Sorry that was a typo, it needs to be turned on not off, look at
"If your host supports SCSI thin provisioning, you can enable the space-allocation option in ONTAP to turn on automatic host-side space management."
Sorry that was a typo, it needs to be turned on not off, look at
"If your host supports SCSI thin provisioning, you can enable the space-allocation option in ONTAP to turn on automatic host-side space management."