Question : Problem: I need to ufsdump from a live machine to another same hardware machine

What are the steps to backup the os that is installed on one machine to created a identical system .I need to then restore a system to create a identical system.Can some one let me know what else is involve i know that i need to run ufsdump command ...
    What i am trying to do is to backup a system on one of the drive that is attached and then copy that backup to another drive and restore it on that system...Any one has any ideas how an i acomplish this ...
thanks for your help..

Answer : Problem: I need to ufsdump from a live machine to another same hardware machine

snapshots fur UFS are supported since Solaris 8 already ;-)

You can safely run ufsdump with snapshot on a live system and transfer
the resulting dump onto another system

Create ufsdump from root filesystem with snapshot:
 # ufsdump 0f /var/tmp/root.dump `fssnap -F ufs -o raw,unlink,fs=/var/tmp/BS  /`
You will have to make sure that /var/tmp is NOT in your root filesystem. Otherwise, use another directory.

Transfer the dump file onto the other system and mount the new root filesystem under /mnt
Now, extract the dump into it:
 # cd /mnt ; ufsrestore xf /tmp/root.dump
and install the boot block (change c0t0d0s0 to your root device):
 # installboot /usr/platform/`uname -m`/lib/fs/ufs/bootblk /dev/rdsk/c0t0d0s0

If you are short with disk space, create a comressed dump:
 # ufsdump 0f - `fssnap -F ufs -o raw,unlink,fs=/var/tmp/BS  /` | gzip -9 > /var/tmp/root.dump.gz
and extract (on the other system) with
 # cd /mnt ; gzcat /tmp/root.dump.gz | ufsrestore xf -


Another (alternative) option:
Use SVM (Sun Volume Manager - formerly known as SDS, Solstice Disk Suite) to mirror your root disk to a second (identical disk), break the mirror and inster it into the other (identical) system.
This will only work if you really have two identical (e.g. E450) systems.