ISO_VOLDESC_SEC
secno = ISO_VOLDESC_SEC;
secno = ISO_VOLDESC_SEC;
secno = ISO_VOLDESC_SEC;
secno = ISO_VOLDESC_SEC;
readoff = probe_offset + ISO_VOLDESC_SEC * secsz;
head->fi_blocknum = hdbtodb(ISO_VOLDESC_SEC);
head->fi_blocknum = hdbtodb(ISO_VOLDESC_SEC);
secno = hs_findvoldesc(vp->v_rdev, ISO_VOLDESC_SEC);
sec = (ISO_VOLDESC_SEC * ISO_SECTOR_SIZE) / vd->vdisk_bsize;