One possibility is that when Host deleted files on the DISK , the auto re-claim on the Storage LUN (Thin-Provisioned) did not happen. If Space Allocation is set to disable than Data ONTAP does not reclaim space automatically when your host deletes data. Verify that space allocation is enabled: lun show -vserver vserver_name -volume volume_name -lun lun_name –fields space-allocation
Hope this helps.
If this post resolved your issue, help others by selecting ACCEPT AS SOLUTION or adding a KUDO.