How to use ufsdump or dd command in

What is the dd command syntax to copy /myapps to /san/data? What is the ufsdump command syntax to copy /myapps to /san/data? What's the difference between ufsdump and dd? Filesystem size used avail capacity Mounted on /dev/dsk/c1t0d0s0 7.7G 917M 6.7G 12% / /devices 0K 0K 0K 0% /devices ctfs 0K 0K 0K 0% /system/contract proc 0K 0K 0K 0% /proc mnttab 0K 0K 0K 0% /etc/mnttab swap 29G 1.1M 29G 1% /etc/svc/volatile objfs 0K 0K 0K 0% /system/object /dev/dsk/c1t0d0s6 4.8G 3.5G 1.2G 74% /usr fd 0K 0K 0K 0% /dev/fd /dev/dsk/c1t0d0s3 4.8G 2.9G 1.8G 62% /var swap 29G 10M 29G 1% /tmp swap 29G 40K 29G 1% /var/run /dev/dsk/c1t0d0s5 4.3G 2.7G 1.6G 64% /opt /dev/dsk/c1t1d0s0 30G 20G 9.3G 69% /myapps /dev/dsk/c1t0d0s1 532M 354M 125M 74% /usr/openwin /dev/dsk/c1t0d0s7 96G 93G 2.3G 98% /export/home sever2:/san/data 235G 170G 56G 76% /san/data