DB V9 uninstall on AIX

db2 V9 installation does not show in AIX's lslpp.

root@hvw2 # /V9.1/instance/dasdrop
SQL4410W The DB2 Administration Server is not active.
DBI1070I Program dasdrop completed successfully.

use the following way to remove it
db2stop in any db2instance
remove any db2 instance, otherwise de-installation will fail
/V9.1/install/db2_deinstall -a -l /tmp/db2V9_uninstall.log