We also had a similir problem. We use a tool called "sudo". This allows the
user to run command line backups with the permissions of root and nothing
else. Our AIX admin had to set up the command in a file and in another file
a list of users to use that command. I am not sure where he got this tool
but if anyone would like to know let me know and I will ask him.

Susan Wright
Lab Safety Supply
Janesville, WI
S.Wright AT labsafety DOT com