[Sunhelp] ufsdump - HELP!

[Ballweg, Christian]

Hi all,

here is my urgent problem - hope anyone can tell me what fool I am!
I'm trying to do an initial backup from my fresh installed system with
ufsdump. My System has the partitions 
/dev/dsk/c0t0d0s0	/
/dev/dsk/c0t0d0s3	/usr
/dev/dsk/c0t0d0s0	/opt
which I want to backup to a DLT-Drive using ufsdump.
Syntax:
mt -f /dev/rmt/0 rewind
ufsdump 0f /dev/rmt/0cn /dev/dsk/c0t0d0s0
ufsdump 0f /dev/rmt/0cn /dev/dsk/c0t0d0s3
ufsdump 0f /dev/rmt/0cn /dev/dsk/c0t0d0s4
mt -f /dev/rmt/0 rewind

My Problem:
After performing the tasks (all logs tell me DUMP IS DONE) I can't find any
files under /usr and /opt!
What am I doing wrong?!

Thanks in advance

Chris