HP XP7 Storage - Manual (Page 55)

Using TSO to establish Compatible FlashCopy relationships by extents
When you establish Compatible FlashCopy relationships by extents with the FCESTABL command,
the parameters in the following table become available:
Table 25 Parameters for the FCESTABL command (Compatible FlashCopy / Dataset copying)
Description Value Parameter
Specifies the extent (copy range) by setting the same starting and ending
addresses of the source and target with CCHH (cylinder and head numbers). Extents (copy range) EXTENTS
From the copy source, the specified data is copied to the same offset position on
the copy target. Up to 32 extents can be specified. When EXTENTS is not
specified, the data on all the tracks are copied.
Specifies the extent (copy range) by setting the starting and ending addresses of
the source, and the starting and ending addresses of the target with CCHH Extents (copy range) XTNTLST
(cylinder and head numbers). From the copy source, the specified data is copied
to a different offset position on the copy target. Up to 32 extents can be specified.
When XTNTLST is not specified, the data on all the tracks are copied.
Specifies the extent (copy range) by setting the starting and ending addresses of
the source, and the starting and ending addresses of the target with ccccccch Extents (copy range) XXTNTLST
(cylinder and head numbers), when either of both the copy source and target
exceed 65,520 cylinders. From the copy source, the specified data is copied to
a different offset position on the copy target. Up to 32 extents can be specified.
When XXTNTLST is not specified, the data on all the tracks are copied.
To execute the XTNTLST parameter, the size of the copy source extent and the copy target extent
must be the same.
When the FCESTABL command with the EXTENTS parameter specified is executed, only the data
on the copy source extents specified by the EXTENTS parameter are copied from the volume
specified as the source by SDEVN to the volume specified as the target by TDEVN. For example,
when you copy only the "dataset 2", the copy operation processes as shown in the following
figure. When you do not specify the EXTENTS parameter, the entire source volume is copied to
the target volume.
Figure 24 Dataset copying with EXTENTS parameter specified (Compatible FlashCopy)
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:
Establishing relationships by extents for Compatible FlashCopy 55