-add $SINGLEMDS $(mkfs_opts $SINGLEMDS) --backfstype ldiskfs --reformat \
- $MDT_DEVNAME > /dev/null || exit 2
+add ${SINGLEMDS} $(mkfs_opts ${SINGLEMDS} ${MDT_DEVNAME}) --backfstype ldiskfs \
+ --reformat ${MDT_DEVNAME} $(mdsvdevname 1) > /dev/null || exit 2