HP StorageWorks XP Remote Web Console Software - Manual (Page 45)

initial copy priority = 0, CFW data = copy to R-VOL, and DFW to R-VOL = not required.
The TrueCopy for Mainframe software must be used to change these options.
The DFW to R-VOL setting does not affect the I/O performance of the M-VOLs. If one side
of cache is closed due to an RCU failure, the TrueCopy for Mainframe copy operation
still uses DFW. The only difference between not required and required is that new pairs
cannot be established with the DFW-to-R-VOL required option when one side of RCU
cache is closed (the add pair operation fails).
When you create a TrueCopy for Mainframe pair, and if you select only M-VOL for the
CFW data option, the data set which is updated by CFW in M-VOL cannot be used in
R-VOL. To use this data set in R-VOL, release a TrueCopy for Mainframe pair, and format
the data set.
If the Remote Web Console software is not installed, contact your HP account team for further
information on TrueCopy for Mainframe configuration services.
By using Remote Copy Function Switch, you can set the following option with PPRC command:
CFW data = only M-VOL. To use this function, contact your HP service representative.
P/DAS Support
TrueCopy for Mainframe Sync supports the IBM P/DAS host software function. P/DAS allows you
to relocate or migrate data by redirecting all application I/Os from the M-VOL of a TrueCopy for
Mainframe pair to the R-VOL without interrupting access to the data. See the following IBM
publications for important information on 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).
TrueCopy for Mainframe Asynchronous does not support P/DAS SWAP.
Restrictions:
•
P/DAS does not support CFW operations. You must stop CFW applications before performing
P/DAS operations on TrueCopy for Mainframe volumes.
•
P/DAS through channel extenders is not supported.
•
P/DAS swap option #2 (switch pair & swap) is supported for P/DAS between the
XP24000/XP20000 Disk Array, XP12000/XP10000 Disk Array, and XP1024/XP128 Disk
Array.
Contact your HP service representative for the latest information on P/DAS support.
GDPS Support
TrueCopy for Mainframe 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 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 disk
array'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 the HP disk array TrueCopy for Mainframe MCUs and
PPRC Support 45