Bruno, according to the VSI forum, HPE OpenVMS I64 V8.4 has been enhanced to support 'Reclaim for thin provisioned units in OpenVMS' with the VMS84I_SYS-V0700 patch kit. https://support.hpe.com/hpesc/public/docDisplay?docId=pdb_na-VMS84I_SYS_V0700 There seems to be no such support in any VSI OpenVMS I64 release. Volker.