Thanks Tas
I just want to keep the snapshots in the mirrored volume, mirrored with MirrorAllSnapshots policy.
No new snapshot shall be taken on the volume.
So the question is: Is it possible to get the the snapshots deleted when the retention is out?
What I came up to is that is not possible to get Ontap to do as the retention is a number of snapshot i.e. daily 60 and the oldest will be deleted when the 61:st is created. And as I said no more snapshots shall be taken as these backup just shall be kept until retention is reached.