Re: Lun Reclaim from unix end and yet at storage end it does not show released size

Two things:

1st - You didn't mention which *nix, KB here.

https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/What_are_the_recommendations_for_the_host_stacks_supporting_SCSI_UNMAP_(TRIM)_commands%3F

2nd - In any case, If the Host OS TRIM is manually done, then ensure this option is enabled.

-space-allocation enabled (This option enables ONTAP to reclaim space automatically when your host deletes data. It is set to disabled by default.)

Steps here: (You need to follow the exact steps)

https://docs.netapp.com/us-en/ontap/san-admin/enable-space-allocation-scsi-thin-provisioned-luns-task.html