Use the lsvdiskdependentmaps command to display all FlashCopy mappings with target volumes that are dependent upon data held on the specified volume.
The lsvdiskdependentmaps command displays FlashCopy mappings that have target volumes that are dependent upon data held on the specified vdisk_id | vdisk_name. This can be used to determine whether a FlashCopy mapping can be prepared. Issue the command for the target volumevdisk_id | vdisk_name of the FlashCopy mapping to be prepared. If no FlashCopy mappings are returned, the FlashCopy mapping can be prepared. Any FlashCopy mappings that are returned in the list must be stopped or be in the idle_or_copied state, before the new FlashCopy mapping can be prepared.
lsvdiskdependentmaps -delim : 0
The concise resulting output:
id:name 2:fcmap2 5:fcmap5