HP XP7 Storage - Manual (Page 78)

The information specified by the XTNTLST or XXTNTLST parameter is supported only when the
following conditions are fully met:
•
The information specified by the XTNTLST parameter must be for both the source and target.
If the information specified by the XTNTLST parameter is only for one of the two, the copy
operation results in an error.
•
The size of the specified copy source and target extents must be the same.
•
The relationship must be established with INCREMENTAL = NO or must be established without
INCREMENTAL.
WARNING! When the relationships are withdrawn by the FCWITHDR command executed
with the DDSW parameter set to NO or without setting the DDSW parameter, the data integrity
of the T-VOL cannot be guaranteed.
Case 1: TDEVN Specified, DDSW = NO
All the relationships established with the copy target extents existing in the device specified by
TDEVN are withdrawn. The relationships established with the copy source extents existing in the
specified volume are not withdrawn.
The following is an example of the command description for Case 1. This example requests the
withdrawal of all the relationships established with the copy target extents existing in the device
numbered 4203.
FCWITHDR TDEVN(X'4203')
By executing the command described in the example, the relationship established with the specified
target, Dataset 3, in the device numbered 4203, is withdrawn (see the following figure). But the
relationship established with Dataset 4 is not withdrawn because it is specified as the dataset
source. In short, there are two relationships before executing the command above, and after
executing the command, there is only one relationship.
Figure 29 Diagram of the FCWITHDR command processing (TDEVN: specified, DDSW = NO) (for
Case 1)
78 Performing Compatible FlashCopy operations