VxVM 5.0- Replacing rootdisk from rootdg – failing with error "Disk public region is too small"

Error while adding  replaced disk to the root mirror Solaris:/etc/vx/bin> vxdg -g rootdg -k adddisk rootdisk=c1t4d0s2 VxVM vxdg ERROR V-5-1-10127 associating disk-media rootdisk with c1t4d0s2:    Disk public region is too small   Resolution:  Solaris :/etc/vx/bin> vxdisk list DEVICE       TYPE            DISK         GROUP        STATUS c1t4d0s2     auto:sliced     –            –           ...