Problem with zfs snapshot on ZVOL volumes (for example for iSCSI) https://www.ixsystems.com/community/threads/cannot-create-snapshot-out-of-space.14577/page-2 zfs list -t all -ro name,space,compressratio,quota,refquota,reservation,refreservation nvme1/nvme1 NAME NAME AVAIL USED USEDSNAP USEDDS USEDREFRESERV USEDCHILD RATIO QUOTA REFQUOTA...