HP XP P9500 Storage - Manual (Page 59)

When the FCESTABL command with the XTNTLTS or XXTNTLST parameter specified is executed,
only the data on the copy source extents specified by the XTNTLTS or XXTNTLST parameter are
copied to the copy target extents specified by the XTNTLTS or XXTNTLSTor XXTNTLST parameter.
For example, when you copy only the "dataset 2", the copy operation processes as shown in the
following figure:
Figure 30 Dataset copying with XTNTLTS or XXTNTLST parameter specified (Compatible FlashCopy)
When you establish a Compatible FlashCopy dataset relationship per extent for a volume with
CATALOG, you trigger a write operation from the host on both VTOC and CATALOG.
To perform dataset copying by using the FCESTABL command:
1.
Use the VTOC list stored in the S-VOL to check the VTOC (INDEX, VTOC, etc.) and the position
of the extent (CCHH, BC Ze) used for the dataset copy operation.
2. Create the copy target dataset on the T-VOL.
3. Acquire the VTOC list stored in the T-VOL.
4. Set the T-VOL to offline.
5. Execute the FCESTABL command with the XTNTLST or XXTNTLST parameter.
Use the XTNTLST or XXTNTLST parameter of the FCESTABL command to specify the information
on the source and target extents. When there are multiple extents, specify the information on
all of the extents of the relevant datasets.
Compatible FlashCopy enables you to use the XTNTLST or XXTNTLST parameter as follows:
•
Specify multiple copy target datasets to be copied simultaneously from a single copy
source dataset.
•
Specify the simultaneous execution of volume copying and dataset copying from a single
source volume.
•
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.
Establishing relationships by extents for Compatible FlashCopy 59