the standard AIX jfs has 2G limit (just to remind you :-) so you have to use
"large file enabled jfs".
as concerning to adsm db/rec and stg pools - it is not necessary but at the
same time it looks good to put them on separate lv's - it depends on stg
pool size, if it's big I'd do that. I'd also consider another idea - to have
db/rec copy volumes on separate lv or better disk