what version of AIX are you running?
By the names of the File systems I would say they are all qa so a lsvg of qa2vg to see if free space is there
then a

Code:

 lsvg -p qa2vg

to get a look at the distrbution.
Now is this san disk, or SSA or local scsi?
but the command to extend could be different if say AIX 5.2 or AIZ 5.3 ML8
maybe a

Code:

 oslevel -s

so we know.

Lets start with some of this info first.