>I'd feel safer about having targets opt-in with setting (a new) >ti->num_secure_erase_bios. May be add a new field "bool secure_erase_supported:1" in dm_target structure instead? And set up it "true" in constructor for linear targets. Denis -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel