Hi,
The lun snap usage -s is still valid.
lun snap usage [ -s ] vol_name snap_name
Displays information about all LUNs in active file system and snapshots that are backed by the given snapshot
This command displays all the LUNs in all the existing snapshots which are currently backed by data in the given snapshot snap_name. If you wish to delete the given snapshot snap_name then you must first destroy all those LUNs in the active file system, which are listed in the output. Thereafter, if vol options snapshot_clone_dependency is not set, you need to delete all the snapshots listed in the output starting from the one listed at the top. Once this is done, you can delete the snapshot snap_name. The -s option provides a summary view of the information.
https://library.netapp.com/ecmdocs/ECMP1511537/html/man1/na_lun.1.html
Regards,
Anoop
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