HP XP7 Storage - Manual (Page 81)

Figure 32 FCWITHDR command processing (SDEVN and TDEVN: specified, DDSW = NO) (for Case
3)
Case 4 (a, b): SDEVN and TDEVN Specified, DDSW = NO, XTNTLST Parameter Specified
Among the relationships established between the source device specified by SDEVN and the target
device specified by TDEVN, the relationships included in the extents specified by the XTNTLST
parameter are withdrawn. The relationships that are only partly included in the specified extents
are not withdrawn.
Even when the FCWITHDR command set as: SDEVN and TDEVN specified, DDSW = NO, and
XTNTLST parameter specified is executed, this command will do nothing and end normally if either
the copy source or target extent specified by the XTNTLST parameter does not cover the extent to
which any relationship is established.
The following is an example of the command description for Case 4: SDEVN and TDEVN: specified,
DDSW = NO, XTNTLST specified. This example requests the withdrawal of the relationships
established within the copy source extent in the device numbered 4202 and the copy target extent
in the device numbered 4203.
FCWITHDR SDEVN(X'4202') TDEVN(X'4203')
XTNTLST(X'00000000' X'0300000E' X'20000000'
X'2300000E')
In this case, the specified extent in the device numbered 4202 includes all of Dataset 1. See the
following figure: Therefore, by executing the FCWITHDR command described in the example, the
relationship established with Dataset 1 is withdrawn. In short, there are two relationships before
executing the FCWITHDR command, and after executing the FCWITHDR command, there is only
one relationship.
Releasing Compatible FlashCopy relationships 81