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

figure. When you do not specify the EXTENTS parameter, the entire source volume is copied to
the target volume.
Figure 25 Dataset Copying with EXTENTS parameter specified (compatible FlashCopy)
When the FCESTABL command with the XTNTLTS parameter specified is executed, only the data
on the copy source extent(s) specified by the XTNTLTS parameter are copied to the copy target
extent(s) specified by the XTNTLTS parameter. For example, when you copy only the “dataset 2”,
the copy operation processes as shown in the following figure.
Figure 26 Dataset Copying with XTNTLTS parameter specified (Compatible FlashCopy)
When you establish a Compatible FlashCopy dataset relationship per extent for a volume with
CATALOG, there will be write operation from the host on both VTOC and CATALOG.
To perform dataset copying by using the FCESTABL command:
1. By using the VTOC list stored in the S-VOL, check the VTOC (INDEX, VTOC, etc.) and the
position of the extent (CCHH, BC Z) 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, or set the ONLINTGT parameter of the FCESTABL command to YES
before proceeding to step 5.
5. Execute the FCESTABL command with the XTNTLST parameter.
By using the XTNTLST parameter of the FCESTABL command, you can specify the information
on the source and target extents. When there are multiple extents, specify the information on
all the extents of the relevant datasets.
Compatible FlashCopy allows you to use the XTNTLST parameter in the following ways.
• 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.
Establishing Compatible FlashCopy relationships 53