HI,
If its through PM, you should have a dataset for those relationships. One of the ways is to mark the relationship as external (i.e. relinquish the relationship). In this case, the primary and secondary volume shall be left untouched. Then you can go ahead and delete them.
[root@shoemaker-rhel6x64-01 ~]# dfpm dataset relinquish help
NAME
relinquish -- mark a relationship as external
SYNOPSIS
dfpm dataset relinquish { [ <destination-volume-name-or-id> ] |
[ <destination-qtree-name-or-id> ] }
DESCRIPTION
The relationship will be marked as external. Source and
destination objects are left unchanged.
The intent is, if you want to use the same relationship you can goahead and import them on a later date.
However you also have dfpm dataset destroy:
[root@shoemaker-rhel6x64-01 ~]# dfpm dataset destroy help
NAME
destroy -- destroy a dataset
SYNOPSIS
dfpm dataset destroy [ -f ] <dataset-name-or-id>
DESCRIPTION
If the dataset contains objects, datasets cannot be destroyed
unless the -f flag is specified.
Hope this is useful.
Thanks,
Arun