fdisk is like the format command on Solaris, but and heres the good news AIX makes it even easier
First you have a volume group - which contains volumes
use lsvg to list them
use smit mkvg to make them
use man mkvg for more detail
*NOTE* A good feature of smit is that when you have filled in the detail you want press f6 or esc+6 to see the command line version of what smit is doing.
Next you have a logical volume (This is a little like a partition)
use lslv to list
use smit mklv to make them
use man mklv for more detail
And Finally you have the File system
take a look at /etc/filesystems
use smit mkfs to make them
see man mkfs
Hope this helps
Mike
"Whenever I dwell for any length of time on my own shortcomings, they gradually begin to seem mild, harmless, rather engaging little things, not at all like the staring defects in other people's characters."