How to use the MKSYSB command

I need to make a back up to my tape drive of my OS I am using
version 5.1 AIX
I think the command is [mksysb] but not sure how to use this command as in the syntax to send it to my tape drive.
Any help would be greatly apreciated
Thank you

well first i would man mksysb.

  1. To generate a system backup and create an /image.data file (generated by
     the mkszfile command) to a tape device named /dev/rmt0, enter:
     mksysb -i /dev/rmt0

I think I posted my answer under a new thread by acident
any way I tried this mksysb /dev/rmt1 and it worked great!!
The man pages are very helpful
Thanks Again