 3 on
page 20.
• Serial remote copy connections (see ” Serial Remote Copy Connections ” on page 50):
• Multimode serial interface (ESCON) cables are required at both the MCU and RCU.
• For distances from 3 km to 43 km (1.9 to 26.7 miles), single-mode serial interface cables with IBM
9032 or 9033 ESCON directors (ESCDs) and/or 9036 ESCON repeaters are required.
• For distances greater than 9 km (5.6 miles), the extended distance facility (XDF) provided by the
ESCDs and/or ESCON repeaters is required.