CTL_LUN_PAT_READWRITE
if ((err_desc.pattern & CTL_LUN_PAT_READWRITE) == 0) {
{"rw", CTL_LUN_PAT_READWRITE, CTLADM_ARG_NONE, NULL},
{"readwrite", CTL_LUN_PAT_READWRITE, CTLADM_ARG_NONE, NULL},