drmach_status
err = drmach_status(bp->b_id, &pstat);
err = drmach_status(cp->sbc_cm.sbdev_id, &pstat);
err = drmach_status(ip->sbi_cm.sbdev_id, &pstat);
err = drmach_status(mp->sbm_cm.sbdev_id, &pstat);
extern sbd_error_t *drmach_status(drmachid_t id, drmach_status_t *stat);
err = drmach_status(bp->b_id, &pstat);
err = drmach_status(cp->sbc_cm.sbdev_id, &pstat);
err = drmach_status(ip->sbi_cm.sbdev_id, &pstat);
err = drmach_status(mp->sbm_cm.sbdev_id, &pstat);
err = drmach_status(mp->sbm_cm.sbdev_id, &pstat);
extern sbd_error_t *drmach_status(drmachid_t id, drmach_status_t *stat);