I have just done the same
the last version is is 3 . 1 . 2.90,
This can be downloaded from:
ftp://index.storsys.ibm.com/adsm/fixes/v3r1/aixsrv/LATEST.SERVICE
good morning
Davide Fanizzo
System Administrator
Banca Akros S.p.A.
Cell +39 348 8705668
Tel +39 02 43444040