HP P9000 for Compatible FlashCopy Mirroring User Guide (AV400-96388, October 2011)

• Specify multiple source datasets that are overlapping or are an inclusive part of another
dataset. However, the number of extents that you may specify per dataset is limited to
16.
• Do not specify multiple target datasets that are overlapping.
• Specify source and target datasets that differ in position.
• Specify the source and target datasets that are in the same volume, provided that they
do not overlap.
6. If the T-VOL is set to offline in step 4, set this volume back to online. This step is not necessary
if the ONLINTGT parameter of the FCESTABL command is set to YES.
FCESTABL command can only be executed once per Compatible FlashCopy relationship. You
cannot execute this command repeatedly for the same Compatible FlashCopy relationship.
The following example shows how the FCESTABL command is used. In this example the
FCESTABL command specifies the following:
• The data on the extent starting from CCHH ‘01000004’ and ending at CCHH
‘0357000A’ in the source device numbered 4202 is to be copied to the extent starting
from CCHH ‘13000001’ and ending at CCHH ‘15570007’ in the target device numbered
4203.
• The data on the extent starting from CCHH ‘02AC0006’ and ending at CCHH ‘02FF000C’
in the source device numbered 4202 is to be copied to the extent starting from CCHH
‘18A00000’ and ending at CCHH ‘18F30006’ in the target device numbered 4203
(the operation mode for copying is set to NOCOPY mode).
Example 14 FCESTABL command (Compatible FlashCopy/ XTNTLST and NOCOPY are
specified)
FCESTABL SDEVN(X'4202') TDEVN(X'4203') MODE(NOCOPY)
XTNTLST(X'01000004' X'0357000A' X'13000001' X'15570007',
X'02AC0006' X'02FF000C' X'18A00000' X'18F30006')
Establishing Compatible FlashCopy relationships by extents using DFSMSdss command
The DFSMSdss command used to process Compatible FlashCopy dataset copy operation is
COPY DS. For information about the available parameters for the DFSMSdss command, see
Table 22 (page 43).
When the COPY DS command is issued, DFSMSdss checks whether the selected volumes meet the
requirements for use as Compatible FlashCopy volumes or not, and automatically determines
whether to process the requested job via the host or not. DFSMSdss processes the COPY DS
command in a few seconds and establishes the Compatible FlashCopy relationship simultaneously
as it completes the processing. The completion of this process is not reported to the user.
The following example shows the DFSMSdss command for processing Compatible FlashCopy
dataset copy operation. In this example, the dataset on the volume numbered FCPY05 is copied
to a volume numbered FCPY06.
54 Performing Compatible FlashCopy operations